Jeep Liberty KJ. Manual — part 826
8.
VERIFY DTC IS ACTIVE
Replace the Left Front WSS in accordance with the Service Information.
Turn the ignition on.
With the scan tool, erase ABS DTCs.
WARNING: Ensure brake capability is available before road testing.
Road test the vehicle over 40 km/h (25 m.p.h.).
With the scan tool, read ABS DTCs.
Does DTC C1011–LEFT FRONT WHEEL SPEED SENSOR INPUT SIGNAL ERRATIC PERFORMANCE
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
>> Test Complete.
5 - 64
BRAKES - ABS ELECTRICAL DIAGNOSTICS
KJ
C1014–LEFT FRONT WHEEL SPEED COMPARATIVE PERFORMANCE
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the ignition on.
•
Set Condition:
The Anti-Lock Brakes Module compares WSS readings from side-to-side and front to rear. This DTC will set if
the module senses that the Left Front WSS reading is different from other WSS readings.
Possible Causes
IMPROPER LEFT FRONT TIRE PRESSURE/MISMATCHED TIRES
LEFT FRONT WSS LOOSE
LEFT FRONT WSS CIRCUITS, CONNECTORS, TERMINALS DAMAGED
LEFT FRONT TONE WHEEL DAMAGED OR WRONG NUMBER OF TEETH
EXCESSIVE AIR GAP BETWEEN LEFT FRONT WSS AND TONE WHEEL
LEFT FRONT WHEEL BEARING DAMAGED
LEFT FRONT BRAKE HARDWARE DAMAGED
LEFT FRONT WSS
ANTI-LOCK BRAKES MODULE
Diagnostic Test
1.
VERIFY IF DTC C100A–LEFT FRONT WHEEL SPEED SENSOR CIRCUIT IS ACTIVE
Turn the ignition on.
With the scan tool, record and erase ABS DTCs.
Cycle the ignition switch.
With the scan tool, read ABS DTCs.
NOTE: The Anti-Lock Brake Module must sense all 4 wheels at 25 km/h (15 m.p.h.) before it will extinguish
the ABS Indicator.
Does the scan tool display: C100A–LEFT FRONT WHEEL SPEED SENSOR CIRCUIT?
Yes
>> Diagnose and repair the DTC. Refer to the Table of Contents in this Section for a complete list of symp-
toms.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
No
>> Go To 2
2.
CHECK LEFT FRONT TIRE PRESSURE & INSPECT ALL TIRES
Turn the ignition off.
Check and adjust all tire pressures.
Inspect for mismatched tires on vehicle.
Is the left front tire improperly inflated or are mismatched tires on vehicle?
Yes
>> Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
No
>> Go To 3
KJ
BRAKES - ABS ELECTRICAL DIAGNOSTICS
5 - 65
3.
COMPARE WHEEL SPEED SENSOR SIGNALS
WARNING: Ensure brake capability is available before road testing.
With the scan tool, monitor ALL WSS speeds while an assistant drives the vehicle.
Slowly accelerate as straight as possible from a stop to 40 km/h (25 m.p.h.).
Is the Left Front WSS speed showing 0 km/h (0 m.p.h.) or not matching other wheel speeds?
Yes
>> Go To 4
No
>> Perform the ABS Intermittent Condition diagnostic procedure in this Section.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
4.
INSPECT LEFT FRONT WSS, WIRE HARNESS, CONNECTORS & TERMINALS
Turn the ignition off.
Inspect the Anti-Lock Brakes Module harness connector, Left Front WSS connector, and Left Front WSS harness
connector for broken, bent, pushed out, and corroded terminals.
Verify that the Left Front WSS is properly installed and fastened.
Inspect the Left Front WSS wire harness between the sensor and the Anti-Lock Brakes Module for damage.
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.
INSPECT LEFT FRONT TONE WHEEL
Inspect the tone wheel for damage, missing teeth, cracks, and looseness. The teeth must be perfectly square, not
bent, or nicked.
Is the tone wheel damaged?
Yes
>> Replace the Left Front Tone Wheel in accordance with the Service Information.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
No
>> Go To 6
6.
CHECK LEFT FRONT WSS AIR GAP
Using a feeler gauge, measure the Left Front WSS air gap.
NOTE: Refer to the appropriate service information for procedures and specifications.
Is the Left Front WSS air gap within specifications?
Yes
>> Go To 7
No
>> Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
7.
CHECK LEFT FRONT WHEEL BEARING FOR DAMAGE
Check the left front wheel bearing for excessive runout and clearance.
NOTE: Refer to the appropriate service information for procedures and specifications.
Is the left front wheel bearing damaged?
Yes
>> Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
No
>> Go To 8
5 - 66
BRAKES - ABS ELECTRICAL DIAGNOSTICS
KJ
8.
CHECK LEFT FRONT BRAKE HARDWARE FOR DAMAGE
Visually inspect the left front brake linings for contamination and overheating. Check for dragging, bent, and seized
components and hardware.
Is any brake lining, component, or hardware damaged?
Yes
>> Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
No
>> Go To 9
9.
VERIFY DTC IS ACTIVE
Replace the Left Front WSS in accordance with the Service Information.
Turn the ignition on.
With the scan tool, erase ABS DTCs.
WARNING: Ensure brake capability is available before road testing.
Road test the vehicle over 40 km/h (25 m.p.h.).
With the scan tool, read ABS DTCs.
Does DTC C1014–LEFT FRONT WHEEL SPEED COMPARATIVE PERFORMANCE 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
>> Test Complete.
KJ
BRAKES - ABS ELECTRICAL DIAGNOSTICS
5 - 67
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст