B1802-DRIVER DOOR LOCK/UNLOCK SWITCH CIRCUIT HIGH - DRIVER DOOR MODULE
For a complete wiring diagram Refer to Section 8W.
- When Monitored:
Continuously
- Set Condition:
When the Door Lock Switch Mux circuit is above 5.25 volts for over 30 msec.
| Possible Causes |
| (G161) (LHD) LEFT DOOR LOCK SWITCH MUX WIRE SHORT TO VOLTAGE |
| (G160) (RHD) RIGHT DOOR LOCK SWITCH MUX WIRE SHORT TO VOLTAGE |
| (P439) MEMORY SELECT SWITCH MUX WIRE SHORT TO VOLTAGE |
| DRIVER WINDOW/DOOR LOCK SWITCH |
| DRIVER DOOR MODULE |
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.
Diagnostic Test
1. TEST FOR INTERMITTENT CONDITIONWith the scan tool, record and erase DTC's
Operate the Driver Door Lock Switch in both positions several times.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read DTC's.
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 BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
2. DRIVER DOOR LOCK SWITCH SHORTED TO VOLTAGE
With the scan tool, erase DTC's.
Disconnect the Driver Window/Door Lock Switch C2 connector.
Turn the ignition on.
With the scan tool, read DTC's.
Does the scan tool display DRIVER DOOR LOCK/UNLOCK SWITCH CIRCUIT HIGH?
No
- Replace the Driver Window/Door Lock Switch.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
Yes
- Go to 3
3. (G160) OR (G161) DOOR LOCK SWITCH MUX WIRE SHORT TO VOLTAGE
Disconnect the Driver Door Module C2 connector.
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 BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Go to 4
4. VEHICLE EQUIPPED WITH MEMORY SYSTEM?
Is this vehicle equipped with the Memory System?
No
- Replace the Driver Door Module in accordance with service information.
- Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
Yes
- Go to 5
5. (P439) MEMORY SELECT MUX WIRE SHORT TO VOLTAGE
Disconnect the Driver Door Module C3 connector.
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 - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Replace the Driver Door Module in accordance with service information.
- Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)