B1806

B1806-PASSENGER DOOR LOCK/UNLOCK SWITCH INPUT CIRCUIT LOW





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

- 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.25 volts, the input circuit is not valid and this code will set.





1. TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, erase all DTCs.
3. Operate the Driver Door Lock Switch in the lock and unlock position several times.
4. Cycle the ignition from on to off.
5. Turn the ignition on.
6. With the scan tool, read DTCs.

Does the scan tool display B1806-PASSENGER DOOR LOCK/UNLOCK SWITCH INPUT CIRCUIT LOW?

Yes

- Go To 2

No

- The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. DOOR LOCK SWITCH SHORTED




1. Disconnect the Passenger Window/Door Lock Switch connector.
2. With the scan tool in sensors, read the PASSENGER DOOR LOCK SWITCH voltage.

Is the voltage approximately 5.0 volts?

Yes

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

No

- Go To 3

3. DRIVER DOOR LOCK SWITCH MUX CIRCUIT SHORT TO GROUND




1. Turn the ignition off.
2. Disconnect the Cluster C2 connector.
3. Measure the resistance between ground and the Passenger Door Lock Switch Mux circuit.

Is the resistance below 10,000 Ohms?

Yes

- Repair the Passenger Door Lock Switch Mux circuit for a short to ground.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the Instrument Cluster in accordance with the Service Information.
- Perform the BODY VERIFICATION TEST. Body Verification Test.