Jeep Liberty KJ. Manual — part 1104
With the scan tool, read ABS DTCs.
Does this DTC reset?
Yes
>> Replace the Anti-Lock Brakes Module in accordance with the Service Information.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
No
>> Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
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BRAKES - ABS ELECTRICAL DIAGNOSTICS
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C2100–BATTERY VOLTAGE LOW
For a complete wiring diagram Refer to Section 8W
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BRAKES - ABS ELECTRICAL DIAGNOSTICS
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•
When Monitored:
With the ignition on.
•
Set Condition:
If the Anti-Lock Brakes Module detects system voltage is below 7.5 volts.
Possible Causes
WIRING HARNESS, TERMINAL, CONNECTOR DAMAGE
ECM OR PCM DTCs PRESENT
VEHICLE BATTERY / CHARGING SYSTEM
(A107) FUSED B(+) CIRCUIT / (A200) FUSED B(+) CIRCUIT HIGH RESISTANCE
(Z107) GROUND CIRCUIT / (Z127) GROUND CIRCUIT HIGH RESISTANCE
ANTI-LOCK BRAKES MODULE
Diagnostic Test
1.
VERIFY DTC IS ACTIVE
Turn the ignition on.
With the scan tool, read and record ABS DTCs.
With the scan tool, read and record Environmental Data (EV Data).
With the scan tool, erase ABS DTCs.
Cycle the ignition switch.
With the scan tool, read ABS DTCs.
Does this DTC reset?
Yes
>> Go To 2
No
>> Perform the ABS Intermittent Condition diagnostic procedure in this Section.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
2.
CHECK IF ECM OR PCM DTCs ARE PRESENT
With the scan tool, read ECM or PCM DTCs.
Are any DTCs present?
Yes
>> Diagnose and repair the DTC(s). Refer to 9 - ENGINE - DIAGNOSIS AND TESTING.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
No
>> Go To 3
3.
CHECK BATTERY & CHARGING SYSTEM
Perform battery and charging system tests in accordance with the Service Information.
Are the battery and charging system functioning properly?
Yes
>> Go To 4
No
>> Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
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4.
INSPECT RELATED WIRING HARNESS, TERMINALS, & CONNECTORS
Turn the ignition off.
Visually inspect the related wiring harness. Look for any pinched, chafed, pierced, and partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, and corroded terminals.
Were any problems found?
Yes
>> Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
No
>> Go To 5
5.
CHECK (A107) FUSED B(+) CIRCUIT & (A200) FUSED B(+) CIRCUIT FOR HIGH RESISTANCE
Disconnect the Anti-Lock Brakes Module harness connector.
Using a 12-volt test light connected to ground, backprobe the (A107)
Fused B(+) circuit and the (A200) Fused B(+) circuit.
NOTE: The test light should illuminate brightly. Compare the
brightness to that of a direct connection to the battery.
Does the test light illuminate brightly on each circuit?
Yes
>> Go To 6
No
>> Repair all circuits that failed to illuminate the test light
brightly for high resistance.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 -
BRAKES - STANDARD PROCEDURE).
6.
CHECK (Z107) GROUND CIRCUIT & (Z127) GROUND CIRCUIT FOR HIGH RESISTANCE
Using a 12-volt test light connected to 12 volts, backprobe the (Z107)
Ground circuit and the (Z127) Ground circuit.
NOTE: The test light should illuminate brightly. Compare the
brightness to that of a direct connection to the battery.
Does the test light illuminate brightly on each circuit?
Yes
>> Replace the Anti-Lock Brakes Module in accordance with
the Service Information.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 -
BRAKES - STANDARD PROCEDURE).
No
>> Repair all circuits that failed to illuminate the test light
brightly for high resistance.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 -
BRAKES - STANDARD PROCEDURE).
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BRAKES - ABS ELECTRICAL DIAGNOSTICS
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