GM Service Manual Online
For 1990-2009 cars only

Refer to:

    • 

LH Middle Door Power Door Lock (w/V4U)


Object Number: 525871  Size: FS
Power Door Systems Components
Power Door Locks Circuit Description
LH Rear Door Power Door Lock
Driver Door Power Door Lock
Handling ESD Sensitive Parts Notice
Data Link Connector Schematics
LH Middle Door Power Window
    • 

LH Rear Door Power Door Lock


Object Number: 491483  Size: FS
Power Door Systems Components
Power Door Locks Circuit Description
Passenger Front Door Power Door Lock
LH Middle Door Power Door Lock (w/V4U)
Handling ESD Sensitive Parts Notice
Data Link Connector Schematics
LH Power Windows
Rear Door Dimming
    • 

Passenger Front Door Power Door Lock


Object Number: 491484  Size: FS
Power Door Systems Components
Power Door Locks Circuit Description
Passenger Front Door Power Door Lock w/ B9Q
LH Rear Door Power Door Lock
Handling ESD Sensitive Parts Notice
Passenger Front Door Power Door Lock w/ B9Q
Passenger Front Door Power Door Lock w/ B9Q
Serial Data Class 2 (2 of 3)
RH Power Windows
Front Door Dimming
    • 

Passenger Front Door Power Door Lock w/ B9Q


Object Number: 491486  Size: FS
Power Door Systems Components
Power Door Locks Circuit Description
RH Middle Door Power Door Lock (w/ V4U)
Passenger Front Door Power Door Lock
Passenger Front Door Power Door Lock
Passenger Front Door Power Door Lock
PWR WDO Circuit Breaker
G201 - Steering Column CKT 451
    • 

RH Middle Door Power Door Lock (w/ V4U)


Object Number: 525872  Size: FS
Power Door Systems Components
Power Door Locks Circuit Description
Right Rear Door Power Door Lock (w/o B9Q)
Passenger Front Door Power Door Lock w/ B9Q
Handling ESD Sensitive Parts Notice
Serial Data Class 2 (2 of 3)
RH Middle Door Power Window
    • 

Right Rear Door Power Door Lock (w/o B9Q)


Object Number: 491487  Size: FS
Power Door Systems Components
Power Door Locks Circuit Description
Power Door Locks ( Middle Door Release w/V4U)
RH Middle Door Power Door Lock (w/ V4U)
Handling ESD Sensitive Parts Notice
Serial Data Class 2 (2 of 3)
RH Power Windows
Rear Door Dimming

Circuit Description

The switch that failed and generated this diagnostic trouble code (DTC) is one of the switches wired to the passenger front door module (PFDM), left rear door module (LRDM), or right rear door module (RRDM) and mounted locally, one in each passenger door. The PFDM, LRDM, or RRDM each contain a microprocessor which takes the signal generated by its switch and assigns a digital message to it. The PFDM, LRDM, or RRDM then sends this message over the Serial Data Class 2 line to the rear integration module (RIM), which is the master of all lock operations. If the RIM determines that the message is a valid request, it sends its OK back, via the Class 2 line to the door modules. Each door module then supplies power and ground to its associated lock actuator to Lock the doors.

Conditions for Running the DTC

The PFDM, LRDM, or RRDM must be powered and can not have B1327-Battery Voltage Low or B1328-Battery Voltage High set for this DTC to set.

Conditions for Setting the DTC

If the PFDM, LRDM or RRDM detects that a switch is closed for more than 30 continuous seconds it sets this DTC.

Action Taken When the DTC Sets

The PFDM, LRDM, and RRDM ignore inputs from this switch and prevent the doors from locking until the input is no longer received.

Conditions for Clearing the MIL/DTC

The PFDM, LRDM, or RRDM clears this DTC when the switch signal is not received for a time period of 600 milliseconds, or, when the ignition is cycled from OFF to RUN.

Diagnostic Aids

A sticking or binding switch can cause this DTC to set.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. Checks the existing state of the applicable passenger door lock switch by using the current state of the input parameter.

Step

Action

Value(s)

Yes

No

1

Did you perform A Diagnostic System Check - Power Door Systems?

--

Go to Step 2

Go to Diagnostic System Check - Power Door Systems

2

  1. Install a scan tool.
  2. Turn ON the ignition with the engine OFF.
  3. With the scan tool, observe the Door Lock Switch parameter in the applicable Door Module Inputs list.

Does the scan tool display Idle?

--

Go to Step 3

Go to Step 4

3

  1. Activate the applicable door lock switch.
  2. With the scan tool, observe the Door Lock Switch parameter.

Does the Door Lock Switch parameter change state?

--

Go to Diagnostic Aids

Go to Step 4

4

  1. Turn OFF the ignition.
  2. Disconnect the applicable door lock switch harness connector.
  3. Turn ON the ignition with the engine OFF.
  4. With the scan tool, observe the Door Lock Switch parameter in the applicable Door Module Inputs list.

Does the scan tool indicate the Idle state?

--

Go to Step 7

Go to Step 5

5

Test the applicable lock switch Lock input circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 10

Go to Step 6

6

Inspect for poor connections/terminal tension at the applicable door module harness connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 10

Go to Step 8

7

Inspect for poor connections/terminal tension at the applicable door lock switch harness connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 10

Go to Step 9

8

Replace the applicable door module. Refer to Door Control Module Replacement .

Did you complete the replacement?

--

Go to Step 10

--

9

Replace the applicable door lock switch. Refer to Door Lock Switch Replacement .

Did you complete the replacement?

--

Go to Step 10

--

10

  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC reset?

--

Go to Step 2

System OK