DOOR LOCK SWITCH SHORT TO GROUND

For a complete wiring diagram Refer to Section 8W.

When Monitored:
Whenever the ignition is on.
Set Condition:
When the BCM detects a voltage of less than 0.25 volts on the door lock switch mux input for over 5 seconds, this code will set. The normal voltage on the circuit is between 0.25 and 4.75 volts depending on switch positions. NOTE: Left and right switches are in parallel.

Possible Causes

(P36) LEFT DOOR LOCK SWITCH MUX WIRE SHORT TO GROUND

(P36) RIGHT DOOR LOCK SWITCH MUX WIRE SHORT TO GROUND

LEFT DOOR LOCK SWITCH - SHORTED

RIGHT DOOR LOCK SWITCH - SHORTED

JUNCTION BLOCK SHORT TO GROUND

BODY CONTROL MODULE - DOOR LOCK SWITCH MUX SHORT TO GROUND

1.CHECK TROUBLE CODE

Does the scan tool display DOOR LOCK SWITCH SHORT TO GROUND?

Yes

Problem is intermittent and not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors and repair as necessary.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

2.CHECK THE LEFT DOOR LOCK SWITCH MUX CIRCUIT FOR A SHORT TO GROUND

Is the resistance below 1000.0 ohms?

Yes

3.CHECK LEFT DOOR LOCK SWITCH MUX WIRE FOR A SHORT TO GROUND

Is the resistance below 1000.0?

Yes

Repair the (P36) Door Lock Switch Mux wire for a short to ground.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

Replace the Left Door Lock Switch.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

4.CHECK THE RIGHT DOOR LOCK SWITCH MUX CIRCUIT FOR A SHORT TO GROUND

Is the resistance below 1000.0 ohms?

No

Yes

5.CHECK RIGHT DOOR LOCK SWITCH MUX WIRE FOR A SHORT TO GROUND

Is the resistance below 1000.0 ohms?

Yes

Repair the (P36) Door Lock Switch Mux wire for a short to ground.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

Replace the Right Door Lock Switch.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

6.CHECK THE JUNCTION BLOCK FOR A SHORT TO GROUND

NOTE: Ensure the Junction Block C1, C2 and C3 connectors are connected before proceeding.

Is the resistance below 2000.0 ohms?

Yes

Replace the Junction Block in accordance with service information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

Replace the Body Control Module in accordance with service information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)