B1802

B1802, B1807 DOOR LOCK/UNLOCK SWITCH CIRCUIT HIGH - MEMORY MIRROR MODULE

B1802, B1807 Door Lock/Unlock Switch Circuit High - Memory Mirror Module:

WHEN MONITORED
Continuously.

SET CONDITION
When the Door Lock Switch Mux circuit is above 5.25 volts for over 30 msec.

POSSIBLE CAUSES
- (G160, G161) Door lock switch MUX wire short to voltage
- (P339) Memory select switch MUX wire short to voltage
- Window/door lock switch
- Memory mirror module

Theory of operation
This code will only set in vehicles that have the Memory System. The supply circuit for the Memory Mirrors are supplied by the Memory Mirror Module, therefore both the Memory Select Switch Mux or the Door Lock Switch Mux circuits can cause this DTC.

Diagnostic Test

1. TEST FOR INTERMITTENT CONDITION

With the scan tool, record and erase DTC's
Operate the Door Lock Switch from the side this DTC was set in. Put the switch in both positions several times.
Cycle the ignition from on to off three times.
Turn the ignition on.
With the scan tool, read DTC's.

Q: Does the scan tool display 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. Body Verification Test

2. DOOR LOCK SWITCH SHORTED TO VOLTAGE




With the scan tool, erase DTC's.
Disconnect the appropriate Window/Door Lock Switch connector.
Turn the ignition on.
With the scan tool, read DTC's.

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

NO: Replace the Window/Door Lock Switch. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
YES: Go To 3

3. DRIVER MODULE OR PASSENGER MODULE

Q: Is this DTC in the Driver or Passenger module?

Passenger
Go To 4

Driver
Go To 5

4. (G160) PASSENGER DOOR LOCK SWITCH MUX CIRCUIT SHORT TO VOLTAGE




Disconnect the Passenger Memory Mirror Module connector.
Measure the voltage of the (G160) Passenger Door Lock Switch Mux circuit in the Passenger Memory Mirror Module connector.

Q: Is there any voltage present?

YES: Repair the (G160) Passenger Door Lock Switch Mux circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Replace the Passenger Memory Mirror Module. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

5. (G161) DRIVER DOOR LOCK SWITCH MUX WIRE SHORT TO VOLTAGE




Disconnect the Driver Memory Mirror Module C1 connector.
Measure the voltage of the (G161) Driver Door Lock Switch Mux circuit in the Memory Mirror Module connector.

Q: Is there any voltage present?

YES: Repair the (G161) Driver Door Lock Switch Mux circuit for a short to voltage. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 6

6. MEMORY SELECT MUX WIRE SHORT TO VOLTAGE




Disconnect the Driver Memory Mirror Module C2 connector.
Measure the voltage of the Memory Select Switch Mux circuit.

Q: Is there any voltage present?

YES: Repair the Memory Select Switch Mux wire for a short to voltage. Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Replace the Driver Memory Mirror Module. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test