Dodge Nitro. Manual — part 154

Fig. 12: Measuring Resistance Between (B8) Left Front WSS Signal Circuit And (B9) Left Front
WSS Supply Circuit
Courtesy of CHRYSLER LLC

Turn the ignition off.

Measure the resistance between the (B8) Left Front WSS Signal circuit and the (B9) Left Front WSS
Supply circuit.

Is the resistance above 120 ohms?

Yes

Go to step 10).

No

Repair the (B8) Left Front WSS Signal circuit and the (B9) Left Front WSS Supply circuit for a

2007 Dodge Nitro R/T

2007 BRAKES ABS - Electrical Diagnostics - Nitro

short together.

Perform ABS VERIFICATION TEST.

10) 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 C100A-LEFT FRONT WHEEL SPEED SENSOR CIRCUIT reset?

Yes

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

Perform ABS VERIFICATION TEST.

No

Test Complete.

C1011-LEFT FRONT WHEEL SPEED SENSOR SIGNAL ERRATIC PERFORMANCE

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

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.

Possible Causes

2007 Dodge Nitro R/T

2007 BRAKES ABS - Electrical Diagnostics - Nitro

Diagnostic Test

1) CHECK FOR DTC C1011-LEFT 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: C1011-LEFT FRONT WHEEL SPEED SENSOR SIGNAL ERRATIC
PERFORMANCE active?

Yes

Go to 3).

No

Go to 2).

2) CHECK WHEEL SPEED SENSOR SIGNALS

Turn the ignition on.

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

NOTE:

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

NOTE:

If DTC C100A Left 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

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

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.

No

Go to 4).

4) CHECK LEFT FRONT WSS LOOSENESS, INSPECT B8, B9 CIRCUITS/TERMINALS FOR
DAMAGE

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

NOTE:

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

NOTE:

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

2007 Dodge Nitro R/T

2007 BRAKES ABS - Electrical Diagnostics - Nitro