Circuit Description
The switch that failed and generated this diagnostic trouble code (DTC) is part of the driver door switch assembly (DDSA). The DDSA contains a microprocessor which takes the ground signal generated by this switch and assigns a digital message to it. The DDSA sends this message over the Serial Data Class 2 line to the left rear door module (LRDM) and the LRDM then supplies battery voltage and ground to the appropriate circuits of the left rear door power window motor to move the window Down.
Conditions for Running the DTC
The DDSA must be powered and cannot have DTCs B1327-Battery Low Voltage or B1328-Battery High Voltage set for this DTC to set.
Conditions for Setting the DTC
If the driver door switch assembly (DDSA) receives the message that the switch is grounded for more than 15 continuous seconds, the DDSA sets this DTC.
Action Taken When the DTC Sets
The DDSA ignores Down inputs from the switch for this window until it no longer detects the input , or, the ignition is cycled from OFF to RUN. The Window Up function will still operate.
Conditions for Clearing the DTC
| • | The DDSA clears the current code when it does not receive the input for 6 seconds. |
| • | Use the scan tool in order to clear the history code. |
| • | Use the On-Board diagnostics to clear the history code. |
Diagnostic Aids
A sticking 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 parameter change state? | -- | Go to Diagnostic Aids | Go to Step 4 |
4 | Inspect for poor connections/terminal tension at the driver door switch assembly 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 6 | Go to Step 5 |
5 | Replace the driver door switch assembly. Refer to Front Door Switch Replacement . Did you complete the replacement? | -- | Go to Step 6 | -- |
6 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
