Refer to:
Circuit Description
The switch that failed and generated this diagnostic trouble code (DTC) is wired to a passenger door module. Each passenger door module contains a microprocessor which takes the signal generated by its switch and assigns a digital message to it. Each passenger door module 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 all of the door modules. Each door module then supplies power and ground to its associated lock actuator to Unlock the doors. It should be noted that no Unlock circuits for the rear door lock switches are provided, except with the Limousine (V4U). Therefore, the doors on a non-limousine vehicle can only be Unlocked using the driver door lock switch, or the passenger front door lock switch.
Conditions for Running the DTC
The passenger door module 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 passenger door module detects that it's associated switch is closed for more than 30 continuous seconds it sets this DTC.
Action Taken When the DTC Sets
The passenger door module ignores inputs from this switch and prevents Unlocking the doors from it until the input is no longer received.
Conditions for Clearing the MIL/DTC
The passenger door module 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.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform A Diagnostic System Check - Power Door Systems? | -- | Go to Step 2 | |
Does the scan tool display Idle? | -- | Go to Step 3 | Go to Step 4 | |
3 |
Does the Door Lock Switch parameter change state? | -- | Go to Diagnostic Aids | Go to Step 4 |
4 |
Does the scan tool indicate the Idle state? | -- | Go to Step 7 | Go to Step 5 |
5 | Test the applicable passenger door lock switch Unlock 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 passenger 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 passenger 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 passenger door module. Refer to Door Control Module Replacement . Did you complete the replacement? | -- | Go to Step 10 | -- |
9 | Replace the applicable passenger door lock switch. Refer to Door Lock Switch Replacement . Did you complete the replacement? | -- | Go to Step 10 | -- |
10 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
