Question about 1996 Mazda MX-5 Miata

1 Answer

Fault code p1794

Diagnostic Trouble Codes (DTCs), p1794 battery power control circuit

Posted by on

  • Anonymous May 26, 2009

    i have the same code/problem how do u fix it and what do u do. I have the code comming up on my mazda mx3 96, P1794. dont really know what it means, hope someon can help, thanks.

×

1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 2 Answers

The correct eplanation for DTC P1794 is: Powertrain Control Module Battery Direct Power Circuit

Posted on Nov 17, 2008

  • wildthingn Mar 13, 2011

    how do you check it

×

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Crown vic trunk release doesn't work


Do you know if your door locks are module controlled or non module controlled ?
Locks, Latches and Entry Systems - Module Controlled
Principles Of Operation
s5a~tr~en~file=ani_caut.gif~gen~ref.gif CAUTION: Do not use a key, pencil or any other hard object to press the keyless entry keypad buttons. These objects may damage the keyless entry keypad buttons.
NOTE: The remote transmitter will not operate with the transmission in REVERSE or DRIVE.
NOTE: Upon installation of a new driver door module (DDM), the module must be reconfigured. Refer to Section 418-01 .
The DDM receives inputs from the digital transmission range (TR) sensor, ignition switch, brake switch, door lock control switches, lighting control module (LCM), keyless entry keypad and remote transmitter. The DDM outputs consists of keyless entry keypad illumination, door lock actuators, luggage compartment lid release solenoid, and LCM.
For DDM removal and installation information, refer to Section 419-10 .
Inspection and Verification
s5a~tr~en~file=ani_caut.gif~gen~ref.gif WARNING: If equipped with fire suppression system, refer to Section 419-03 for important safety warnings.
NOTE: Before starting electrical diagnosis, check for mechanical binds by manually operating the door locks. Operate lock system several times from each switch while observing the operation of all door locks. Be sure battery is fully charged.
  1. Verify the customer concern.
  1. Visually inspect for obvious signs of mechanical and electrical damage.
  2. Visual Inspection Chart Mechanical Electrical
    • Binding latches
    • Battery junction box (BJB) fuse 8 (20A)
    • Central junction box (CJB) fuse(s):
      • 10 (5A)
      • 18 (10A)
      • 25 (10A)
    • Circuitry
    • Connectors
    • Door lock actuator
    • Door lock control switch
    • Keyless entry keypad
    • Luggage compartment lid release switch
    • Luggage compartment lid release solenoid

    1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
    1. If the cause is not visually evident, connect the diagnostic tool to the data link connector and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
      • check that the program card is correctly installed.
      • check the connections to the vehicle.
      • check the ignition switch position.
    1. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool operating manual.
    1. Carry out the diagnostic tool data link test. If diagnostic tool responds with:
      • SCP or ISO circuit fault; all electronic control units no response/not equipped, refer to Section 419-10 .
      • No response/not equipped for the DDM, refer to Section 419-10 .
      • No response/not equipped for the LCM, refer to Section 419-10 .
      • System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out self-test diagnostics for the DDM and LCM.
    1. If the DTCs retrieved are related to the concern, go to the Driver Door Module (DDM) Diagnostic Trouble Code (DTC) Index or Lighting Control Module (LCM) Diagnostic Trouble Code (DTC) Index to continue diagnostics.
    1. If no DTCs related to the concern are retrieved, GO to Symptom Chart .
    Drive Door Module (DDM) Diagnostic Trouble Code (DTC) Index DTC Description Source Action B1352 Ignition Key In Circuit Failure DDM Go To Pinpoint Test H . B1396 Door Lock Circuit Short To Battery DDM Go To Pinpoint Test C . B1526 Keyless Entry Keypad Circuit Short To Ground DDM Go To Pinpoint Test E . B1553 Luggage Compartment Lid Release Circuit Short To Ground DDM Go To Pinpoint Test B . B1751 Park/Neutral Switch Circuit Short To Battery DDM Go To Pinpoint Test L . B2425 Remote Keyless Entry Out Of Synchronization DDM Go To Pinpoint Test M .
    Lighting Control Module (LCM) Diagnostic Trouble Code (DTC) Index
    DTC Description Source Action B1300 Door Lock Circuit Failure LCM Go To Pinpoint Test N . B1310 Door Unlock Circuit Failure LCM Go To Pinpoint Test N . B1396 Door Lock Circuit Short To Battery LCM Go To Pinpoint Test N . B1397 Door Unlock Circuit Short To Battery LCM Go To Pinpoint Test N . B1677 Alarm Panic Input Circuit Failure LCM Go To Pinpoint Test J . B1679 Alarm Panic Input Circuit Short To Battery LCM Go To Pinpoint Test J .
    NOTE: For a complete list of DDM and LCM DTCs, refer to Section 419-10 .
  3. ????????????? Do you have a professional scan tool ?
    ??

Sep 17, 2016 | 2005 Ford Crown Victoria

1 Answer

Power window wiring diagram for 1998 Lincoln town car


Go to http://bbbind.com/free_tsb.html free wiring diagrams !
  • Power Windows Completely Inoperative
  • Window regulator control switch.
  • Circuits open or shorted.
  • Window regulator electric drive.
  • Driver door module.
  • PERFORM Self Test to retrieve Diagnostic Trouble Codes. If no DTCs retrieved, GO to Pinpoint Test C .
  1. VISUAL INSPECTION CHART
  1. Mechanical
  2. Electrical
  • Front door power window regulator damaged.
  • Front window run damaged.
  • Front door window glass out of window run.
  • Front door window glass broken.
  • Lighting control module.
  • Driver door module.
  • Circuits open/shorted.
  • Loose, corroded connectors.
  • Damaged window regulator control switch.
  • Damaged window regulator electric drive.
  • Power distribution box Fuse D 40 for heated back window concern; Circuit Breaker 14 (20A), Circuit Breaker F (30A) or window regulator safety relay for power window concern.
  • Fuse junction panel Circuit Breaker 14 (20A), Fuses 6 (10A), 9 (5A), 15 (15A), Fuse 13 (10A), Fuse 4 (10A) or Circuit Breaker 12 (18A).
  • Scratched grid.

  1. If the inspection reveals obvious concerns that can be readily serviced, correct the concern before continuing with Inspection and Verification.
  1. If the concern remains after the inspection, connect the Rotunda New Generation Star (NGS) Tester, 007-00500 or equivalent, to the data link connector (DLC) located beneath the instrument panel to perform DATA LINK DIAGNOSTICS test. If the NGS responds with NO RESPONSE/NOT EQUIPPED for the driver door module, go to Pinpoint Test A . If the NGS responds with NO RESPONSE/NOT EQUIPPED for lighting control module, go to Pinpoint Test B . If the DATA LINK DIAGNOSTICS test is passed for the driver door module and lighting control module, retrieve continuous DTCs and execute self test diagnostics for the driver door module and lighting control module to retrieve current DTCs.
  1. If self test is passed and no DTCs are retrieved, go to Symptom Chart to continue diagnosis.
  1. If DTCs are retrieved for the driver door module, go to the Driver Door Module (DDM) Diagnostic Trouble Code (DTC) Index to continue diagnosis. If DTCs are retrieved for the lighting control module, go to the Lighting Control Module (LCM) Diagnostic Trouble Code (DTC) Index to continue diagnostics.
  1. If the driver door module cannot be accessed by the NGS tester, go to Pinpoint Test A . If the lighting control module cannot be accessed by the NGS, go to Pinpoint Test B .
Rotunda Service Bay Diagnostic System (SBDS®) 001-00001 may also be used to diagnose this system.
You'll need more then wiring diagrams ! A good scan tool for starters .
Youl

Aug 08, 2016 | Lincoln Cars & Trucks

1 Answer

Can you show me a schematic of the interior fuse box on a 2006 ford Taurus that tells what everything goes to and what's hot I'm trying to fix a power window


Sorry , but this to complex , it's computer controlled by the SJB - smart junction box ( microprocessor ) If you don't have a ford factory scan tool your not going to fix anything . It's low voltage signals over the serial data communication bus , if you don't know what this is suggest you google it .
Inspection and Verification
  1. Verify the customer concern.
  1. Visually inspect for obvious signs of mechanical or electrical damage.

    Visual Inspection Chart Mechanical Electrical
    • Door window regulator and motor
    • Door glass top run
    • Door window glass
    • Loose, corroded connectors
    • Circuitry
    • Window control switch
    • Battery junction box (BJB) fuse(s):
      • 1 (60A)
      • 3 (60A)
      • 11 (50A)
    • Smart junction box (SJB) fuse(s):
      • 7 (20A)
      • 27 (10A)
      • 30 (10A)
    • SJB circuit breaker 10 (30A)
    • SJB rear window defrost relay 1
    • Relay center box 1 rear window defrost relay 2
    • Delayed accessory relay
    • Battery saver relay
    • Rear window defrost grid
  1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  1. If the cause is not visually evident, connect the diagnostic tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
    • check that the program card is correctly installed.
    • check the connections to the vehicle.
    • check the ignition switch position.
  1. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool operating manual.
  1. Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
    • CAN circuit fault; all electronic control units no response/not equipped, refer to Section 418-00 .
    • No response/not equipped for SJB, go to Section 419-10 .
    • System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs, and carry out self test diagnostics for the SJB.
  1. If the DTCs retrieved are related to the concern, go to the Smart Junction Box (SJB) Diagnostic Trouble Code (DTC) Index.
  1. If no DTCs related to the concern are retrieved, GO to Symptom Chart to continue the diagnostics.
Your best bet is to take it to the dealer !

Feb 20, 2016 | Ford Cars & Trucks

1 Answer

Need to change fuse on remote keyless entry but don't where it's located on fuse box on 2004 explorer


Do any doors lock/unlock with remote keyless entry ?
  • The doors do not lock/unlock using the remote transmitter
  • Remote transmitter battery.
  • Remote transmitter.
  • Remote transmitter programming.
  • Aftermarket system.
  • High power devices.
  • TV/radio transmission towers.
  • Vehicle security module.
  • Go To Pinpoint Test C .
Pinpoint Test C: The Doors Do Not Lock/Unlock Using The Remote Transmitter
Normal Operation
Remote locking and unlocking of the doors is accomplished by the vehicle security module receiving a command message from the remote transmitter. The vehicle security module processes the command and sends a signal directly to the door lock actuators.
All remote transmitters must be present to begin diagnosis of the remote keyless entry (RKE) system.
Aftermarket or dealer-installed systems may adversely effect the RKE system operation. These systems should be disconnected before diagnosing any RKE concerns.
Visual Inspection Chart Mechanical Electrical
  • Latches
  • Battery junction box (BJB) fuse(s):
    • 2 (30A)
    • 16 (15A)
    • 22 (20A)
    • 29 (60A)
  • Central junction box (CJB) fuse 20 (5A)
  • Circuitry
  • Relays
  • Remote transmitter
  • Keyless entry keypad
  • Vehicle security module
  1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  1. If the cause is not visually evident, connect the diagnostic tool to the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
  • Check that the program card is correctly installed.
  • Check the connections to the vehicle.
  • Check the ignition switch position.
  1. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool operating manual.
  1. Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
    • SCP+, SCP- OR UBP circuits fault; all electronic control units no response/not equipped, refer to Section 418-00 .
    • No response/not equipped for vehicle security module, refer to Section 418-00 .
    • System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs, and carry out the self-test diagnostics for the vehicle security module.
  1. If the DTCs retrieved are related to the concern, go to the Vehicle Security Module Diagnostic Trouble Code (DTC) Index to continue diagnostics.
  1. If DTCs are retrieved that are not found in the following Vehicle Security Module Diagnostic Trouble Code (DTC) Index, refer to the Master Vehicle Security Module Diagnostic Trouble Code (DTC) Index in Section 418-00 .
  1. If no DTCs related to the concern are retrieved, proceed to the Symptom Chart to continue diagnostics.

Nov 18, 2015 | Cars & Trucks

1 Answer

2002 chevy silverado trys to stall in any condition sometime it will stall. all dash light will come on. starts right up.


Is check engine light Lit ? You should have all the computers on the vehicle check for DTC'S - diagnostic trouble codes ! Check the battery an all connections !
Diagnostic Starting Point - Engine Electrical
Begin the system diagnosis with the Diagnostic System Check - Engine Electrical . The Diagnostic System Check will provide the following information:
?€¢
The identification of the control module(s) which command the system.


?€¢
The ability of the control modules to communicate through the serial data circuit.


?€¢
The identification of any stored diagnostic trouble codes (DTCs) and their status.

The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.
Diagnostic System Check - Engine Electrical
Test Description
The numbers below refer to the step numbers on the diagnostic table.
Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition.
The symptom list in Symptoms will determine the correct diagnostic procedure to use.
The presence of DTCs which begin with "U" indicate some other module is not communicating. The specified procedure will compile all the available information before tests are performed.
Step
Action
Yes
No

1
Did you perform the Battery Inspection/Test?
Go to Step 2
Go to Battery Inspection/Test

2
Install a scan tool.
Does the scan tool power up?
Go to Step 4
Go to Scan Tool Does Not Power Up in Data Link Communications

3
Important: The engine may start during the following step. Turn OFF the engine as soon as you have observed the Crank power mode.
Access the Class 2 Power Mode in the Diagnostic Circuit Check on the scan tool.
Rotate the ignition switch through all positions while observing the Class 2 Power Mode on the Scan Tool. Refer to the Serial Data Power Mode table within the Body Control System Description and Operation in Body Control System for a list of the power mode states that correspond to each ignition switch position.
Does the Class 2 Power Mode parameter reading match the ignition switch position for all the selected positions?
Go to Step 4
Go to Power Mode Mismatch in Body Control System

4
Turn ON the ignition, with the engine OFF.
Attempt to communicate with each module on the class 2 serial data circuit:
• The body control module (BCM)
• The driver information center (DIC)
• The instrument panel cluster (IPC)
• The powertrain control module (PCM)
Does the scan tool communicate with any module on the class 2 serial data circuit?
Go to Step 5
Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications

5
Select the Display DTCs function for each module. If using a Tech 2, use the Class 2 DTC Check feature in order to determine which modules have DTCs set.
Record all of the displayed DTCs the DTC status and the module which set the DTC.
Does the scan tool display any DTCs?
Go to Step 6
Go to Symptoms - Engine Electrical

6
Does the scan tool display any DTC beginning with "U"?
Go to Diagnostic Trouble Code (DTC) List in Data Link Communications
Go to Step 7

7
Does the scan tool display any DTC beginning with "B"?
Go to Diagnostic Trouble Code (DTC) List in Body Control Systems
Go to Diagnostic Trouble Code (DTC)

Oct 28, 2015 | Cars & Trucks

1 Answer

Dome lights stay on all the time


Hey Rich how's it going ? What make , model an year vehicle do you have ? On vehicles after 1996 light functions are control by a control module , Body control module for GM vehicles , GEM - generic electronic module an smart junction box for Ford vehicles an Chryslers have central timer modules or upfront modules or now they have totally intergraded power module . These modules receive an input from a door switch or the switch on the dash ! anything is possible with these systems ! Do you have a symbol of a car on the dash showing a door open when it's not ? A door ajar message ? I have my Ford service info open on my lap top , was check out a problem on ford explorer , have a description on GEM .
Detecting Faults in the GEM Output Circuits
Battery shorts can only be detected when the device being controlled is actuated (e.g., relays, lamps or solenoids). All faults are monitored continuously during the vehicle operation. Reporting Trouble Codes
Faults are displayed after the continuous DTCs and the On-Demand DTCs are retrieved. Continuous DTCs should be retrieved from the GEM before an On-Demand Self Test is run. These DTCs are then compared against the diagnostic trouble codes retrieved after running an On-Demand Self Test. .
An a code reader for check engine lights won't work for these systems !
A code

Mar 20, 2015 | Cars & Trucks

1 Answer

I have a couple of check engine light codes that came up. p0456, p0700, p1794. what are these and are they in anyway related to each other. does anyone have any solutions besides going to a dealer or...


P0456 A small Evaporative Emission Control System leak has been detected P0700 Transmission Control System Malfunction P1794 is: Powertrain Control Module Battery Direct Power Circuit

Now, what can we find from all of these.....the first one p0456...mostly refers to improper sealing of the gas cap, so replace this fairly cheap....
now 0700 normally refers to a transmissioin fault..but the third one p1794 refers to battery power...so I would be first checking to see if battery charging system is functioning correctly.....a charging rate at idel should be 13.8-14.4v......as the 0700 code could be related to this issue.....check the transmission fluid.......should be cherry red, not smell burnt or brown.......is this car regularly serviced.......if so, what does the vehilce do that leads you to think there might be a problem....apart from the engine light.....

Lastly, these codes may not be current ones, but maybe you started the car with the gas cap off, for instance and it logged this code..so see if you can clear them, and see what remains behind.

Aug 26, 2010 | 2003 Dodge Durango

2 Answers

No heat coming out fan blows but no heat


there's a blend door actuator behind the dash. they are going bad all the times. however, check your coolant level first.

Feb 28, 2010 | 1996 Lincoln Town Car

1 Answer

Airbag light on. flashing 5 times 2 times then stays on


I think you have a false code stored due to your work. clear the code and you should be ok.
If the air bag indicator does not illuminate or the indicator stays on or flashes at any time, a fault has been detected by the air bag diagnostic monitor.
Diagnostic trouble codes (DTCs) may not be displayed for approximately 30 seconds after the ignition switch is placed in the RUN position. This is the amount of time the air bag diagnostic monitor requires to perform all tests and verify system faults.
Each DTC (a series of flashes and pauses of the air bag indicator):
  • Represents a two-digit number.
  • Is always displayed at least twice.
If the diagnostic monitor detects a fault in the air bag system, a diagnostic trouble code (DTC) will be written to the diagnostic monitor's Non-Volatile RAM (NVRAM). This DTC will then cause the lamp to flash a lamp fault code (LFC) on the air bag warning lamp and can be retrieved with the New Generation STAR (NGS) tester. After servicing the DTC may then be cleared from the NVRAM.
If a system fault is present and the air bag indicator is malfunctioning, an audible tone will be heard. The tone is a series of five sets of five beeps. If the tone is heard, the air bag system needs attention.
If a fault exists that makes unwanted air bag deployment possible, the air bag diagnostic monitor will attempt to remove deployment power by turning on a solid state switch to blow the 10A battery fuse.

If the 10A battery fuse has successfully been blown by the air bag diagnostic monitor, the air bag diagnostic monitor will not attempt to blow it again until the proper fault has been repaired and cleared (refer to Diagnostic Instructions). The air bag diagnostic monitor will store both the unwanted deployment diagnostic trouble code and the loss of deployment power diagnostic trouble code. The loss of deployment power diagnostic trouble code is the highest priority.
If a fault exists that makes unwanted air bag deployment possible, the air bag diagnostic monitor has an internal fuse that that will blow (open) automatically. This removes all power to the air bag deployment circuit.
DTCs are prioritized numerically. If two or more faults occur at the same time, the fault having the highest priority will be displayed first. After that fault has been corrected, the next highest priority fault will be displayed.
The air bag diagnostic monitor includes an internal backup power supply. This feature provides sufficient backup power to deploy the air bag in the event the battery (10655) or battery cables are damaged in a collision before safing and air bag sensors close. The backup power supply will deplete its stored energy approximately one minute after the positive battery cable is disconnected.
---------------------------------------------------------------
Once a DTC is logged into the air bag diagnostic monitor memory, it will stay in memory until 80 key cycles have been recorded or until the NGS is used to erase the DTCs. Once 256 key cycles have been recorded since the concern was last detected, the DTC will automatically be removed from memory.
--------------------------------------------------------------
Active Command Modes
This command allows the technician to verify operation of the air bag system, indicator and tone. When the air bag output command is executed, the indicator and the tone are simultaneously activated for approximately four seconds. Both devices are automatically deactivated.


Air Bag Diagnostic Monitor DTC Priority Table DTC LFC Description Action To Take B1342 24 Air bag diagnostic monitor is faulted (retrieved only during On-Demand Self Test) GO to Pinpoint Test P . B1867 12/52 Lost or low battery voltage GO to Pinpoint Test A . B1869 — No air bag indicator — inoperative indicator circuit GO to Pinpoint Test R . B1913 13/53 Air bag circuit shorted to ground — driver/passenger GO to Pinpoint Test B . B1914 14/54 Air bag sensor circuit shorted to ground GO to Pinpoint Test C . B1921 21 Air bag diagnostic monitor ground circuit open or not mounted to the vehicle properly GO to Pinpoint Test D . B1922 22 Safing sensor output circuit shorted to battery voltage GO to Pinpoint Test E . B1924 24 System disarm fault GO to Pinpoint Test P . B1932 32 Driver side air bag module circuit high resistance or open GO to Pinpoint Test F . B1933 33 Passenger side air bag module circuit high resistance or open GO to Pinpoint Test G . B1934 34 Driver side air bag module circuit low resistance or shorted GO to Pinpoint Test H . B1935 35 Passenger side air bag module circuit low resistance or shorted GO to Pinpoint Test J . B1941 41 RH air bag sensor feed/return circuit open GO to Pinpoint Test K . B1942 42 LH air bag sensor feed/return circuit open GO to Pinpoint Test L . B1944 44 RH air bag sensor not mounted to the vehicle properly or ground circuit open GO to Pinpoint Test M . B1945 45 LH air bag sensor not mounted to the vehicle properly or ground circuit open GO to Pinpoint Test N .
DTC - Diagnostic Trouble Code, retrieved using New Generation STAR (NGS) Tester.
LFC - Lamp Fault Code, flashed on air bag indicator.

May 21, 2009 | 1997 Ford F150 Regular Cab

Not finding what you are looking for?

Open Questions:

See all 1996 Mazda MX-5 Miata Questions

1996 Mazda MX-5 Miata Logo

Related Topics:

1,434 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mazda Experts

yadayada
yadayada

Level 3 Expert

60541 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21927 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6811 Answers

Are you a Mazda Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...