Circuit Description
The switch that failed and generated this diagnostic trouble code (DTC) is wired to the driver door module (DDM). The DDM includes the switch state in a Serial Data Class 2 message that it sends to the rear integration module (RIM), which is the master of all lock operations. If the RIM determines that the Unlock request is a valid request, it sends its OK back to each door module to unlock the doors.
Conditions for Running the DTC
The DDM 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 DDM, detects that the circuit is closed for more than 30 continuous seconds in the unlock position, it sets the DTC.
Action Taken When the DTC Sets
The DDM ignores inputs from this switch and stops sending messages for it.
Conditions for Clearing the DTC
The DDM clears this DTC when the switch signal is not received during one of the checks of the circuit for 600 milliseconds, or when the vehicle ignition status changes from OFF to Run.
Diagnostic Aids
A sticking key cylinder unlock switch can cause this DTC to set.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Door Systems Diagnostic System Check? | -- | Go to Step 2 | |
2 |
Does the scan tool display OFF? | -- | Go to Step 3 | Go to Step 4 |
3 |
Does the Key Cylinder Unlock parameter change state? | -- | Go to Diagnostic Aids | Go to Step 4 |
4 |
Does the scan tool display OFF? | -- | Go to Step 7 | Go to Step 5 |
5 | Test the driver door key cylinder 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 driver 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 driver door key cylinder unlock 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 driver door control module. Refer to Door Control Module Replacement . Did you complete the replacement? | -- | Go to Step 10 | -- |
9 | Replace the driver door key cylinder unlock switch. Refer to Door Lock Cylinder Replacement . Did you complete the replacement? | -- | Go to Step 10 | -- |
10 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
