Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 206
•
When Monitored:
During active ABS control.
•
Set Condition:
If the Anti-Lock Brakes Module detects a pressure reduction phase and the following pressure hold phase is
too long.
Possible Causes
LEFT FRONT TONE WHEEL/BEARING DAMAGED
WHEEL SPEED SIGNALS SWAPPED
LEFT FRONT WSS
ANTI-LOCK BRAKES MODULE
Diagnostic Test
1.
COMPARE WHEEL SPEED SENSOR SIGNALS
WARNING: Ensure brake capability is available before road testing.
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.).
Does the Left Front WSS speed differ from the other WSS speeds by 8 km/h (5 m.p.h.) or show NO
speed?
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.
INSPECT TONE WHEEL/BEARING
Turn the ignition off.
Visually inspect the tone wheel and bearing for damage.
•
Check the tone wheel teeth for missing teeth, cracks, and looseness. The teeth must be perfectly square, not
bent, or nicked. Check the wheel bearing for worn/looseness.
Were any problems found?
Yes
>> Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
No
>> Go To 3
3.
CHECK WHEEL SPEED SENSOR WIRING
Check the Anti-Lock Brakes Module and Wheel Speed Sensors harness connectors for incorrectly wired connectors.
Were any problems found?
Yes
>> Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
No
>> Go To 4
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BRAKES - ABS ELECTRICAL DIAGNOSTICS
LX
4.
LEFT FRONT WHEEL SPEED SENSOR
Replace the Left Front Wheel Speed Sensor in accordance with the Service Information.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
CAUTION: Ensure brake capability is available before road testing.
Road test the vehicle over 40 km/h (25 m.p.h.).
NOTE: Vehicle must be driven above 40 km/h (25 m.p.h.) for set conditions to be meet.
With the scan tool, read ABS DTCs.
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.
Did DTC C1046–LEFT FRONT WHEEL PRESSURE PHASE MONITORING 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.
LX
BRAKES - ABS ELECTRICAL DIAGNOSTICS
5 - 267
C1047-RIGHT FRONT WHEEL PRESSURE PHASE MONITORING
For a complete wiring diagram Refer to Section 8W.
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BRAKES - ABS ELECTRICAL DIAGNOSTICS
LX
•
When Monitored:
During active ABS control.
•
Set Condition:
If the Anti-Lock Brakes Module detects a pressure reduction phase and the following pressure hold phase is
too long.
Possible Causes
RIGHT FRONT TONE WHEEL DAMAGED
WHEEL SPEED SIGNALS SWAPPED
RIGHT FRONT WSS
ANTI-LOCK BRAKES MODULE
Diagnostic Test
1.
COMPARE WHEEL SPEED SENSOR SIGNALS
WARNING: Ensure brake capability is available before road testing.
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.).
Does the Right Front WSS speed differ from the other WSS speeds by 8 km/h (5 m.p.h.) or show NO
speed?
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.
INSPECT TONE WHEEL/BEARING
Turn the ignition off.
Visually inspect the tone wheel and bearing for damage.
•
Check the tone wheel teeth for missing teeth, cracks, and looseness. The teeth must be perfectly square, not
bent, or nicked. Check the wheel bearing for worn/looseness.
Were any problems found?
Yes
>> Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
No
>> Go To 3
3.
CHECK WHEEL SPEED SENSOR WIRING
Check the Anti-Lock Brakes Module and Wheel Speed Sensors harness connectors for incorrectly wired connectors.
Were any problems found?
Yes
>> Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
No
>> Go To 4
LX
BRAKES - ABS ELECTRICAL DIAGNOSTICS
5 - 269
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