Jeep Grand Cherokee WK. Manual — part 173
C123C-SENSOR CLUSTER MOUNTING/INSTALLATION PERFORMANCE (CONTINUED)
For the Anti-Lock Brake System circuit diagram. (Refer to 5 - BRAKES - SCHEMATICS AND DIAGRAMS)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the ignition on.
•
Set Condition:
When the Anti-Lock Brake Module indicates the Sensor Cluster values are invalid.
Possible Causes
WIRING HARNESS, TERMINAL, CONNECTOR DAMAGE
IMPROPERLY INSTALLED SENSOR CLUSTER
(G94) SENSOR CLUSTER GROUND CIRCUIT OPEN
SENSOR CLUSTER
Diagnostic Test
1.
CHECK FOR A DTC C123C-SENSOR CLUSTER MOUNTING/INSTALLATION PERFORMANCE
NOTE: The Sensor Cluster is the same as the Dynamics sensor.
NOTE: This DTC must be active for the results of this test to be valid.
Turn the ignition on.
With the scan tool, read and record DTC’s.
With the scan tool, read and record Freeze Fame information.
With the scan tool, erase DTC’s.
Cycle the ignition switch from off to on.
With the scan tool, read and record DTC’s
Does the scan tool display: C123C-SENSOR CLUSTER MOUNTING/INSTALLATION PERFORMANCE?
Yes
>> Go To 2
No
>> Refer to the INTERMITTENT CONDITION diagnostic procedure.
Perform ABS VERIFICATION TEST - VER 1.
2.
CHECK THE WIRING HARNESS, TERMINALS, AND CONNECTORS
Visually inspect the related wiring harness. Look for any bruised, chafed, pierced, or partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
Were any problems found?
Yes
>> Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
No
>> Go To 3
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BRAKES - BRAKE CONTROLLER ELECTRICAL DIAGNOSTICS
WK
C123C-SENSOR CLUSTER MOUNTING/INSTALLATION PERFORMANCE (CONTINUED)
3.
CHECK THE DYNAMICS SENSOR INSTALLATION
NOTE: Sensor Cluster installation and mounting bolt torque is crucial for proper operation.
Check the Sensor Cluster for damaged, modified or bent mounting bracket.
Check the Sensor Cluster mounting bolts for loose or over tightened mounting bolts.
Were any problems found?
Yes
>> Repair as needed.
Perform ABS VERIFICATION TEST - VER 1.
No
>> Go To 4
4.
CHECK THE RESISTANCE BETWEEN THE (G94) DYNAMICS SENSOR GROUND CIRCUIT AND GROUND
Turn the ignition off.
Disconnect the Sensor Cluster harness connector.
Measure the resistance between the (G94) Sensor Cluster Ground circuit and ground.
Is the resistance below 5.0 ohm?
Yes
>> Replace the Sensor Cluster in accordance with the Service Information.
Perform ABS VERIFICATION TEST - VER 1.
No
>> Repair the (G94) Sensor Cluster Ground circuit for an open circuit.
Perform ABS VERIFICATION TEST - VER 1.
WK
BRAKES - BRAKE CONTROLLER ELECTRICAL DIAGNOSTICS
5 - 319
C2100-BATTERY VOLTAGE LOW
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BRAKES - BRAKE CONTROLLER ELECTRICAL DIAGNOSTICS
WK
C2100-BATTERY VOLTAGE LOW (CONTINUED)
For the Anti-Lock Brake System circuit diagram. (Refer to 5 - BRAKES - SCHEMATICS AND DIAGRAMS)
For a complete wiring diagram Refer to Section 8W
•
When Monitored:
With the ignition on.
•
Set Condition:
When the Anti-Lock Brake Module indicates that voltage is below 7.5 volts.
Possible Causes
TERMINAL/CONNECTOR/WIRING HARNESS DAMAGE
STARTING AND CHARGING CONDITION
FUSED B(+) CIRCUIT(S) OPEN OR HIGH RESISTANCE
GROUND CIRCUIT(S) OPEN OR HIGH RESISTANCE
ANTI-LOCK BRAKE MODULE
Diagnostic Test
1.
CHECK FOR A C2100-BATTERY VOLTAGE LOW
NOTE: This DTC must be active for the results of this test to be valid.
Turn the ignition on.
With the scan tool, read and record DTC’s.
With the scan tool, read and record Freeze Fame information.
With the scan tool, erase DTC’s.
Cycle the ignition from off to on.
With the scan tool, read and record DTC’s.
Does the scan tool display: C2100-BATTERY VOLTAGE LOW?
Yes
>> Go To 2
No
>> Refer to the INTERMITTENT CONDITION diagnostic procedure.
Perform ABS VERIFICATION TEST - VER 1.
2.
CHECK THE TERMINALS/CONNECTORS/WIRING HARNESS FOR DAMAGE
Check all related wiring for bruised, chafed, pierced, or partially broken wires.
Check all related connectors for broken, bent, pushed out, or corroded terminals.
Were any problems found?
Yes
>> Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
No
>> Go To 3
WK
BRAKES - BRAKE CONTROLLER ELECTRICAL DIAGNOSTICS
5 - 321
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