Step
| Action
| Value(s)
| Yes
| No
|
Important:
| • | Inspect the condition of the body control module (BCM), Ign 1,
cruise fuse and park lamp fuses (located in the Left Bussed Electrical Center
LBEC and Mid Bussed Electrical Center MBEC). If any fuse is open, replace
the fuse and retest system for intermittent fuse failure. If the fuse
continues to fail locate and repair the source of overload. Refer to
Power Distribution Schematics. |
| • | Inspect in order to make sure that Ground G203 and G304 are clean
and tight. |
| • | This diagnostic table assumes that all other chimes, turn signals
and turn signal indicators operate properly. |
|
1
|
- Turn ON the ignition.
- Using a scan tool, read the BCM input data while operating the
left and the right turn signals.
Does the scan tool read ON or OFF?
| ON/OFF
|
Go to Step
2
|
Go to Step
4
|
2
|
- Raise and properly support the vehicle. Refer to
Lifting and Jacking the Vehicle
in General Information.
- Start the engine.
- Place the transmission in drive.
- Read the vehicle speed of greater than16 Km/h (10 mph)
for a minimum of 1.6 Km (1.0 miles).
Does scan tool read specific value?
| Greater than 16 Km/h (10 mph)
|
Go to Step 3
|
Go to Step 5
|
3
| Replace
the BCM. Refer to
Body Control Module Replacement
in Body Control Systems.
Is the repair complete?
| --
| System OK
| --
|
4
| Locate and repair the open in CKT 14 (LT BLU left) or CKT
15 (DK BLU right) between the BCM and the mid bussed electrical center (MBEC).
Is the repair complete?
| --
| System OK
| --
|
5
| Shift the scan tool display to read the powertrain control
module (PCM)/vehicle control module (VCM) DTCs.
Does the scan tool read DTC P0500 or DTC P0608?
| --
| Go to appropriate DTC
|
Go to Step 6
|
6
| Locate and
repair the open or short to ground in CKT 817 (DK GRN/WHT) between the PCM/VCM
and the BCM.
Is the repair complete?
| --
| System OK
| --
|
