B1806
B1806-PASSENGER DOOR LOCK/UNLOCK SWITCH CIRCUIT LOW
For a complete wiring diagram refer to Diagrams/Electrical.
- When Monitored:
At all times when battery power is supplied to the Instrument Cluster.
- Set Condition:
When the Instrument Cluster senses voltage to the passenger door lock switch below 0.25 volts, the input circuit is not valid and this code will set.
Diagnostic Test
1. DTC PRESENT
Turn the ignition on.
With the scan tool, record and erase DTC's.
With the scan tool, read DTC's.
Operate the door locks several times from the Driver Door Lock Switch while monitoring the DRBIII(R).
Does the scan tool display B1806-PASSENGER DOOR LOCK/UNLOCK SWITCH CIRCUIT LOW?
Yes
- Go To 2
No
- 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
Disconnect the Passenger Door Lock Switch connector.
With the scan tool in sensors, read the PASS DOOR LOCK SW MUX circuit.
Is the voltage above 4.6 volts?
Yes
- Replace the Passenger Door Lock Switch.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
No
- Go To 3
3. (G160) PASSENGER DOOR LOCK SWITCH MUX CIRCUIT SHORTED
Turn the ignition off.
Disconnect the Instrument Cluster C4 connector.
Measure the resistance between the (G160) Passenger Door Lock Switch Mux circuit and ground.
Is the resistance below 1000.0 ohms?
Yes
- Repair the (G160) 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