B1806

B1806-PASSENGER DOOR LOCK/UNLOCK SWITCH INPUT CIRCUIT LOW - CLUSTER

B1806 - Passenger Door Lock/Unlock Switch Input Circuit Low - Cluster:

WHEN MONITORED
Continuously

SET CONDITION
When the Driver Door Lock Switch Mux circuit is below 0.7 volts for over 5 seconds.

POSSIBLE CAUSES
- Door lock switch short to ground
- (G160) Passenger door lock switch muxcircuit short to ground
- Instrument cluster

Theory of Operation
This code will only set in vehicles that do not have the Memory System.

Diagnostic Test

1.TEST FOR INTERMITTENT CONDITION




With the scan tool, record and erase DTC's
Operate the Passenger Door Lock Switch in all positions several times.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read DTC's.

Q: Does the scan tool display PASSENGER DOOR LOCK/UNLOCK SWITCH INPUT CIRCUIT LOW?

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




With the scan tool, erase DTC's.
Disconnect the Passenger Window/Door Lock Switch connector.
With the scan tool, read DTC's.

Q: Does the scan tool display PASSENGER DOOR LOCK/UNLOCK SWITCH INPUT CIRCUIT LOW?

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

3. DRIVER DOOR LOCK SWITCH MUX CIRCUIT SHORT TO GROUND




Disconnect the Cluster C2 connector.
Measure the resistance between ground and the Passenger Door Lock Switch Mux circuit.

Q: Is the resistance below 10000.0 ohms?

YES: Repair the Passenger Door Lock Switch Mux circuit for a short to ground. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Replace the Instrument Cluster. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test