Cab Power Feed Circuit - Jeep Wrangler TJ 2003 Service Manual

BRAKES (CAB)
Symptom:

CAB POWER FEED CIRCUIT

When Monitored and Set Condition:
CAB POWER FEED CIRCUIT
When Monitored: Ignition on. The CAB monitors the Fused B(+) circuit at all times for
proper system voltage.
Set Condition: If the Fused B(+) voltage is missing when the CAB detects that an internal
main driver is not on , the Diagnostic Trouble Code (DTC) is set.
INTERMITTENT DTC
B(+) CIRCUIT SHORTED TO GROUND
BLOWN FUSE - FUSED B(+) CIRCUIT
CAB - FUSED B(+) CIRCUIT SHORTED TO GROUND
FUSED B(+) CIRCUIT OPEN
NO B+ SUPPLY TO FUSE
CAB - FUSED B(+) CIRCUIT OPEN
TEST
1 Turn the ignition on.
With the DRBIII , erase DTC's.
Turn the ignition off.
Turn the ignition on.
Drive the vehicle above 25 km/h (15 mph) for at least 10 seconds.
Stop the vehicle.
With the DRBIII , read DTC's.
Does the DRBIII display CAB Power Feed Circuit DTC present right now?
Yes → Go To 2
→ Go To 9
No
2 Turn the ignition off.
Remove and Inspect Fuse 12 in the PDC.
Is the Fuse blown?
Yes → Go To 3
→ Go To 6
No
POSSIBLE CAUSES
ACTION
10
APPLICABILITY
All
All