Dodge Nitro. Manual - part 185

 

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Dodge Nitro. Manual - part 185

 

 

Courtesy of CHRYSLER LLC 

Turn the ignition off. 

Disconnect the Steering Control Module harness connector. 

Measure the resistance between the (Z385) Ground circuit and ground. 

Is the resistance below 5.0 ohms?  

Yes  

Replace the Steering Control Module in accordance with the Service Information.  

Perform ABS VERIFICATION TEST.  

No  

Repair the (Z385) Ground circuit for an open.  

Perform ABS VERIFICATION TEST.  

C121C-TORQUE REQUEST SIGNAL DENIED 

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article. 

When Monitored: 

With the engine running. 

Set Condition: 

When the Powertrain Control Module indicates, for an extended period of time, that engine management 
relevant for Automatic Yaw Control/Traction Control System control can not be accomplished. 

Diagnostic Test 

1) CHECK FOR A DTC C121C-TORQUE REQUEST SIGNAL DENIED 

Turn the ignition on. 

Possible Causes 

ANTI-LOCK BRAKE MODULE
POWERTRAIN CONTROL MODULE

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.

 

2007 Dodge Nitro R/T 

2007 BRAKES ABS - Electrical Diagnostics - Nitro

  

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 and monitor ESP Torque Request status. 

Does the scan tool display: C121C-TORQUE REQUEST SIGNAL DENIED?  

Yes  

Go to 2).  

No  

Refer to the ABS INTERMITTENT CONDITION.  

2) CHECK THE POWERTRAIN DTCS 

With the scan tool, read and record Powertrain DTCs. 

Were any Powertrain related DTCs found?  

Yes  

Repair the Powertrain System in accordance with the Service Information.  

No  

Go to 3).  

3) ESP TORQUE REQUEST SIGNAL 

Engine started. 

With the scan tool, read the Allow ESP Torque Request status bit. 

Was the Allow ESP Torque Request showing NOT set?  

Yes  

Replace the Powertrain Module in accordance with the Service Information.  

 

2007 Dodge Nitro R/T 

2007 BRAKES ABS - Electrical Diagnostics - Nitro

  

No  

Replace the Anti-Lock Brake Module in accordance with the Service Information.  

Perform ABS VERIFICATION TEST.  

C121D-BRAKE PRESSURE SENSOR CIRCUIT 

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article. 

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. 

Diagnostic Test 

1) CHECK 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 Frame information. 

With the scan tool, erase DTCs. 

Start the engine. 

Slowly 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  

Possible Causes 

AIR IN BRAKE SYSTEM/WORN MECHANICAL COMPONENTS
ECU INTERNAL FAILURE
HCU INTERNAL FAILURE

NOTE:

This DTC must be active for the results of this test to be valid.

 

2007 Dodge Nitro R/T 

2007 BRAKES ABS - Electrical Diagnostics - Nitro

  

Go to 2).  

No  

Refer to the ABS INTERMITTENT CONDITION.  

2) HCU/ECU ISOLATION 

Turn the ignition off. 

Separate the ECU from the HCU. 

With the scan tool, monitor brake pressure. 

Does the scan tool display brake pressure above 218 bar (3162 psi)?  

Yes  

Replace the HCU in accordance with the Service Information.  

Perform ABS VERIFICATION TEST.  

No  

Replace the ECU in accordance with the Service Information.  

Perform ABS VERIFICATION TEST.  

C121E-BRAKE PRESSURE SENSOR COMPARATIVE PERFORMANCE 

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article. 

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. 

Diagnostic Test 

1) CHECK FOR A DTC C121E-BRAKE PRESSURE SENSOR COMPARATIVE 

Possible Causes 

AIR IN BRAKE SYSTEM/WORN MECHANICAL COMPONENTS
ECU INTERNAL FAILURE
HCU INTERNAL FAILURE

 

2007 Dodge Nitro R/T 

2007 BRAKES ABS - Electrical Diagnostics - Nitro

  

 

 

 

 

 

 

 

Content   ..  183  184  185  186   ..