Dodge Nitro. Manual - part 162

Fig. 21: Wheel Speed Sensor Circuit Schematic 
Courtesy of CHRYSLER LLC 

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article. 

When Monitored: 

 

2007 Dodge Nitro R/T 

2007 BRAKES ABS - Electrical Diagnostics - Nitro

  

With the ignition on. 

Set Condition: 

If the Left Rear Wheel Speed Sensor (WSS) circuit fails the diagnostic test. 

Diagnostic Test 

1) CHECK FOR DTC C1020-LEFT REAR WHEEL SPEED SENSOR CIRCUIT 

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. 

Does the scan tool display: C1020-LEFT REAR WHEEL SPEED SENSOR CIRCUIT?  

Yes  

Go to 2).  

No  

The condition that caused the symptom is currently not present. Inspect the related wiring for a 
possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.  

Refer to the ABS INTERMITTENT CONDITION.  

2) CHECK CONNECTOR/TERMINAL FOR DAMAGE 

Possible Causes 

WIRING HARNESS, TERMINAL, CONNECTOR DAMAGE
(B4) LEFT REAR WSS 12 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE, GROUND, OR 
OPEN
(B3) LEFT REAR WSS SIGNAL CIRCUIT SHORTED TO VOLTAGE, GROUND, OR OPEN
(B3) LEFT REAR WSS SIGNAL CIRCUIT SHORTED TO (B4) LEFT REAR WSS 12 VOLT 
SUPPLY CIRCUIT
LEFT REAR WSS
ANTI-LOCK BRAKES MODULE

NOTE:

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

NOTE:

Check all terminals for broken, bent, pushed out, or corroded terminals.

 

2007 Dodge Nitro R/T 

2007 BRAKES ABS - Electrical Diagnostics - Nitro

  

Turn the ignition off. 

Inspect the Anti-Lock Brake Module harness connector, Left Rear WSS, and Left Rear WSS harness 
connector. 

Is the Left Rear WSS or any of the connectors/terminals damaged?  

Yes  

Repair as necessary.  

Perform ABS VERIFICATION TEST.  

No  

Go to 3).  

3) CHECK (B4) LEFT REAR WSS 12 VOLT SUPPLY CIRCUIT VOLTAGE 

 

2007 Dodge Nitro R/T 

2007 BRAKES ABS - Electrical Diagnostics - Nitro

  

Fig. 22: Measuring Voltage Of (B4) Left Rear WSS 12 Volt Supply Circuit 
Courtesy of CHRYSLER LLC 

Disconnect the Left Rear WSS harness connector. 

Turn the ignition on. 

Measure the voltage of the (B4) Left Rear WSS 12 Volt Supply circuit. 

Is the voltage above 10.0 volts?  

Yes  

 

2007 Dodge Nitro R/T 

2007 BRAKES ABS - Electrical Diagnostics - Nitro