The wheel speed sensor used on this vehicle is a single point magnetic pickup. This sensor produces an AC signal. The EBCM/EBTCM uses the frequency of the AC signal to calculate the wheel speed.
All of the following conditions exists for 2.5 seconds:
• | The suspect wheel speed equals zero. |
• | The other wheel speeds are greater than 8 km/h (5 mph). |
• | The other wheel speeds are within 11 km/h (7 mph) of each other. |
• | A malfunction DTC is stored. |
• | The ABS/TCS is disabled. |
• | The ABS indicator isturned ON. |
• | The TRACTION OFF indicator is turned ON. |
• | The condition for the DTC is no longer present and you used the scan tool Clear DTC function. |
• | The EBCM/EBTCM does not detect the DTC in 50 drive cycles. |
• | It is very important that a thorough inspection of the wiring and connectors be performed. Failure to carefully and fully inspect wiring and connectors may result in misdiagnosis, causing part replacement with reappearance of the malfunction. |
• | An intermittent malfunction can be caused by poor connections, broken insulation, or a wire that is broken inside the insulation. |
• | If an intermittent malfunction exists, refer to Intermittents and Poor Connections Diagnosis in Wiring Systems. |
The numbers below refer to step numbers on the diagnostic table.
This step tests the resistance of the wheel speed sensor (WSS).
This step tests if the WSS circuits are shorted together.
Step | Action | Value(s) | Yes | No |
---|---|---|---|---|
1 | Was the ABS Diagnostic System Check performed? | -- | Go to Step 2 | |
2 |
Is physical damage of sensor evident? | -- | Go to Step 7 | Go to Step 3 |
Is the resistance equal to the specified value? | 850-1350 ohms | Go to Step 4 | Go to Step 7 | |
4 |
Is the AC voltage above the specified value? | 100 mV | Go to Step 5 | Go to Step 7 |
Is the resistance equal to the specified value? | OL (Infinite) | Go to Step 6 | Go to Step 8 | |
6 |
Does the DTC reset as a current DTC? | -- | Go to Step 9 | |
7 | Replace the RH rear wheel speed sensor. Refer to Rear Wheel Bearing and Hub Replacement in Rear Suspension. Is the repair complete? | -- | Go to Step 10 | -- |
8 | Repair the short between CKT 882 and CKT 883. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 10 | -- |
9 | Replace the EBCM/EBTCM. Refer to Electronic Brake Control Module Replacement . Is the repair complete? | -- | Go to Step 10 | -- |
10 | Carefully test drive the vehicle above 24 km/h (15 mph) while monitoring a scan tool for at least 30 seconds. Does the DTC set as a current DTC? | -- | Go to Step 2 |