B1802

B1802-DRIVER DOOR LOCK/UNLOCK SWITCH CIRCUIT HIGH





For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
Continuously

- Set Condition:
When the Door Lock Switch Mux circuit is above 5.25 volts for over 30 msec.





Theory of Operation

If this vehicle is equipped with the Memory System, the supply circuit for the Memory Mirrors are supplied by the Driver Door Module. Therefore, both the Memory Select Switch Mux or the Door Lock Switch Mux circuits can cause this DTC to set.

1. TEST FOR INTERMITTENT CONDITION
1. With the scan tool, record and erase the DTCs.
2. Operate the Driver Door Lock Switch in both positions several times.
3. Cycle the ignition from on to off three times.
4. Turn the ignition on.
5. With the scan tool, read the DTCs.

Does the scan tool display B1802-DRIVER DOOR LOCK/UNLOCK SWITCH CIRCUIT HIGH?

Yes

- Go To 2

No

- The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. DRIVER DOOR LOCK SWITCH SHORTED TO VOLTAGE




1. With the scan tool, erase the DTCs.
2. Disconnect the Driver Window/Door Lock Switch C2 connector.
3. Turn the ignition on.
4. With the scan tool, read the DTCs.

Does the scan tool display DRIVER DOOR LOCK/UNLOCK SWITCH CIRCUIT HIGH?

No

- Replace the Driver Window/Door Lock Switch.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

Yes

- Go To 3

3. (G160) OR (G161) DOOR LOCK SWITCH MUX WIRE SHORT TO VOLTAGE




1. Disconnect the Driver Door Module C2 connector.
2. Measure the voltage between ground and the (G160) or (G161) Door Lock Switch Mux circuit in the Door Module C2 connector.

Is there any voltage present?

Yes

- Repair the (G160) or (G161) Left/Right Door Lock Switch Mux circuit for a short to voltage.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 4

4. VEHICLE EQUIPPED WITH MEMORY SYSTEM?

Is this vehicle equipped with the Memory System?

No

- Replace the Driver Door Module.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

Yes

- Go To 5

5. (P439) MEMORY SELECT MUX WIRE SHORT TO VOLTAGE




1. Disconnect the Driver Door Module C3 connector.
2. Measure the voltage between ground and the (P439) Memory Select Switch Mux circuit.

Is there any voltage present?

Yes

- Repair the (P439) Memory Select Switch Mux wire for a short to voltage.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the Driver Door Module.
- Perform the BODY VERIFICATION TEST. Body Verification Test.