B2965

Diagnostic Chart:

Schematic:

CIRCUIT DESCRIPTION,
The BCM receives a ground signal from the ignition switch through the key-in ignition input circuit when the key is in the ignition. The BCM monitors the key-in ignition circuit in order to determine if the ignition key is in the ignition switch.

CONDITIONS FOR RUNNING THE DTC
^ The accessory input is active for 30 seconds.
^ Voltage supplied to the BCM is in the normal operating range (approximately 9-16 volts).

CONDITIONS FOR SETTING THE DTC
The KEY-IN IGNITION input to the BCM is not active.

ACTION TAKEN WHEN DTC SETS
^ The BCM assumes the KEY-IN IGNITION input to be active.
^ The BCM stores DTC B2965 in memory.

CONDITIONS FOR CLEARING THE DTC
^ A current DTC B2965 will clear when the code setting condition is no longer present.
^ 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 above tests 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 scan tool will display NO when the ignition key is removed from the ignition switch.
6. This step tests for a short to ground in circuit 80.