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P0657 actuator supply voltage circuit open - Fusion Ford Cars & Trucks

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08 avalanche power steps have no power fuse good


Do you know there is a electronic control module for the power steps ? assist step control module !

Circuit/System Description
The assist step control module (ASC) controls the assist step actuators to extend or retract the assist steps. Each actuator consists of an electric motor and a potentiometer. The module supplies a low reference and 10-volt reference source voltage to the potentiometer. The ASC module monitors the voltage drop across the potentiometer on the position signal circuit. When the actuator shaft rotates, the voltage on the position signal circuit changes. The ASC module supplies the actuator motor with a 12-volt control circuit and a ground control circuit. The ASC module controls the direction of the actuator by changing the polarity of the control circuits.

Do you know how to test electric circuits with a DVOM ?
Circuit/System Testing
ASC Disable Switch Circuit Test
Ignition OFF, disconnect the harness connector at the IP multifunction switch.
Test for less than 10 ohms between the listed ground circuit terminal and ground.
• X88/Z88 Terminal 3
• Z75 terminal 1
? If greater than the specified range, test the ground circuit for an open/high resistance.
Ignition ON, verify the scan tool ASC Disable Switch parameter is Inactive.
? If not the specified value, test the signal circuit terminal 9 for a short to ground. If the circuit tests normal, replace the ASC module.
Install a 3A fused jumper wire between the signal circuit terminal 9 and ground. Verify the scan tool ASC Disable Switch parameter is Active.
? If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the ASC module.
If all circuits test normal, test or replace the IP multifunction switch.
ASC Actuator Circuit Test
Ignition OFF, disconnect the harness connector at the appropriate actuator.
Scan tool disconnected, test for less than 20 ohms between the low reference circuit terminal C and ground.
? If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ASC module.
Ignition ON, command the appropriate actuator with a scan tool while using the DMM Min/Max function to capture voltage. Test for greater than 9 volts between the 10-volt reference circuit terminal D and ground.
? If less than the specified range, test the 10-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ASC module.
Command the appropriate actuator with a scan tool while using the DMM Min/Max function to capture voltage. Test for greater than 9 volts between the signal circuit terminal E and ground.
? If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ASC module.
Using a scan tool, command the appropriate actuator both directions while using the DMM Min/Max function to capture voltage. Test for greater than 2 volts between the control circuit terminal A and ground.
? If less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ASC module.
Using a scan tool, command the appropriate actuator both directions while using the DMM Min/Max function to capture voltage. Test for greater than 2 volts between the control circuit terminal B and ground.
? If less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ASC module.
If all circuits test normal, replace the ASC actuator.

Nov 24, 2016 | Cars & Trucks

1 Answer

Code p2118


DESCRIPTION

The ETCS (Electronic Throttle Control System) has a dedicated power supply circuit. The voltage (+BM)

is monitored and when it is low (less than 4 V), the ECM determines that there is a malfunction in the

ETCS and cuts off the current to the throttle actuator.

When the voltage becomes unstable, the ETCS itself becomes unstable. For this reason, when the

voltage is low, the current to the throttle actuator is cut. If repairs are made and the system returns to

normal, turn the ignition switch OFF. The ECM then allows the current to flow to the throttle actuator so

that it can be restarted.

HINT:

The ETCS does not use a throttle cable.

MONITOR DESCRIPTION

The ECM monitors the battery supply voltage applied to the throttle actuator.

When the power supply voltage (+BM) drops below 4 V for 0.8 seconds or more, the ECM interprets this

as an open in the power supply circuit (+BM). The ECM illuminates the MIL and sets the DTC.
If the malfunction is not repaired successfully, the DTC is set 5 seconds after the engine is next started.

Jun 27, 2016 | Cars & Trucks

1 Answer

Need to replace the liftgate switch, where can I get instructions to do that?


How do you know it need's a switch ?
Rear Hatch/Gate Description and Operation
The lift gate can be opened by operating the switch on the instrument panel. Battery voltage is supplied to the lift gate actuator through the body control module (BCM). The BCM will pulse the lift gate actuator when a release input is received through the key fob, or the instrument panel switch. Did you test voltages ? Check for BCM DTC'S - diagnostic trouble codes ?
Circuit/System Description
The lift gate switch is an input to the body control module (BCM). The BCM supplies battery voltage to the signal circuit and when the lift gate switch is activated the signal circuit voltage goes low. The BCM controls the lift gate release actuator assembly through the LIFTGATE relay. When the lift gate switch signal is activated, the BCM enables the LIFTGATE relay by applying battery voltage to the lift gate relay circuit and the relay is energized when the BCM grounds the LIFTGATE relay control circuit. When the relay is energized battery voltage is supplied to the lift gate release actuator assembly through the lift gate release actuator control circuit.

May 29, 2016 | 2008 Pontiac Torrent

1 Answer

Why 2006 Malibu door locks quit working but when put in gear they work


No ,it's not the actuators . It could be the BCM - body control module.

How to test computer controlled door locks
Each door lock switch is wired to the body control module (BCM) through a separate door lock/unlock signal circuit. While these circuits are separated between the BCM and respective door lock switch, they are connected into a single circuit within the BCM. The BCM supplies voltage through the door lock/unlock signal circuits to each door lock switch. When either door lock switch is operated, this supply voltage is pulled to ground, providing the BCM with the required lock or unlock signal. In order for the BCM to distinguish between a lock and unlock signal, the lock switch contains two separate paths for this voltage to flow to the same body ground. When the switch is operated to the unlock position, the supply voltage flows to ground through a 1.5 K ohm resistor. When the switch is operated to the lock position, the supply voltage flows to ground through a different part of the switch circuit, which has no resistor. The BCM then interprets the flow of voltage as a lock or unlock request and powers the door lock actuators to the appropriate lock or unlock position.
The BCM powers the reversible door latch assemblies by providing battery positive voltage and ground to the appropriate lock and unlock control circuits of the door latch assemblies. The Lock control circuits of the driver and passenger door latch assemblies are all connected together; however, the Unlock control circuits are connected in a slightly different way. While the unlock control circuits for the passenger door latch assemblies are connected together, the door latch assembly has a separate unlock control circuit. The system is designed this way so that the keyless entry transmitter may be used to unlock only the driver door. Despite this difference, all of the lock actuators perform much the same way. When the door latch assemblies are not active, all actuator Lock and Unlock control circuits are at ground potential within the BCM. Transitioning of the lock actuators to the lock or unlocked position depends upon which control circuits receive voltage and which control circuits receive ground.

Nov 27, 2015 | 2006 Chevrolet Malibu

1 Answer

The running bords on my 2008 Yukon stop working


Circuit/System Description
The assist step control module (ASC) controls the running board actuators to extend or retract the running boards. Each actuator consists of an electric motor and a potentiometer. The module supplies a low reference and 10-volt reference source voltage to the potentiometer. The ASC control module monitors the voltage drop across the potentiometer on the position signal circuit. When the actuator shaft rotates, the voltage on the position signal circuit changes. The ASC control module supplies the actuator motor with a 12-volt control circuit and a ground control circuit. The ASC module controls the direction of the actuator by changing the polarity of the control circuits.
You should take this to a ASE certified repair shop that has the diagnostic tools to check for stored DTC'S in the running board control module . A code reader for check engine light codes will not work for this system !
This system can set numerous DTC'S
?€¢
Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors
DTC B051A 0B: Left Side Assist Step Motor Control Circuit Current Above Threshold

DTC B051A 01: Left Side Assist Step Motor Control Circuit Short to Battery

DTC B051A 02: Left Side Assist Step Motor Control Circuit Short to Ground

DTC B051A 04: Left Side Assist Step Motor Control Circuit Open Circuit

DTC B051B 0B: Right Side Assist Step Motor Control Circuit Current Above Threshold

DTC B051B 01: Right Side Assist Step Motor Control Circuit Short to Battery

DTC B051B 02: Right Side Assist Step Motor Control Circuit Short to Ground

DTC B051B 04: Right Side Assist Step Motor Control Circuit Open Circuit

DTC B051C 01: 10 V Reference Circuit Short to Battery

DTC B051C 02: 10 V Reference Circuit Short to Ground

DTC B051C 2A: Left Side Assist Step Position Sensor Circuit Too Many Pulses

DTC B051C 22: Left Side Assist Step Position Sensor Circuit Low Time < Minimum

DTC B051C 29: Left Side Assist Step Position Sensor Circuit Too Few Pulses

DTC B051C 62: Left Side Assist Step Position Sensor Circuit Actuator Stuck Open

DTC B051C 63: Left Side Assist Step Position Sensor Circuit Actuator Stuck Closed

DTC B051D 2A: Right Side Assist Step Position Sensor Circuit Too Many Pulses

DTC B051D 22: Right Side Assist Step Position Sensor Circuit Low Time < Minimum

DTC B051D 29: Right Side Assist Step Position Sensor Circuit Too Few Pulses

DTC B051D 62: Right Side Assist Step Position Sensor Circuit Actuator Stuck Open

DTC B051D 63: Right Side Assist Step Position Sensor Circuit Actuator Stuck Closed
If you don't know how the system works you could make it worst !
You

Aug 16, 2015 | Cars & Trucks

1 Answer

I have a 2008 Pontiac Vibe Error Code P0657 what is this problem and how to fix thanks


DTC P0657 Solenoid Control High Circuit Group 1

The DTC P0657 sets when the powertrain control module (PCM) has determined that the control module has an internal fault in the ignition voltage supply circuit 1. The PCM performs continuous self checks of all internal circuits. The PCM provides ignition positive voltage to the throttle actuator control (TAC) motor on circuit 1. The DTC P0657 diagnostic monitors the internal voltage of circuit 1.

Sounds to me like the Powertrain Control Mudule may have an internal fault. My suggestion to you would be to take it to the dealer where they have the proper scan tool that enables them to monitor the freeze frame data of the PCM to determine if the PCM needs to be replaced or possibly reflashed.

Hope this helps...

Sep 15, 2011 | Pontiac Vibe Cars & Trucks

1 Answer

P1109 error code


DTC P1109 Secondary Port Throttle System

Did you get a subcode?
-0F Swirl Actuator Malfunction
-08 Swirl Actuator Supply Voltage Range/Performance
-05 Swirl Actuator Feedback Circuit High Voltage
-02 Swirl Actuator Feedback Circuit Low Voltage
-29 Swirl Actuator Feedback Signal Malfunction
-28 Swirl Actuator Feedback Signal Malfunction
-21 Swirl Actuator Feedback Signal Range/Performance
-54 Swirl Actuator Feedback Powerstage High Temperature

Oct 29, 2010 | 2004 Saab 9-3

1 Answer

07 corolla will not accelerate code p0657 . I have replaced the electronic tps foot pedal so far. It goes a day or so then no accl.


hi

p0657 Actuator Supply Voltage Circuit / Open

please clear DTC by intellegent tester then if the trouble code not clear

replace ECM

Jul 02, 2009 | Toyota Corolla Cars & Trucks

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