B2965

Diagnostic Chart:

Schematic:

CIRCUIT DESCRIPTION
CKT 80 is the key-in input to the body control module (BCM). The BCM monitors CKT 80 in order to determine if the ignition key is in the ignition switch.

CONDITIONS FOR RUNNING THE DTC
The ignition switch is on for at least 20 seconds.

CONDITIONS FOR SETTING THE DTC
The KEY-IN IGNITION input to the BCM is not active after the ignition switch has been on for 20 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ The BCM assumes the KEY-IN IGNITION input to be active.
^ The interior lights do not turn on when the key is removed from the ignition switch.

CONDITIONS FOR CLEARING THE DTC
^ A current DTC B2965 will clear when the code setting condition is no longer present and the ignition switch is cycled.
^ All BCM history codes clear after 100 ignition cycles (from OFF to ON) with no current codes active during the 100 ignition cycles.

DIAGNOSTIC AIDS
^ Inspect the wiring and connections to the ignition switch and BCM.
^ If the DTC is a history DTC, the problem may be intermittent. Perform the tests shown while wiggling the wiring and connectors. This may often cause the malfunction to appear.
TEST DESCRIPTION
The number(s) below refer to the step number(s) on the diagnostic table.
2. The scan tool will display YES when the ignition key is inserted into the ignition switch.
3. The ignition switch will supply a ground signal to the BCM when the key is inserted.
6. This step tests for a short to ground in circuit 80.