Jeep XJ. Manual — part 550
TEST
ACTION
APPLICABILITY
12
Turn the ignition off.
Disconnect the Instrument Cluster C1 harness connector.
Measure the resistance between ground and the ground circuit.
Is the resistance below 5.0 ohms?
All
Yes
→
Replace the Instrument Cluster.
Perform BODY VERIFICATION TEST - VER 1.
No
→
Repair the Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
13
Turn the ignition off.
Disconnect the PCM C1 harness connector.
Measure the resistance between ground and each ground circuit (cavs 31 and 32).
Is the resistance below 5.0 ohms for each measurement?
All
Yes
→
Replace the Powertrain Control Module.
Perform BODY VERIFICATION TEST - VER 1.
No
→
Repair the ground circuit that measured above 5.0 ohms for an
open.
Perform BODY VERIFICATION TEST - VER 1.
80
COMMUNICATION
*SHORT TO BATTERY FAILURE —
Continued
Symptom:
*SHORT TO GROUND FAILURE
POSSIBLE CAUSES
GROUND CIRCUIT OPEN
POWERTRAIN CONTROL MODULE
AIRBAG CONTROL MODULE
INSTRUMENT CLUSTER
SENTRY KEY IMMOBILIZER MODULE (IF EQUIPPED)
REMOTE KEYLESS ENTRY MODULE (IF EQUIPPED)
OVERHEAD CONSOLE (IF EQUIPPED)
TRANSMISSION CONTROL MODULE (IF EQUIPPED)
CCD BUS (+) OR BUS (-) CIRCUIT SHORTED TO GROUND
DRB OR DRB CABLE
TEST
ACTION
APPLICABILITY
1
Turn the ignition off.
Disconnect the DRB from the DLC.
Measure the resistance between ground and the ground circuit (cavity 5) at the DLC.
Is the resistance below 5.0 ohms?
All
Yes
→
No
→
Repair the Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition off.
Disconnect the PCM C3 harness connector.
Turn the ignition on.
With the DRB, enter SYSTEM MONITORS then CCD Bus Test.
Does the DRB display: SHORT TO GROUND?
All
Yes
→
No
→
Replace the Powertrain Control Module.
Perform BODY VERIFICATION TEST - VER 1.
3
TURN THE IGNITION OFF, DISCONNECT THE BATTERY AND WAIT TWO
MINUTES BEFORE PROCEEDING.
Disconnect the ACM harness connector.
TURN THE IGNITION ON, THEN RECONNECT THE BATTERY.
With the DRB, enter SYSTEM MONITORS then CCD Bus Test.
Does the DRB display: SHORT TO GROUND?
All
Yes
→
No
→
Replace the Airbag Control Module.
Perform BODY VERIFICATION TEST - VER 1.
81
COMMUNICATION
TEST
ACTION
APPLICABILITY
4
Turn the ignition off.
Disconnect the Instrument Cluster C2 harness connector.
Turn the ignition on.
With the DRB, enter SYSTEM MONITORS then CCD Bus Test.
Does the DRB display: SHORT TO GROUND?
All
Yes
→
No
→
Replace the Instrument Cluster.
Perform BODY VERIFICATION TEST - VER 1.
5
NOTE: Answer Yes to the question if the vehicle is not equipped with this
module.
Turn the ignition off.
Disconnect the SKIM harness connector.
Turn the ignition on.
With the DRB, enter SYSTEM MONITORS then CCD Bus Test.
Does the DRB display: SHORT TO GROUND?
All
Yes
→
No
→
Replace the Sentry Key Immobilizer Module.
Perform BODY VERIFICATION TEST - VER 1.
6
NOTE: Answer Yes to the question if the vehicle is not equipped with this
module.
Turn the ignition off.
Disconnect the RKE Module harness connector.
Turn the ignition on.
With the DRB, enter SYSTEM MONITORS then CCD Bus Test.
Does the DRB display: SHORT TO GROUND?
All
Yes
→
No
→
Replace the Remote Keyless Entry Module.
Perform BODY VERIFICATION TEST - VER 1.
7
NOTE: Answer Yes to the question if the vehicle is not equipped with this
module.
Turn the ignition off.
Disconnect the Compass Mini Trip Computer (overhead console) harness connector.
Turn the ignition on.
With the DRB, enter SYSTEM MONITORS then CCD Bus Test.
Does the DRB display: SHORT TO GROUND?
All
Yes
→
No
→
Replace the Compass Mini Trip Computer (Overhead Console).
Perform BODY VERIFICATION TEST - VER 1.
8
NOTE: Answer Yes to the question if the vehicle is not equipped with this
module.
Turn the ignition off.
Disconnect the TCM harness connector.
Turn the ignition on.
With the DRB, enter SYSTEM MONITORS then CCD Bus Test.
Does the DRB display: SHORT TO GROUND?
All
Yes
→
No
→
Replace the Transmission Control Module.
Perform BODY VERIFICATION TEST - VER 1.
82
COMMUNICATION
*SHORT TO GROUND FAILURE —
Continued
TEST
ACTION
APPLICABILITY
9
Turn the ignition off.
Disconnect the negative battery cable.
Disconnect the PCM C3 harness connector.
Disconnect the ACM harness connector.
Disconnect the Instrument Cluster C2 harness connector.
Disconnect the SKIM harness connector (If equipped).
Disconnect the RKE Module harness connector (If equipped).
Disconnect the Overhead Console harness connector (If equipped).
Disconnect the TCM harness connector (If equipped).
Measure the resistance between ground and the CCD Bus (+) and the CCD Bus (-)
circuits at the DLC.
Is the resistance below 1000.0 ohms on either circuit?
All
Yes
→
Repair the CCD Bus (+) or CCD Bus (-) circuit for a short to
ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→
10
If there are no possible causes remaining, view repair.
All
Repair
Repair/replace the DRB or DRB cable as necessary.
Perform BODY VERIFICATION TEST - VER 1.
83
COMMUNICATION
*SHORT TO GROUND FAILURE —
Continued
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