Dodge Durango (HB). Manual — part 85
C1011–LEFT FRONT WHEEL SPEED SENSOR INPUT SIGNAL ERRATIC 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 Left Front WSS Signal is intermittently missing at a vehicle speed above at 40 kph (25 mph) or
erratic wheel speed signal during acceleration or sensed wheel speed is different from other wheels.
Possible Causes
LEFT FRONT WSS LOOSE - B8,B9 CIRCUITS/CONNECTOR/TERMINAL DAMAGE
LEFT FRONT TONE WHEEL DAMAGE
LEFT FRONT WSS AIR GAP FAULT
LEFT FRONT WHEEL BEARING DAMAGE
LEFT FRONT BRAKE HARDWARE DAMAGE
LEFT FRONT WSS - INTERNAL FAULT
ANTI-LOCK BRAKE MODULE - INTERNAL FAULT
Diagnostic Test
1.
CHECK FOR DTC C1011–LEFT FRONT WHEEL SPEED SENSOR INPUT SIGNAL ERRATIC
PERFORMANCE
NOTE: This DTC must be active for the results of this test to be
valid.
Turn the ignition on.
With the scan tool, record and erase DTC’s.
Cycle the ignition switch from off to on.
With the scan tool, read DTC’s
NOTE: The Anti-Lock Brake Module must sense ALL 4 wheels at
12 km/h (7.5 mph) before it will extinguish the ABS indicators.
Does the scan tool display: C1011–LEFT FRONT WHEEL
SPEED SENSOR INPUT SIGNAL ERRATIC PERFORMANCE and
C100A–LEFT FRONT WHEEL SPEED SENSOR CIRCUIT?
Yes
>> Refer to C100A–Left Front Wheel Speed Sensor Circuit for
the related symptom(s).
Perform ABS VERIFICATION TEST - VER 1.
No
>> Go To 2
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BRAKES - ABS ELECTRICAL DIAGNOSTICS
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C1011–LEFT FRONT WHEEL SPEED SENSOR INPUT SIGNAL ERRATIC PERFORMANCE (CONTINUED)
2.
CHECK WHEEL SPEED SENSOR SIGNALS
Turn the ignition on.
With the scan tool, monitor ALL the 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 3
No
>> Refer to the INTERMITTENT CONDITION diagnostic pro-
cedure.
Perform ABS VERIFICATION TEST - VER 1.
3.
CHECK LEFT FRONT WSS LOOSENESS, INSPECT B8,B9 CIRCUITS/CONNECTORS/TERMINALS FOR
DAMAGE
NOTE: Check all terminals for broken, bent, pushed out, or cor-
roded terminals.
Turn the ignition off.
Inspect the Anti-Lock Brake Module harness connector, Left Front
WSS, and Left Front WSS harness connector.
Inspect the Left Front WSS for looseness and not properly fastened.
Inspect the (B8) Left Front WSS Signal and (B9) Left Front WSS Sup-
ply circuits between the Left Front WSS and Anti-Lock Brake Module
for damage.
Is the Left Front WSS loose or any of the wiring/connectors/ter-
minals damaged?
Yes
>> Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
No
>> Go To 4
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BRAKES - ABS ELECTRICAL DIAGNOSTICS
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C1011–LEFT FRONT WHEEL SPEED SENSOR INPUT SIGNAL ERRATIC PERFORMANCE (CONTINUED)
4.
CHECK LEFT FRONT TONE WHEEL FOR DAMAGE
Turn the ignition off.
Inspect the Left Front Tone Wheel for damage, missing teeth, cracks, or looseness.
NOTE: The Tone Wheel teeth should be perfectly square, not bent, or nicked.
Is the Left Front Tone Wheel damaged?
Yes
>> Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
No
>> Go To 5
5.
CHECK LEFT FRONT WSS AIR GAP
Turn the ignition off.
Using a feeler gauge, measure the Left Front WSS air gap.
NOTE: Refer to the appropriate service information, if necessary, for procedures or specifications.
Is the Left Front WSS air gap within specifications?
Yes
>> Go To 6
No
>> Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
6.
CHECK LEFT FRONT WHEEL BEARING DAMAGE
Turn the ignition off.
Inspect the Left Front wheel bearing for excessive runout or clearance.
NOTE: Refer to the appropriate service information, if necessary, for procedures or specifications.
Is the Left Front Wheel Bearing damaged?
Yes
>> Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
No
>> Go To 7
7.
CHECK LEFT FRONT BRAKE HARDWARE DAMAGE
Turn the ignition off.
Visually inspect the Left Front brake linings for contamination or overheating. Check for dragging, bent, or seized
components/hardware.
Is any brake lining, component, or hardware damaged?
Yes
>> Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
No
>> Go To 8
HB
BRAKES - ABS ELECTRICAL DIAGNOSTICS
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C1011–LEFT FRONT WHEEL SPEED SENSOR INPUT SIGNAL ERRATIC PERFORMANCE (CONTINUED)
8.
ANTI-LOCK BRAKE MODULE – INTERNAL FAULT
Turn the ignition off.
Replace the Left Front WSS.
With the scan tool, erase DTC’s.
Road test the vehicle over 40 km/h (25 m.p.h.).
Turn the ignition on.
With the scan tool, read DTC’s
Did the DTC C1011–LEFT FRONT WHEEL SPEED SENSOR
INPUT SIGNAL ERRATIC PERFORMANCE reset?
Yes
>> Replace the Anti-Lock Brake Module in accordance with
the Service Information.
Perform ABS VERIFICATION TEST - VER 1.
No
>> Test Complete.
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BRAKES - ABS ELECTRICAL DIAGNOSTICS
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