What is a control module - Cars & Trucks

Fuse or Relay Number Fuse Rating Protected Component 1 40A Body control module - battery power in feed 1. 2 20A Power outlet main console bin. 3 40A Body control module - battery power in feed 2. 4 30A Fuel pump. 5 5A Powertrain control module keep alive power. 6 20A Powertrain control module power. 7 20A Canister vent solenoid. Evaporative leak control module. Exhaust gas heat recovery (hybrid electric vehicle). Tank pressure control valve (hybrid electric vehicle). Vapor blocking valve. Universal exhaust gas oxygen 11. Universal exhaust gas oxygen 21. Catalyst monitor sensor 12. Catalyst monitor sensor 22. Fuel flap door (hybrid electric vehicle). 8 20A Cooling fan relay coil. Battery interrupt box. Transmission oil pump. Auxiliary coolant pump. Engine coolant bypass valve. Electric A/C compressor (hybrid electric vehicle). Active grille shutters. 9 20A Ignition coils. 13 40A Front blower motor relay. 14 15A Transmission oil pump. A/C compressor variable clutch. Auxiliary pumps (hybrid electric vehicle). Electric A/C compressor (hybrid electric vehicle). Active grille shutters. 16 15A Windshield and rear window washer pump relay power. 17 5A Charge status indicator (hybrid electric vehicle). 18 30A Starter motor. 21 10A Headlamp red and blue flasher. 22 10A Electric power assisted steering module. 23 10A Anti-lock brake system module with integrated park brake. 24 10A Powertrain control module. Hybrid powertrain control module. 25 10A Air quality sensor. 360 camera with park aid. Rear view camera. Blind spot information system. Adaptive cruise control module. 26 15A Transmission control module. 28 40A Anti-lock brake system valves with integrated park brake. 29 60A Anti-lock brake system pump with integrated park brake. 30 30A Driver seat module. 31 30A Passenger seat motor. 32 20A Front media bin power point. 33 20A Rear cargo area power point. 34 20A Console end cap power point. 35 20A Console end cap power point. 36 40A Power inverter. 38 30A Climate controlled seat module. 41 30A Power liftgate module. 42 30A Trailer brake control module. 43 60A Body control module. 44 10A Brake on and off switch. 46 15A Battery charger control module (hybrid electric vehicle). 50 40A Heated backlite. 54 20A Visor control module. Run/start access feed. 55 20A Trailer tow park lamps. 57 30A Trailer tow battery charge. 58 10A Trailer tow backup lamps. 61 15A Not used (spare). 62 15A Headlamp washer pump. 64 40A Four-wheel drive module. 69 30A Front window wiper motor. 71 15A Rear window wiper motor. 72 20A Not used (spare). 73 30A Driver door module. 78 - Not used. 79 - Not used. 80 20A Not used (spare). 82 20A Not used (spare). 88 20A Rear blower motor. 91 20A Trailer tow lighting module. 95 15A Integrated spark control (hybrid electric vehicle). 96 15A Not used (spare). 97 10A Electric AC (hybrid electric vehicle). High voltage positive temperature coefficient heater (hybrid electric vehicle). 98 10A Traction battery coolant proportional valve (hybrid electric vehicle). 103 50A Rear power lug. 104 50A Rear power lug. 105 40A Not used (spare). 106 40A B+ feed. 107 40A B+ feed. 108 20A Spot lamp. 109 30A Passenger door module. 111 30A Body control module voltage quality monitor feed. 112 20A Not used (spare). 114 50A Not used (spare). 115 20A B+ feed. 116 5A Start access circuit. 118 20A Run/start feed. 120 15A Port fuel injectors. 124 5A Rain sensor. 125 5A USB smart charger 1. 127 20A B+ feed. Rear traffic advisor. Visor control module. 128 15A Not used (spare). 131 - Not used. 133 - Not used. 134 10A Delay accessory power. 136 20A Not used (spare). 139 5A USB smart charger 2. 142 5A Traffic cam. 146 15A Battery electronic control module. 148 30A Left-hand headlamp module. 149 30A Right-hand headlamp module. 150 40A B+ feed. 155 25A Transmission control module (hybrid electric vehicle). 159 15A DC/DC converter (hybrid electric vehicle). 160 10A B+ feed. Front warning lights. Strobes. 168 20A Low voltage service disconnect. 169 10A Coolant pump (hybrid electric vehicle). 170 10A Traction battery coolant pump (hybrid electric vehicle). Pedestrian sounder (hybrid electric vehicle). 177 10A Not used (spare).

Note: Spare fuse amperage may vary.
Passenger Compartment Fuse Panel
The fuse panel is under the instrument panel to the left of the steering column.
Note: It may be easier to access the fuse panel if you remove the finish trim piece.

Fuse or Relay Number Fuse Rating Protected Component 1 - Not used. 2 10A Moonroof. Inverter. Telematics control unit module. Driver door switch pack. 3 7.5A Memory seat switch. Wireless accessory charger module. Seat switches. 4 20A Not used (spare). 5 - Not used. 6 10A Not used. 7 10A Smart data link connector power. 8 5A Telematics control unit module. Hands-free liftgate actuation module. Power liftgate module. 9 5A Keypad switch. Rear climate control. 10 - Not used. 11 - Not used. 12 7.5A Climate control head. Gear shift module. 13 7.5A Steering column control module. Smart datalink connector. Instrument cluster. 14 15A Not used (spare). 15 15A SYNC. Integrated control panel. 16 - Not used. 17 7.5A Headlamp control module. 18 7.5A Steering wheel interface. 19 5A Headlamp switch. 20 5A Ignition switch. Telematics control unit module. Key inhibit solenoid lock. 21 5A Not used. 22 5A Not used (spare). 23 30A Not used (spare). 24 30A Moonroof. 25 20A Not used (spare). 26 30A Not used (spare). 27 30A Not used (spare). 28 30A Not used (spare). 29 15A Integrated computer screen. 30 5A Brake switch signal. 31 10A Terrain management switch. Selectable drive mode switch. Transceiver module. 32 20A Audio control module. 33 - Not used. 34 30A Run/start relay. 35 5A Low gear select. 36 15A Park assist module. Image processing module A. 37 20A Not used (spare). 38 30A Left-hand rear power window. Right-hand rear power window.

HDM module ??????? No such module .
DTC U0100 00: Lost Communication With Engine/Powertrain Control Module (ECM/PCM)
DTC U0101 00: Lost Communication With Transmission Control Module (TCM)
DTC U0121 00: Lost Communication With Electronic Brake Control Module (EBCM)
DTC U0140 00: Lost Communication With Body Control Module (BCM)
DTC U0151 00: Lost Communication With Restraints Control Module
DTC U0155 00: Lost Communication With Instrument Panel Cluster (IPC) Control Module
DTC U0164 00: Lost Communication With HVAC Control Module
DTC U0168 00: Lost Communication With Vehicle Theft Deterrent (VTD) Control Module
DTC U0170 00: Lost Communication With Passenger Presence System (PPS)
DTC U0184 00: Lost Communication With Radio
DTC U0186 00: Lost Communication With Audio Amplifier
DTC U0194 00: Lost Communication With Digital Radio Receiver (DRR)
DTC U0198 00: Lost Communication With Communication Interface Module (OnStar®)
DTC U0209 00: Lost Communication With Heated Seat Module (HSM)
DTC U0214 00: Lost Communication With Remote Function Actuation (RFA)

These are all the modules onyour vehicle - no hdm module .

C0292
Lost Communications with Engine Control System
EBCM
DTC C0290 or C0292 in Antilock Brake System
Your best bet ! Take it to a quaified repair shop . Do you know what Class 2 data bus is ?

Class 2 Serial Data Line
The class 2 serial data line on this vehicle is a star configuration. The following modules communicate on the class 2 serial data line:
• Audio Amplifier, w/UQ7 and Y91
• Body Control Module (BCM)
• CD Changer (CDX), w/U1S and Y91
• Digital Radio Receiver (DRR), w/U2K or U2L
• Driver Door Module (DDM)
• Driver Seat Module (DSM), w/AN3
• Electronic Brake Control Module (EBCM)
• Electronic Suspension Control (ESC) Module, w/Z55
• Front Passenger Door Module (FPDM)
• Generator Battery Control Module (GBCM)
• HVAC Control Module
• HVAC Control Module - Rear Auxiliary
• Instrument Panel Cluster (IPC)
• Powertrain Control Module (PCM)
• Radio
• Rear Seat Audio (RSA) Controller, w/UK8
• Rear Seat Entertainment (RSE) Assembly, w/U42
• Rear Wheel Steering Control Module (RWSCM)
• Inflatable Restraint Sensing and Diagnostic Module (SDM)
• Transfer Case Shift Control Module (TCSCM), w/NP1/NP8
• Vehicle Communication Interface Module (OnStar), w/UE1
• Vehicle Theft Deterrent (VTD) Module, w/VD1
The class 2 serial data line allows a scan tool to communicate with these modules for testing purposes, checking for DTCs, and to activate/enable/disable functions. These class 2 serial data circuits are bused together via three splice packs and DLC:

U1040
DTC U1001-U1254 IPC, PCM, SDM

Electronic Brake Control Module (EBCM)
040

The control module ID number list below provides a method for determining which module is not communicating. A module with a class 2 serial data circuit malfunction or which loses power during the current ignition cycle will have a Loss of Communication DTC set by other modules that depend on information from that failed module. The modules that can communicate will set a DTC indicating the module that cannot communicate. When no message is detected from a learned identification number for 5 seconds, a DTC U1??? where ??? is equal to the 3-digit identification number is set.
Control Module
ID Number
Powertrain Control Module (PCM)
016
Electronic Brake Control Module (EBCM)
040
Dash Integration Module (DIM)
064
HVAC Control Module or IPM
065
Rear Integration Module (RIM)
066
Inflatable Restraint Sensing and Diagnostic Module (SDM)
088
Instrument Panel Cluster (IPC)
096
Head Up Display (HUD)
098
Radio
128
Remote Playback Device - CD Changer
130
Digital Radio Receiver (DRR)
137
Vehicle Communication Interface Module (VCIM)
151
Driver Door Module (DDM)
160
Front Passenger Door Module (FPDM)
161
Left Rear Door Module (LRDM)
162
Right Rear Door Module (RRDM)
163
Memory seat Module (MSM)
166
Driver Door Switch Assembly (DDSA)
170
Remote Control Door Lock Receiver (RCDLR)
176
Theft Deterrent Control Module
192
The electronic brake control module is communicating , no need to bother the PCM . The code was set in pcm because it lost communication with EBCM , PCM not the problem .
Electronic Brake Control Module (EBCM)
Left Front lower corner of the engine compartment, under the air cleaner housing .
Check power's an ground's . Will a scan tool talk to it ?

Do you mean the transmission control module ? It is incorporated into the engine control module . PCM - powertrain control module .

Powertrain Control Module (PCM) (L36/L67)
Left front of the engine compartment, inside the air cleaner assembly
Engine Controls Component Views in Engine Controls - 3.8L
Powertrain Control Module Connector End Views in Engine Controls - 3.8L
Powertrain Control Module (PCM) (LG8)
Left front of the engine compartment, inside the air cleaner assembly

What computer chip ? Your vehicle has up ten computers on the vehicle . PCM - engine control module , BCM - body control module , SRS - air bag control module , EBCM - electronic brake control module , The instrument cluster has a microprocessor inside , the heater / A/C control panel is a control module .All the control modules on your vehicle are connected on a serial data communication network .
There are 2 different communication networks on this vehicle: The class 2 network and the GMLAN network. The class 2 serial data circuit is the low speed link, and the GMLAN serial data circuit is the high speed link. Modules that need real time communications are attached to the high speed network. The engine control module (ECM) is the gateway between the networks. The purpose of the gateway is to transfer information from one network to another.
When one of these modules is changed it needs to be programmed , unfortunately the dealer is the only place to have it done at. A GM factory scan tool is needed to do the job ! If it's not done correctly the whole vehicle network will lock up, making the vehicle inoperable .
Class 2 Serial Data Link
The class 2 serial data link allows the following modules to communicate and share data with each other:
?€¢
Body control module (BCM)

?€¢
Digital radio receiver

?€¢
Electronic brake control module (EBCM)

?€¢
Engine Control Module (ECM) (LY7)

?€¢
Instrument panel cluster (IPC)

?€¢
HVAC module

?€¢
Powertrain control module (PCM) (L26)

?€¢
Radio

?€¢
Inflatable restraint sensing and diagnostic module (SDM)

?€¢
Vehicle control interface module (VCIM)

The GMLAN serial data communications circuit used on this vehicle is in a linear topology. The following modules are connected to the link, in order from DLC to the end of the linear configuration:
The following modules communicate on the GMLAN serial data circuit:
?€¢
The transmission control module (TCM), (LY7) 3.6-L

?€¢
The engine control module (ECM), (LY7) 3.6-L

I very strongly suggest you don't try to fix this problem !

One of the modules may be doing it , interior light lit -glove box ! Hard to say on newer vehicles , after 1996 ! You vehicle has some of these modules if not all !
The class 2 serial data line on this vehicle is a star configuration. The following modules communicate on the class 2 serial data line:
?€¢
The body control module (BCM)

?€¢
The digital radio reciever

?€¢
The driver door module (DDM)

?€¢
The electronic brake control module (EBCM)

?€¢
The front passenger door module (FPDM)

?€¢
The HVAC control module

?€¢
The inflatable restraint sensing and diagnostic module (SDM)

?€¢
The instrument panel cluster (IPC)

?€¢
The memory seat module (MSM)

?€¢
The powertrain control module (PCM)

?€¢
The radio

?€¢
The radio amplifier

?€¢
The rear seat audio (RSA) controller

?€¢
The rear seat entertainment (RSE) assembly w/U42

?€¢
The rear wheel steering control module

?€¢
The remote playback device-CD player w/U1S

?€¢
The transfer case shift control module

?€¢
The transmission control module (TCM) w/Allison Transmission

?€¢
The theft deterrent control module

?€¢
The vehicle communication interface module (VCIM) w/UE1

The way to find the drain on the battery is to do a Parasitic Draw Test ! I'll send a link for Eric the car guy !
How To Perform Parasitic Draw Test EricTheCarGuy

Attached are the diagrams requested - good luck!
Fascia 1


Fuse, (Amps), Circuit
F1 -
F2 -
F3 -
F4 -
F5 -
F6 -
F7 -
F8 -
F9 (5A) Supplementary restraint system (SRS) control module
F10 (10A) Four wheel drive control module
F11 (5A) Parking aid control module, self-parking system control module
F12 (10A) Gas discharge headlamp control module (LH)
F13 (5A)
ABS/ESP system, AC system, anti-dazzle interior mirror, heated windscreen washer jets, seat occupation control
module, transmission control module (TCM), reversing lamps, engine management system
F14 (10A)
ABS control module, engine control module (ECM), heated seats, power steering control module, suspension
control module, trailer control module, AC control module, instrumentation control module, CAN data bus
gateway control module
F15 (10A)
Auxiliary heater, data link connector (DLC), parking brake control module, engine management, headlamp
direction control module
F16 (10A) Gas discharge headlamp control module (RH)
F17 (5A) Instrument panel
F18 (10A) Mobile telephone control module, multimedia control module
F19 (10A) Steering column function control module 2
F20 (5A) ABS control module, AC system, transmission control module (TCM)
F21 (15A) Door function control module, left rear, door function control module, right rear, multifunction control module 2
F22 (5A) Alarm system, multifunction control module 2
F23 (10A) ABS/ESP system, AC system, data link connector (DLC), rear view camera control module, headlamp switch
F24 (10A) Door function control module, driver, door function control module, passenger
F25 (20A) Transmission control module (TCM)
F26 -
F27 -
F28 (40A) AC control module, auxiliary heater
F29 (15A) Rear screen wiper motor
F30 -
F31 (20A) Auxiliary power sockets, cigarette lighter
F32 -
F33 -
F34 -
F35 -
F36 -
F37 -
F38 (10A) Steering column function control module 1
F39 (20A) Headlamp washers
F40 (15A) Trailer control module
F41 (15A) Trailer control module
F42 (20A) Trailer control module
F43 (25A) Sunroof control module
F44 (25A) Parking brake control module
F45 (25A) Heater blower motor, heated rear window
F46 (30A) Door function control module, driver, door function control module, passenger
F47 (30A) Door function control module, driver, door function control module, right rear
F48 (15A) Fuel pump (FP)
F49 (20A) multifunction control module 2
F50 (25A) Parking brake control module
F51 (40A) AC/heater blower motor control module
F52 (30A) Seat heater control module
F53
(20A/30A)
Headlamp washers
F54 (30A) Auxiliary power sockets
F55 (15A) Lumbar support adjustment
F56 (15A) Suspension control module
F57 (25A) Sun blind control module
F58 (1A) Trailer warning lamp
F59 (20A) Multimedia control module
F60 -

Fascia 3




in engine bay



Fuse (Amps) Circuit
F1 -
F2 -
F3 (5A) Multifunction control module 2
F4 (30A) ABS/ESP system
F5 -
F6 (5A) Instrumentation control module, steering column function control module 2
F7 (40A) Ignition main circuits
F8 (25A) In-car entertainment (ICE)
F8 (25A) Voltage converter
F9 (5A) Mobile telephone control module
F10 (5A/10A) Engine control module (ECM)
F11 (20A) Auxiliary heater control module
F12 (5A) CAN data bus gateway control module
F13 (15A/30A) Engine control module (ECM)
F14 (5A) Engine management system
F15 (5A/10A/15A) Fuel pump (FP), AC compressor clutch, engine management system
F16 (30A) Multifunction control module 2
F17 (15A) Alarm system horn
F18 (30A) Audio system
F19 (30A) Windscreen wiper motor
F20 (10A) Engine management system
F21 (10A/20A) Engine management system, fuel pump (FP) control module
F22 (5A) Clutch pedal position (CPP) switch
F23 (10A) Engine management system
F24 (10A) Engine coolant blower motor control module, engine management system, engine coolant heater
F25 (40A) ABS/ESP system
F26 (30A) Multifunction control module 2
F27 -
F28 (50A) Glow plug control module
F29 (50A) Electric seats
F30 (50A) Ignition switch circuits
Location Component
1 Petrol: Engine control (EC) relay 1
1 Diesel: Ignition main circuits relay
2 Petrol: Engine control (EC) relay 2
2 Diesel: Engine control (EC) relay

Here is the full list of fuses for you! and for the car.

Fuses on E-box, on left in Engine Compartment

Fuse 1 - Not assigned

Fuse 2 - 10/15A - Engine control unit

Fuse 3 - 5A - Radiator fan control unit

Fuse 4 - 5/10/15A - Lambda probe heater,
Lambda probe 1 heater after
catalytic converter

Fuse 5 - 10A, 20A - Lambda probe heater1,
Lambda probe 1 heater after
catalytic converter,
Fuel system diagnostic pump,
Charge pressure control solenoid
valve,
Exhaust gas recirculation cooler
change-over valve,
Crankcase breather heater element,
Vacuum pump for brakes

Fuse 6 - 5A, 10A,15A - Fuel system diagnostic pump,
Throttle valve module,
Activated charcoal filter system
solenoid valve 1,
Continued coolant circulation pump,
Auxiliary air heater heating element

Fuse 7 - 20A, 5A - Ignition transformer,
Fuel pressure regulating valve,
Fuel metering valve

Fuse 8 - 10A - Throttle valve module,
Activated charcoal filter system
solenoid valve 1

Fuse 9 - 5A - Automatic glow period control unit,
Electric fuel pump 2 relay,
Fuel pump relay

Fuse 10 - 5A - Speedometer sender,
Brake light switch

Fuse 11 - Not assigned

Fuse 12 - 5A - Coolant circulation pump

Fuse 13 - 5A - Water pump

Fuse 14 - 5A - Engine control unit

Fuse 15 - 30A - Voltage stabiliser

Fuse 16 - 30A - ABS control unit

Fuse 17 - 30A - Automatic gearbox control unit

Fuse 18 - 20A - Automatic gearbox control unit

Fuse 19 - 1A - Onboard supply control unit

Fuse 20 - 30A - Onboard supply control unit (AW0)
Automatic intermittent wash and
wipe relay (AW1)

Fuse 21 - 50A - Secondary air pump motor

Fuse 22 - Not assigned

Fuse 23 - 40A - ABS control unit

Fuse 24 - 50A - Trailer detector control unit

Fuse 25 - 50A - Terminal 15 voltage supply relay 2

Fuse 26 - 60A - Automatic glow period control unit

Fuse 27 - 60A - Radiator fan

Fuse 28 - 40A - Onboard supply control unit (AW1)

Fuse 29 - 40A - Onboard supply control unit (AW1)

Fuse 30 - 50A - Terminal 75 voltage supply relay 1

Fuse 31 - 30A - Amplifier

Fuse 32 - Not assigned

**************************************************

Fuse assignment - Interior Fuse Panel

Fuse 1 - Not used

Fuse 2 - 5A - Electronic steering column lock control module

Fuse 3 - 10A - Instrument cluster control module

Fuse 4 - Not used

Fuse 5 - Not used

Fuse 6 - 10A - Vehicle electrical system control module,
Interior ceiling lights,
Tail lights

Fuse 7 - 5A - Fog lamp relay,
Instrument panel and switch illumination dimmer switch,
License plate lamps,
Vehicle electrical system control module

Fuse 8 - 7.5A - Windshield and headlamp washer pump switch,
Windshield washer pump

Fuse 9 - 5A - Airbag control module

Fuse 10 - 10A - Right steering column switch

Fuse 11 - Not used

Fuse 12 - Not used

Fuse 13 - 5A - Automatic dimming interior rearview mirror,
Light recognition sensor,
Parking aid control module,
Air quality sensor,
High pressure sensor,
Climatronic control unit,
Tire pressure monitoring button,
Back-up lamp switch,
Left washer nozzle heater,
Right washer nozzle heater,
28-pin connector

Fuse 14 4- 10A - Left steering column switch,
ABS control module,
Light switch,
Airbag spiral spring/return spring with slip ring,
Fuel pump control module,
Data bus on board diagnostic interface

Fuse 15 - 10A - 16-pin connector (diagnostic connector),
Instrument panel and switch illumination dimmer switch,
Headlamp range control adjuster,
Auxiliary heater operation relay,
Mass airflow sensor,
Positive crankcase ventilation heating element,
Left front headlamp,
Left headlamp beam adjustment motor,
Right front headlamp,
Right headlamp beam adjustment motor,

Fuse 16 - 10A - Engine control module

Fuse 17 - Not used

Fuse 18 - 15A - Left front headlamp

Fuse 19 - 15A - Right front headlamp

Fuse 20 - 10A - Automatic transmission control module,
Selector lever sensor system control module,
Tiptronic switch,
Climatronic control unit,
Ignition/starter switch

Fuse 21 - Not used

Fuse 22 - 10A - Ignition/starter switch,
Converter box,
Alarm horn,
Interior monitoring sensor,
Alarm horn relay,
Dual tone horn relay

Fuse 23 - 10A - Vehicle electrical system control module,
16-pin connector (diagnostic connector),
Light switch,
Rain/light recognition sensor,
Compass magnetic field sensor,

Fuse 24 - 10A - Vehicle electrical system control module,
Access/start authorization control module

Fuse 25 - 15A - Automatic transmission control module,
Selector lever sensor system control module,
Multifunction transmission range switch

Fuse 26 - 15A - Brake system vacuum pump

Fuse 27 - Not used

Fuse 28 - 40A - Auxiliary heater operation relay

Fuse 29 - 1A - Vehicle electrical system control module,

Fuse 30 - 20A - Cigarette lighter,
12 V socket,
12 V socket 2,
Blocking diode

Fuse 31 - 30A - Light switch

Fuse 32 - 20A - Light switch

Fuse 33 - 40A - Heater/heat output switch,
Fresh air blower relay,
A/C control module,
Fresh air blower switch

Fuse 34 - 15A - Left front headlamp,
Left front headlamp,
Instrument cluster control module

Fuse 35 - 10A - Steering column electronics control module,
Instrument cluster control module,
Signal horn activation,
Data bus on board diagnostic interface

Fuse 36 - 25A - Vehicle electrical system control module

Fuse 37 - 15A - Left front headlamp DRL

Fuse 38 - 15A - Right front headlamp DRL

Fuse 39 - 15A - Low beam relay

Fuse 40 - 15A - Towing recognition control module

Fuse 41 - 15A - Towing recognition control module

Fuse 42 - 20A - Towing recognition control module

Fuse 43 - 30A - Front passenger door control module

Fuse 44 - A25 - Rear window defogger relay,
Vehicle electrical system control module

Fuse 45 - 30A - Driver door control module,
Front passenger door control module

Fuse 46 - 30A - Left rear door control module,
Right rear door control module

Fuse 47 - 15A - Fuel pump control module,
Fuel pump relay,
Fuel primer relay

Fuse 48 - 20A - Vehicle electrical system control module,
Vehicle electrical system control module,
Vehicle electrical system control module,

Fuse 49 - 20A - Climatronic control unit,
A/C control module

Fuse 50 - 30A - Front seat heating control module

Fuse 51 - 30A - Power sunroof control module

Fuse 52 - 20A - Dual tone horn relay

Fuse 53 - 15A - Front seat heating control module

Fuse 54 - 15A - Fog lamp relay

Fuse 55 - 20A - Light switch,
Left steering column switch

Fuse 56 - Not used

Fuse 57 - 15A - Radio,
Radio/navigation display unit control module

Fuse 58 - 1A, 30A - Telephone transceiver
DC/AC converter with socket, 12V-230V

Fuse 59 - 30A - Amplifier

Fuse 60 - 30A - Auxiliary heater control module


Hope this helps

--N

Having it hooked up to a factory scan tool would be your best bet . Check for DTC'S diagnostic trouble codes . Without testing ,code scan ,we'd only be guessing .
Very complex , the untrained person hasn't got a pray of fixing this . You have no idea what your dealing with . Vehicle Dynamic Suspension The vehicle dynamic suspension consists of the following components:

• Rear air suspension control (RAS) module (5A919)
• Snorkel
• Drier
• Air compressor (5319)
• Air suspension switch (5K761)
• Solenoid valve (5311)
• Air spring (5560)
• Air suspension height sensor (5359)
• Air line
• Rear Air Suspension Control Module
  A microprocessor controls the air suspension system. The microprocessor and its supporting hardware are contained in the rear air suspension control module. The rear air suspension control module responds to signals from various sensors in the vehicle to maintain the programmed ride height while the vehicle is either moving or stopped. The rear air suspension control module accomplishes this by opening and closing solenoid valves to control the amount of air in the air spring(s). The rear air suspension control module turns on the compressor by applying voltage through the compressor relay to inflate the air spring(s) and raise the vehicle. The rear air suspension control module opens the vent solenoid to lower the vehicle by releasing air from the air spring(s) in response to signal inputs from the air suspension height sensor(s).
• Rear Air Suspension Control Module Diagnostic Trouble Code (DTC) Index DTC Description Source Action B1317 Battery Voltage High Rear Air Suspension Control Module GO to Pinpoint Test C . B1318 Battery Voltage Low Rear Air Suspension Control Module GO to Pinpoint Test C . B1342 ECU Is Defective Rear Air Suspension Control Module INSTALL a new rear air suspension control module. REFER to Module-Air Suspension Control . TEST the system for normal operation. C1441 Steering Sensor Channel A Circuit Failure Rear Air Suspension Control Module REFER to Section 211-00 . C1442 Steering Sensor Channel B Circuit Failure Rear Air Suspension Control Module REFER to Section 211-00 . C1722 Air Suspension Height Sensor Power Circuit Short to Power Rear Air Suspension Control Module GO to Pinpoint Test D . C1723 Air Suspension Height Sensor Power Circuit Short to Ground Rear Air Suspension Control Module GO to Pinpoint Test E . C1760 Air Suspension Rear Height Sensor High Signal Circuit Failure Rear Air Suspension Control Module GO to Pinpoint Test F . C1763 Air Suspension Rear Height Sensor High Signal Circuit Short to Ground Rear Air Suspension Control Module GO to Pinpoint Test G . C1765 Air Suspension Rear Height Sensor Low Signal Circuit Failure Rear Air Suspension Control Module GO to Pinpoint Test F . C1768 Air Suspension Rear Height Sensor Low Signal Circuit Short to Ground Rear Air Suspension Control Module GO to Pinpoint Test H . C1770 Air Suspension Vent Solenoid Output Circuit Failure Rear Air Suspension Control Module GO to Pinpoint Test I . C1773 Air Suspension Vent Solenoid Output Circuit Short to Ground Rear Air Suspension Control Module GO to Pinpoint Test J . C1790 Air Suspension LR Air Spring Solenoid Output Circuit Failure Rear Air Suspension Control Module GO to Pinpoint Test K . C1793 Air Suspension LR Air Spring Solenoid Output Circuit Short to Ground Rear Air Suspension Control Module GO to Pinpoint Test L . C1795 Air Suspension RR Air Spring Solenoid Output Circuit Failure Rear Air Suspension Control Module GO to Pinpoint Test M . C1798 Air Suspension RR Air Spring Solenoid Output Circuit Short to Ground Rear Air Suspension Control Module GO to Pinpoint Test N . C1813 Air Suspension Vent Request Exceeded Max Timing Rear Air Suspension Control Module GO to Pinpoint Test O . C1818 Air Suspension Air Compressor Request Exceeded Max Timing Rear Air Suspension Control Module GO to Pinpoint Test P . C1830 Air Compressor Relay Circuit Failure Rear Air Suspension Control Module GO to Pinpoint Test Q . C1832 Air Compressor Relay Circuit Short to Power Rear Air Suspension Control Module GO to Pinpoint Test R . C1840 Air Suspension Switch Circuit Failure Rear Air Suspension Control Module GO to Pinpoint Test S . C1842 Air Suspension Switch Circuit Short to Power Rear Air Suspension Control Module GO to Pinpoint Test D . C1897 Steering VAPS Circuit Loop Failure Rear Air Suspension Control Module REFER to Section 211-00 . U1041 SPC Invalid or Missing Data for Vehicle Speed