Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 192
•
When Monitored:
With the ignition on.
•
Set Condition:
When the Left Front Wheel Speed Sensor circuit fails the diagnostic test.
Possible Causes
WIRING HARNESS, TERMINAL, CONNECTOR DAMAGE
(B9) LEFT FRONT WSS 12 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE, GROUND, OR OPEN
(B8) LEFT FRONT WSS SIGNAL CIRCUIT SHORTED TO VOLTAGE, GROUND, OR OPEN
(B8) LEFT FRONT WSS SIGNAL CIRCUIT SHORTED TO (B9) LEFT FRONT WSS 12 VOLT SUPPLY CIRCUIT
LEFT FRONT WSS
ANTI-LOCK BRAKES MODULE
Diagnostic Test
1.
CHECK FOR DTC C100A–LEFT FRONT WHEEL SPEED SENSOR CIRCUIT
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 DTCs.
Cycle the ignition switch from off to on.
With the scan tool, read 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.
Does the scan tool display: C100A–LEFT FRONT WHEEL SPEED SENSOR CIRCUIT?
Yes
>> Go To 2
No
>> Refer to the INTERMITTENT CONDITION diagnostic procedure.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
2.
CHECK CONNECTOR/TERMINAL FOR DAMAGE
NOTE: Check all terminals for broken, bent, pushed out, or corroded terminals.
Turn the ignition off.
Inspect the Anti-Lock Brake Module harness connector, Left Front WSS, and Left Front WSS harness connector.
Is the Left Front WSS or any of the connectors/terminals damaged?
Yes
>> Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
No
>> Go To 3
5 - 210
BRAKES - ABS ELECTRICAL DIAGNOSTICS
LX
3.
CHECK (B9) LEFT FRONT WSS 12 VOLT SUPPLY CIRCUIT VOLTAGE
Disconnect the Left Front WSS harness connector.
Turn the ignition on.
Measure the voltage of the (B9) Left Front WSS 12 Volt Supply circuit.
Is the voltage above 10.0 volts?
Yes
>> Go To 6
No
>> Go To 4
4.
CHECK (B9) LEFT FRONT WSS SUPPLY CIRCUIT SHORT TO GROUND
Turn the ignition off.
Disconnect the Left Front WSS harness connector.
Disconnect the Anti-Lock Brake Module harness connector.
Using a 12-volt test light connected to 12-volts, probe the (B9) Left
Front WSS Supply circuit.
Does the test light illuminate brightly?
Yes
>> Repair the (B9) Left Front WSS Supply circuit for a short to
ground.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 -
BRAKES - STANDARD PROCEDURE).
No
>> Go To 5
LX
BRAKES - ABS ELECTRICAL DIAGNOSTICS
5 - 211
5.
CHECK (B9) LEFT FRONT WSS SUPPLY CIRCUIT OPEN
Connect a jumper wire between ground and the (B9) Left Front WSS
Supply circuit in the Anti-Lock Brakes Module harness connector.
Using a 12-volt test light connected to 12-volts, probe the (B9) Left
Front WSS Supply circuit.
Does the test light illuminate brightly?
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 the (B9) Left Front WSS Supply circuit for an open.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 -
BRAKES - STANDARD PROCEDURE).
6.
CHECK (B8) LEFT FRONT WSS SIGNAL CIRCUIT SHORT TO GROUND
Using a 12-volt test light connected to 12-volts, probe the (B8) Left
Front WSS Signal circuit.
Does the test light illuminate brightly?
Yes
>> Repair the (B8) Left Front WSS Signal circuit for a short to
ground.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 -
BRAKES - STANDARD PROCEDURE).
No
>> Go To 7
5 - 212
BRAKES - ABS ELECTRICAL DIAGNOSTICS
LX
7.
CHECK (B8) LEFT FRONT WSS SIGNAL CIRCUIT OPEN
Connect a jumper wire between ground and the (B8) Left Front WSS
Signal circuit in the Anti-Lock Brakes Module harness connector.
Using a 12-volt test light connected to 12-volts, probe the (B8) Left
Front WSS Signal circuit.
Does the test light illuminate brightly?
Yes
>> Go To 8
No
>> Repair the (B8) Left Front WSS Signal circuit for an open.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 -
BRAKES - STANDARD PROCEDURE).
8.
CHECK (B8) LEFT FRONT WSS SIGNAL CIRCUIT SHORT TO VOLTAGE
Turn the ignition on.
Remove all jumper wires.
Measure the voltage between the (B8) Left Front WSS Signal circuit
and ground.
Is the voltage above one volt?
Yes
>> Repair the (B8) Left Front WSS Signal circuit for a short to
voltage.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 -
BRAKES - STANDARD PROCEDURE).
No
>> Go To 9
LX
BRAKES - ABS ELECTRICAL DIAGNOSTICS
5 - 213
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