Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Perform any Service Bulletins that may apply.
2. Turn the ignition off.
3. With the scan tool, read ABS DTCs and record on the repair order.
4. With the scan tool, read and record the Environmental Data to help identify the conditions in which the DTC was set.
5. With the scan tool, erase ABS DTCs.
  WARNING:
  To avoid possible serious or fatal injury, check brake capability is available before road testing.
6. Road test the vehicle over 40 km/h (25 mph).
  NOTE:
  Vehicle must be driven above 40 km/h (25 mph) for the set conditions to be meet.
7. With the scan tool, read ABS DTCs.
  Did the DTC return?
  
  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.
  - Perform the ABS INTERMITTENT CONDITION TEST. Refer to: ABS INTERMITTENT CONDITION .
CHECK THE CONNECTORS AND TERMINALS FOR DAMAGE
NOTE:
Check all terminals for broken, bent, pushed out, or corroded terminals.
1. Turn the ignition off to the lock position.
2. Inspect the Wheel Speed Sensor for proper mounting.
3. Inspect the Wheel Speed Sensor harness and connector.
4. Inspect the Wheel Speed Sensor for excessive debris on the sensor.
  Were any problems found?
  
  Yes
  - Repair as necessary in accordance with the Service Information.
  - Perform the ABS VERIFICATION TEST. Refer to: ABS VERIFICATION TEST .
  No
  - Go To 3
CHECK THE (B4) LEFT REAR WHEEL SPEED SENSOR SUPPLY CIRCUIT VOLTAGE
1. Disconnect the Left Rear Wheel Speed Sensor harness connector.
2. Turn the ignition on.
3. Measure the voltage between the (B4) Left Rear Wheel Speed Sensor Supply circuit and ground.
  Is the voltage above 10 volts?
  
  Yes
  - Go To 6
  No
  - Go To 4
CHECK THE (B4) LEFT REAR WHEEL SPEED SENSOR SUPPLY CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the ABS Module harness connector.
3. Check for continuity between ground and the (B4) Left Rear Wheel Speed Sensor Supply circuit.
  Is there continuity between ground and the (B4) Left Rear Wheel Speed Sensor Supply circuit?
  
  Yes
  - Repair the (B4) Left Rear Wheel Speed Sensor Supply circuit for a short to ground.
  - Perform the ABS VERIFICATION TEST. Refer to: ABS VERIFICATION TEST .
  No
  - Go To 5
CHECK THE (B4) LEFT REAR WHEEL SPEED SENSOR SUPPLY CIRCUIT FOR AN OPEN OR HIGH RESISTANCE
1. Measure the resistance of the (B4) Left Rear Wheel Speed Sensor Supply circuit between the Left Rear Wheel Speed Sensor harness connector and the ABS harness connector.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 6
  No
  - Repair the (B4) Left Rear Wheel Speed Sensor Supply circuit for an open or high resistance.
  - Perform the ABS VERIFICATION TEST. Refer to: ABS VERIFICATION TEST .
CHECK THE (B3) LEFT REAR WHEEL SPEED SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition on.
2. Measure the voltage of the (B3) Left Rear Wheel Speed Sensor Signal circuit at the Left Rear Wheel Speed Sensor harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (B3) Left Rear Wheel Speed Sensor Signal circuit for a short to voltage.
  - Perform the ABS VERIFICATION TEST. Refer to: ABS VERIFICATION TEST .
  No
  - Go To 7
CHECK THE (B3) LEFT REAR WHEEL SPEED SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Check for continuity between ground and the (B3) Left Rear Wheel Speed Sensor Signal circuit.
  Is there continuity between ground and the (B3) Left Rear Wheel Speed Sensor Signal circuit?
  
  Yes
  - Repair the (B3) Left Rear Wheel Speed Sensor Signal circuit for a short to ground.
  - Perform the ABS VERIFICATION TEST. Refer to: ABS VERIFICATION TEST .
  No
  - Go To 8
CHECK THE (B3) LEFT REAR WHEEL SPEED SENSOR SIGNAL CIRCUIT FOR AN OPEN OR HIGH RESISTANCE
1. Measure the resistance of the (B3) Left Rear Wheel Speed Sensor Signal circuit between the Left Rear Wheel Speed Sensor harness connector and the ABS module harness connector.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 9
  No
  - Repair the (B3) Left Rear Wheel Speed Sensor Signal circuit for an open or high resistance.
  - Perform the ABS VERIFICATION TEST. Refer to: ABS VERIFICATION TEST .
CHECK THE (B4) LEFT REAR WHEEL SPEED SENSOR SUPPLY CIRCUIT FOR A SHORT TO THE (B3) LEFT REAR WHEEL SPEED SENSOR SIGNAL CIRCUIT
1. Turn the ignition off to the lock position.
2. Check for continuity between the (B4) Left Rear Wheel Speed Sensor Supply circuit and the (B3) Left Rear Wheel Speed Sensor Signal circuit at the Wheel Speed Sensor harness connector.
  Is there continuity between the (B4) Left Rear Wheel Speed Sensor Supply circuit and the (B3) Left Rear Wheel Speed Sensor Signal circuit?
  
  Yes
  - Repair (B4) Left Rear Wheel Speed Sensor Supply circuit for a short to the (B3) Left Rear Wheel Speed Sensor Signal circuit.
  - Perform the ABS VERIFICATION TEST. Refer to: ABS VERIFICATION TEST .
  No
  - Go To 10
REPLACE THE LEFT REAR WHEEL SPEED SENSOR AND RECHECK FOR DTCS
1. Replace the Left Rear Wheel Speed Sensor in accordance with the Service Information. Refer to SENSOR, WHEEL SPEED, REAR, REMOVAL AND INSTALLATION .
2. Perform the ABS VERIFICATION TEST. Refer to: ABS VERIFICATION TEST .
  CAUTION:
  Make sure braking capability is available before road testing.
3. Road test the vehicle over 40 km/h (25 mph).
  NOTE:
  Vehicle must be driven above 40 km/h (25 mph) for the set conditions to be meet.
4. With the scan tool, read ABS DTCs.
  Is the status Active for this DTC?
  
  Yes
  - Replace the Anti-lock Brake System (ABS) Module in accordance with the Service Information. Refer to MODULE, ANTI-LOCK BRAKE SYSTEM (ABS), REMOVAL AND INSTALLATION .
  - Perform the ABS VERIFICATION TEST. Refer to: ABS VERIFICATION TEST .
  No
  - Test complete.