Dodge Nitro. Manual — part 160

above 40 km/h (25 mph) or erratic wheel speed signal during acceleration or sensed wheel speed is
different from other wheels.

Diagnostic Test

1) CHECK FOR DTC C101C-RIGHT FRONT WHEEL SPEED SENSOR SIGNAL ERRATIC
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: C101C-RIGHT FRONT WHEEL SPEED SENSOR SIGNAL
ERRATIC PERFORMANCE active?

Yes

Go to 3).

No

Possible Causes

RIGHT FRONT WSS LOOSE - B6, B7 CIRCUITS/CONNECTOR/TERMINAL DAMAGE
RIGHT FRONT TONE WHEEL DAMAGE
RIGHT FRONT WHEEL/BEARING DAMAGE
IMPROPER RIGHT FRONT TIRE PRESSURE/MISMATCHED TIRES
RIGHT FRONT WSS
ANTI-LOCK BRAKE MODULE

NOTE:

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

NOTE:

If DTC C1015-Right Front Wheel Speed Sensor Circuit is present it must be
repaired before continuing.

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

Yes

Go to 3).

No

Refer to the ABS INTERMITTENT CONDITION.

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

Turn the ignition off.

Check and adjust the Right Front Tire pressure.

Check and adjust all other tire pressures.

Inspect for mismatched tires on vehicle.

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

Yes

Repair as necessary.

Perform ABS VERIFICATION TEST.

No

Go to 4).

4) CHECK RIGHT FRONT WSS LOOSENESS, INSPECT B6, B7 CIRCUITS/TERMINALS FOR
DAMAGE

NOTE:

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

2007 Dodge Nitro R/T

2007 BRAKES ABS - Electrical Diagnostics - Nitro

Inspect the Anti-Lock Brake Module harness connector, Right Front WSS, and Right Front WSS harness
connector

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

Inspect the (B6) Right Front WSS Signal and (B7) Right Front WSS Supply circuits between the Right
Front WSS and Anti-Lock Brake Module for damage.

Is the Right 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 RIGHT FRONT WHEEL SPEED SENSOR FOR DAMAGE

Remove the Right Front Wheel Speed Sensor

Inspect the Right Front Wheel Speed Sensor face for damage.

Is the Right Front Wheel Speed Sensor damaged?

Yes

Replace sensor and hub assembly.

Perform ABS VERIFICATION TEST.

No

Go to 6).

6) CHECK RIGHT FRONT TONE WHEEL/BEARING FOR DAMAGE

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

Is the Right Front Tone Wheel/Bearing damaged?

Yes

NOTE:

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

NOTE:

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

2007 Dodge Nitro R/T

2007 BRAKES ABS - Electrical Diagnostics - Nitro

Repair as necessary.

Perform ABS VERIFICATION TEST.

No

Go to 7).

7) CHECK RIGHT FRONT WHEEL BEARING FOR DAMAGE

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

Is the Right Front Wheel Bearing Damaged?

Yes

Repair as necessary.

Perform ABS VERIFICATION TEST.

No

Go to 8).

8) RIGHT FRONT WHEEL SPEED SENSOR

Replace the Right 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 C101C-RIGHT 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.

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