Dodge Nitro. Manual - part 155

Inspect the Left Front WSS for looseness, excessive corrosion and not properly fastened.

Inspect the (B8) Left Front WSS Signal and (B9) Left Front WSS Supply circuits between the Left Front 
WSS and Anti-Lock Brake Module for damage. 

Is the Left Front WSS loose or any of the wiring/connectors/terminals damaged?  

Yes  

Repair as necessary.  

Perform ABS VERIFICATION TEST.  

No  

Go to 5).  

5) CHECK LEFT FRONT WHEEL SPEED SENSOR FOR DAMAGE 

Remove the Left Front Wheel Speed Sensor 

Inspect the Left Front Wheel Speed Sensor face for damage. 

Is the Left Front Wheel Speed Sensor damaged?  

Yes  

Replace sensor and hub assembly.  

Perform ABS VERIFICATION TEST.  

No  

Go to 6).  

6) CHECK LEFT FRONT TONE WHEEL/BEARING FOR DAMAGE 

Inspect the Left Front Tone Wheel/Bearing for damage, missing teeth, cracks, corrosion or looseness. 

Is the Left Front Tone Wheel/Bearing damaged?  

Yes  

Repair as necessary.  

Perform ABS VERIFICATION TEST.  

No  

NOTE:

The Tone Wheel teeth should be perfectly square, not bent, or nicked.

 

2007 Dodge Nitro R/T 

2007 BRAKES ABS - Electrical Diagnostics - Nitro

  

Go to 7).  

7) CHECK LEFT FRONT WHEEL BEARING FOR DAMAGE 

Inspect the Left Front wheel bearing for excessive runout or clearance. 

Is the Left Front Wheel Bearing Damaged?  

Yes  

Repair as necessary.  

Perform ABS VERIFICATION TEST.  

No  

Go to 8).  

8) LEFT FRONT WHEEL SPEED SENSOR 

Replace the Left Front Wheel Speed Sensor in accordance with the Service Information. 

Perform ABS VERIFICATION TEST.  

Road test the vehicle over 40 km/h (25 mph). 

With the scan tool, read ABS DTCs. 

Did DTC C1011-LEFT FRONT WHEEL SPEED SENSOR SIGNAL ERRATIC PERFORMANCE 
reset?  

Yes  

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

Perform ABS VERIFICATION TEST.  

No  

Test Complete.  

C1014-LEFT FRONT WHEEL SPEED COMPARATIVE PERFORMANCE 

NOTE:

Refer to the appropriate service information, if necessary, for procedures 
or specifications.

NOTE:

Vehicle must be driven above 40 km/h (25 mph) for set conditions to be 
met.

 

2007 Dodge Nitro R/T 

2007 BRAKES ABS - Electrical Diagnostics - Nitro

  

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article.

When Monitored: 

With the ignition on. 

Set Condition: 

When the Left Front Wheel Speed Sensor (WSS) Signal reading is different from the readings received 
from the other WSS's at a vehicle speed above 40 km/h (25 mph). The Anti-Lock Brake Module 
compares WSS readings from side-to-side on an axle and front-to-rear. 

Diagnostic Test 

1) CHECK FOR DTC C1014-LEFT FRONT WHEEL SPEED COMPARATIVE 
PERFORMANCE 

Turn the ignition on. 

With the scan tool, record and erase DTCs. 

Road test the vehicle over 40 km/h (25 mph). 

With the scan tool, read DTCs. 

Does the scan tool display: C1014-LEFT FRONT WHEEL SPEED COMPARATIVE 
PERFORMANCE active?  

Yes  

Possible Causes 

LEFT FRONT WSS LOOSE - B8, B9 CIRCUITS/CONNECTOR/TERMINAL DAMAGE
IMPROPER LEFT FRONT TIRE PRESSURE/MISMATCHED TIRES
LEFT FRONT TONE WHEEL/BEARING DAMAGE
LEFT FRONT WSS
ANTI-LOCK BRAKE MODULE

NOTE:

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

CAUTION: Ensure brake capability is available before road testing.

NOTE:

Vehicle must be driven above 40 km/h (25 mph) for set conditions to be 
met.

 

2007 Dodge Nitro R/T 

2007 BRAKES ABS - Electrical Diagnostics - Nitro

  

Go to 3).  

No  

Go to 2).  

2) CHECK WHEEL SPEED SENSOR SIGNALS 

Turn the ignition on. 

With the scan tool, monitor and graph ALL the WSS speeds and compare graph while an assistant drives 
the vehicle. 

Slowly accelerate as straight as possible from a stop to 40 km/h (25 mph). 

Is the Left Front WSS speed showing 0 km/h (0 mph) or not matching other wheels or showing 
erratic behavior?  

Yes  

Go to 3).  

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.  

3) CHECK FOR IMPROPER LEFT FRONT TIRE PRESSURE/MISMATCHED TIRES 

Turn the ignition off. 

Check and adjust the Left Front Tire pressure. 

Check and adjust all other tire pressures. 

Inspect for mismatched tires on vehicle. 

Is the Left Front Tire improperly inflated or mismatched tires on vehicle?  

Yes  

Repair as necessary  

Perform ABS VERIFICATION TEST. 

NOTE:

If graph shows periodic dropouts pay close attention to the tone wheel.

 

2007 Dodge Nitro R/T 

2007 BRAKES ABS - Electrical Diagnostics - Nitro