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