Step
| Action
| Value(s)
| Yes
| No
|
|
Important: In order to avoid misdiagnosis, check for powertrain control module
(PCM) diagnostic trouble codes (DTCs). Refer to Engine Controls.
|
1
|
- Disconnect the Body Control Module (BCM) connector C3.
- Turn the ignition switch to the RUN position.
Is the SECURITY indicator illuminated?
| --
|
Go to Step 2
|
Go to Step
3
|
2
|
- Inspect for a short to ground on circuit 728 between the
BCM connector C3 terminal C12 and the instrument cluster connector
terminal A3.
- If the connection is OK, service the instrument cluster. Refer
to
Instrument Cluster Replacement
in Instrument Panel, Gauges and Console.
Is the repair complete?
| --
| System OK
| --
|
3
|
- Perform a lock cylinder and harness test. Refer to
Ignition Lock Cylinder Test
.
- If the keys, the lock cylinder, and the cylinder harness are OK,
replace the BCM. Refer to
Body Control Module Replacement
in Body Control Systems. The security indicator
will remain illuminated for approximately 1 minute after the
repair is complete if a failure occurred in the previous ignition cycle.
Is the repair complete?
| --
| System OK
| --
|
