Jeep Grand Cherokee WK. Manual — part 172
C123B-ESP SYSTEM CONTROL TOO LONG (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 Dynamics Sensor failure.
Possible Causes
WIRING HARNESS, TERMINAL, CONNECTOR DAMAGE
DYNAMICS SENSOR
Diagnostic Test
1.
CHECK FOR A DTC C123B-ESP SYSTEM CONTROL TOO LONG
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: C123B-ESP SYSTEM CONTROL TOO LONG?
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
>> Replace the Dynamics Sensor in accordance with the Service Information.
Perform ABS VERIFICATION TEST - VER 1.
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BRAKES - BRAKE CONTROLLER ELECTRICAL DIAGNOSTICS
WK
C1242-GSENSOR INPUT SIGNAL PERFORMANCE
•
When Monitored:
Continuously after power-on reset until vehicle speed exceeds 12.4mph/20 kph for the first time, but not not if
the sensor voltage is out of range,
Or, during diagnostic mode.
Or, if the monitoring was inhaibited by a corresponding diagnostics command.
Or, if the wehicle speed has exceeded 12.4 mph/20 kph during the actual ignition cycle.
Or, if at least one overspinning wheel is detected.
Or, if one of the control functions is active.
•
Set Condition:
A failure is detected if the measured acceleratin signal is higher than 0.8 g longer than the specified detection
time.
Possible Causes
DEFECTIVE SENSOR
Diagnostic Test
1.
Module failure
NOTE: The Sensor Cluster is the same as the Dynamics sensor.
The G-sensor is in the ABM if it is TCS only, or in the Sensor Cluster if it has ESP.
Repair.
Repair
Replace the ABM if it is TCS only, or replace the Sensor Cluster if it has ESP.
WK
BRAKES - BRAKE CONTROLLER ELECTRICAL DIAGNOSTICS
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C1243-G SENSOR NOT INTIALIZED
•
When Monitored:
Continuously after power-on reset until vehicle speed exceeds 12.4mph/20 kph for the first time, but not not if
the sensor voltage is out of range,
Or, during diagnostic mode.
Or, if the monitoring was inhaibited by a corresponding diagnostics command.
Or, if the wehicle speed has exceeded 12.4 mph/20 kph during the actual ignition cycle.
Or, if at least one overspinning wheel is detected.
Or, if one of the control functions is active.
•
Set Condition:
A failure is detected if the measured acceleratin signal is higher than 0.8 g longer than the specified detection
time.
Possible Causes
DEFECTIVE SENSOR
Diagnostic Test
1.
Module failure
NOTE: The Sensor Cluster is the same as the Dynamics sensor.
The G-sensor is in the ABM if it is TCS only, or in the Sensor Cluster if it has ESP.
Repair
Replace the ABM if it is TCS only, or replace the Sensor Cluster if it has ESP.
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BRAKES - BRAKE CONTROLLER ELECTRICAL DIAGNOSTICS
WK
C123C-SENSOR CLUSTER MOUNTING/INSTALLATION PERFORMANCE
WK
BRAKES - BRAKE CONTROLLER ELECTRICAL DIAGNOSTICS
5 - 317
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