B3138

Diagnostic Chart:

Schematic:

CIRCUIT DESCRIPTION,
The remote keyless entry keyfob sends a radio signal to the body control module (BCM) to lock the doors when the keyfob lock button is pressed. When the BCM receives the lock signal, the BCM applies battery voltage to the door lock relay control circuit. Ground for the door lock relay is supplied at all times.

CONDITIONS FOR RUNNING THE DTC
Voltage supplied to the body control module is in the normal operating range (approximately 9-16 volts).

CONDITIONS FOR SETTING THE DTC
The door lock relay control circuit is shorted to battery voltage for 30 seconds.

ACTION TAKEN WHEN DTC SETS
All door lock and unlock functions are inoperative from the keyfob as long as the malfunction is present.

CONDITIONS FOR CLEARING THE DTC
^ A current DTC B3138 will clear when the malfunction is no longer present.
^ All BCM history codes clear after 100 ignition cycles with no current codes active during the 100 ignition cycles.

DIAGNOSTIC AIDS
Pressing and holding the door lock switch for 30 seconds will also set this DTC.

TEST DESCRIPTION
The number(s) below refer to the step number(s) on the diagnostic table.
2. Listen for an audible click when the door lock relay operates. Command both the ON and OFF states. Repeat the commands as necessary.
3. Verifies that the BCM is providing voltage to the door lock relay.
4. Tests for an open in the ground circuit to the door lock relay.
5. Tests if voltage is constantly being applied to the door lock relay.