Step
| Action
| Value(s)
| Yes
| No
|
Important:
| • | Inspect the condition of the body control module (BCM), Ign 1,
the cruise and the park lamp fuses (located in the left bussed electrical
center LBEC and the 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 function properly. |
|
1
|
- Turn ON the ignition.
- Using a scan tool, read the BCM input data for the seat belt.
Does the scan tool read the specific value?
| YES
|
Go to Step
8
|
Go to Step
2
|
2
|
- Turn OFF the ignition.
- Remove the connector combs from the BCM connector C2, leaving
the BCM connected.
- Using the appropriate probe from the J 35616
connector test adapter kit, backprobe CKT 238 (BLK/WHT)
cavity B11 to ground with a fused jumper.
- Turn ON the ignition.
Does the seat belt chime sound?
| --
|
Go to Step
3
|
Go to Step
8
|
3
|
- Disconnect the seat belt switch.
- Connect a fused jumper between CKT 238 (BLK/WHT) cavity A (base
seat) or B (all other seats) to ground.
- Does the seat belt chime sound?
| --
|
Go to Step 5
|
Go to Step 4
|
4
| Locate and
repair the open in CKT 238 (BLK/WHT) between the BCM and the seat belt switch
or the inflatable restraint sensing and the diagnostic module.
Is the repair complete?
| --
| System OK
| --
|
5
| Connect a fused jumper between CKT 238 (BLK/WHT) cavity
A (base seat) or B (all other seats) to CKT 2350 (BLK) cavity B (base seat),
2 (power seat) or F (full feature seat).
Does the seat belt chime sound?
| --
|
Go to Step
6
|
Go to Step
7
|
6
| Replace the seat belt switch. Refer
to
Seat Belt Buckle Replacement - Left Front
in Seat Belts.
Is the repair complete?
| --
| System OK
| --
|
7
| Locate and repair the open in CKT 2350 (BLK) between the
seat belt switch and ground.
Is the repair complete?
| --
| System OK
| --
|
8
| Replace the BCM. Refer to
Body Control Module Replacement
in Body Control Systems.
Is the repair complete?
| --
| System OK
| --
|
