Dodge Nitro. Manual — part 178

No

Test Complete.

C1049-RIGHT REAR WHEEL PRESSURE PHASE MONITORING

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article.

When Monitored:

During active ABS control.

Set Condition:

When the Anti-Lock Brakes Module detects a pressure reduction phase and the following pressure hold
phase is too long.

Diagnostic Test

1) COMPARE WHEEL SPEED SENSOR SIGNALS

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

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

Does the Right Rear WSS speed differ from the other WSS speeds by 8 km/h (5 mph) or show NO
speed?

Yes

Go to 3).

No

Go to 2).

2) CHECKING INSIDE WHEEL SPEED

Possible Causes

RIGHT REAR TONE WHEEL DAMAGED
WHEEL SPEED SIGNALS SWAPPED
RIGHT REAR WSS
ANTI-LOCK BRAKES MODULE

WARNING:

Ensure brake capability is available before road testing.

2007 Dodge Nitro R/T

2007 BRAKES ABS - Electrical Diagnostics - Nitro

Slowly accelerate as straight as possible from a stop to 40 km/h (25 mph) and perform a 90 degree turn
while monitoring if inside wheel is slower than outside.

Was the inside wheel slower than outside?

Yes

Perform the ABS INTERMITTENT CONDITION diagnostic procedure.

No

Go to 3).

3) INSPECT TONE WHEEL/BEARING

Turn the ignition off.

Visually inspect the tone wheel and bearing for damage.

Check the tone wheel teeth for missing teeth, cracks, and looseness. The teeth must be perfectly
square, not bent, or nicked. Check the wheel bearing for worn/looseness.

Were any problems found?

Yes

Repair as necessary.

Perform ABS VERIFICATION TEST.

No

Go to 4).

4) CHECK WHEEL SPEED SENSOR WIRING

Check the Anti-Lock Brakes Module and Wheel Speed Sensors harness connectors for incorrectly wired
connectors.

Were any problems found?

Yes

Repair as necessary.

Perform ABS VERIFICATION TEST.

No

Go to 5).

2007 Dodge Nitro R/T

2007 BRAKES ABS - Electrical Diagnostics - Nitro

5) RIGHT REAR WHEEL SPEED SENSOR

Replace the Right Rear 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 C1049-RIGHT REAR WHEEL PRESSURE PHASE MONITORING reset?

Yes

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

Perform ABS VERIFICATION TEST.

No

Test Complete.

C1073-ABS PUMP MOTOR CONTROL CIRCUIT

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.

NOTE:

The Anti-Lock Brake Module must sense ALL 4 wheels at 12 km/h (7.5
mph) before it will extinguish the ABS indicators.

2007 Dodge Nitro R/T

2007 BRAKES ABS - Electrical Diagnostics - Nitro

Fig. 37: ABS Pump Motor Control 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