Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 214
C121C–TORQUE REQUEST SIGNAL DENIED
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the ignition on.
•
Set Condition:
When the Anti-Lock Brake Module indicates if engine management relevant for Automatic Yaw Control/Traction
Control System control can be accomplished.
Possible Causes
ANTI-LOCK BRAKE MODULE
POWERTRAIN CONTROL MODULE
Diagnostic Test
1.
CHECK FOR A DTC C121C-TORQUE REQUEST SIGNAL DENIED
NOTE: This DTC must be active for the results of this test to be valid and this DTC may set while driving
under severe load conditions.
Turn the ignition on.
With the scan tool, read and record DTCs.
With the scan tool, read and record Freeze Frame information.
With the scan tool, erase DTCs.
Cycle the ignition switch from off to on.
Start Engine.
With the scan tool, read and record DTCs.
Does the scan tool display: C121C-TORQUE REQUEST SIGNAL DENIED?
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 THE POWERTRAIN DTCs
With the scan tool, read and record Powertrain DTCs.
Were any Powertrain ESP related DTCs found?
Yes
>> Replace the Powertrain Module in accordance with the Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Replace the Anti-Lock Brake Module in accordance with the Service Information.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
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BRAKES - ABS ELECTRICAL DIAGNOSTICS
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C121D-BRAKE PRESSURE SENSOR CIRCUIT
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the ignition on.
•
Set Condition:
When the Anti-Lock Brake Module indicates that the Brake Pressure Sensor Signal is out of range.
Possible Causes
ANTI-LOCK BRAKE MODULE
INTEGRATED CONTROL MODULE
Diagnostic Test
1.
CHECK FOR A DTC C121D-BRAKE PRESSURE 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, read and record DTCs.
With the scan tool, read and record Freeze Frame information.
With the scan tool, erase DTCs.
Start the engine.
Depress and release the brake pedal.
With the scan tool, read and record DTCs.
Does the scan tool display: C121D-BRAKE PRESSURE 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.
RECHECK FOR A DTC C121D-BRAKE PRESSURE SENSOR CIRCUIT
Turn the ignition on.
With the scan tool, read and record DTCs.
With the scan tool, read and record Freeze Fame information.
With the scan tool, erase DTCs.
Start the engine.
Depress and release the brake pedal.
With the scan tool, read and record DTCs.
Does the scan tool display: C121D-BRAKE PRESSURE SENSOR CIRCUIT?
Yes
>> Replace the ICU in accordance with the Service Information.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
No
>> Test complete
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BRAKES - ABS ELECTRICAL DIAGNOSTICS
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C121E-BRAKE PRESSURE SENSOR COMPARATIVE PERFORMANCE
For a complete wiring diagram Refer to Section 8W
Diagnostic Test
1.
CHECK FOR A DTC C121D-BRAKE PRESSURE 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, read and record DTCs.
With the scan tool, read and record Freeze Frame information.
With the scan tool, erase DTCs.
Start the engine.
Depress and release the brake pedal.
With the scan tool, read and record DTCs.
Does the scan tool display: C121D-BRAKE PRESSURE 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.
RECHECK FOR A DTC C121D-BRAKE PRESSURE SENSOR CIRCUIT
Turn the ignition on.
With the scan tool, read and record DTCs.
With the scan tool, read and record Freeze Fame information.
With the scan tool, erase DTCs.
Start the engine.
Depress and release the brake pedal.
With the scan tool, read and record DTCs.
Does the scan tool display: C121D-BRAKE PRESSURE SENSOR CIRCUIT?
Yes
>> Replace the ICU in accordance with the Service Information.
Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
No
>> Test complete
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BRAKES - ABS ELECTRICAL DIAGNOSTICS
LX
C1231–DRIVE TEST: STEERING ANGLE SENSOR
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
During the Drive Test.
•
Set Condition:
If the Anti-Lock Brakes Module detects implausible Steering Angle Sensor data.
Possible Causes
STEERING ANGLE SENSOR INSTALLATION
STEERING ANGLE SENSOR
ANTI-LOCK BRAKES MODULE
Diagnostic Test
1.
CHECK FOR A DTC C1231–DRIVE TEST: STEERING ANGLE SENSOR
NOTE: This DTC must be active for the results of this test to be valid.
NOTE: If any of the following DTCs are present they must be repaired before continuing.
DTC C1219-STEERING ANGLE SENSOR ERRATIC PERFORMANCE
DTC C121A-STEERING ANGLE SENSOR NOT INITIALIZED
DTC C123F-STEERING ANGLE SENSOR COMPARATIVE PERFORMANCE
DTC C1240-STEERING ANGLE SENSOR ANGLE OVERTRAVEL PERFORMANCE
Turn the ignition on.
With the scan tool, read and record DTCs.
With the scan tool, read and record Freeze Frame information.
Perform ECU initialization with drive test. Refer to Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 -
BRAKES - STANDARD PROCEDURE).
Start the engine.
With the scan tool, read and record DTCs.
Does the scan tool display: C1231–DRIVE TEST: STEERING ANGLE SENSOR?
Yes
>> Go To 2
No
>> Refer to the INTERMITTENT CONDITION diagnostic procedure.
Refer to the ABS-INTERMITTENT CONDITION TEST. (Refer to 5 - BRAKES - DIAGNOSIS AND TEST-
ING)
2.
VERIFY THAT THE STEERING ANGLE SENSOR IS ACTIVE ON THE BUS
With the scan tool, select ECU View.
Verify that the Steering Angle Sensor is active on the bus.
Is the Steering Angle Sensor active on the bus?
Yes
>> Go To 3
No
>> (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for No
Response related diagnostic procedures.
LX
BRAKES - ABS ELECTRICAL DIAGNOSTICS
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