The wheel speed sensor used on this vehicle is a single point magnetic pickup. This sensor produces an AC signal that the EBTCM uses the frequency from to calculate the wheel speed.
All of the following conditions occur:
• | The ignition is ON. |
• | The EBTCM detects one of the following conditions: |
- | An open |
- | A short to ground |
- | A short to voltage |
• | A malfunction DTC is stored. |
• | The ABS/TCS/Stabilitrak® is disabled. |
• | The ABS indicator is turned ON. |
• | The TRACTION CONTROL indicator is turned ON. |
• | The DIC displays the SERVICE STABILITY SYS message. |
• | The condition for DTC is no longer present and you used scan tool Clear DTCs function. |
• | The condition for DTC is no longer present and you used the On-Board Clear DTCs function. |
• | The EBTCM does not detect the DTC in 50 drive cycles. |
• | Perform a thorough inspection of the wiring and the connectors. Failure to carefully and fully inspect wiring and connectors may result in misdiagnosis, causing part replacement with reappearance of the malfunction. |
• | An intermittent malfunction may 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 . |
The numbers below refer to step numbers on the diagnostic table.
Checks for an open in the WSS or WSS CKT.
Checks for a short to ground in the WSS or WSS CKT.
Checks for a short to voltage in the WSS CKT.
Checks for a short to voltage in the WSS CKT.
Step | Action | Value(s) | Yes | No |
---|---|---|---|---|
1 | Was the Diagnostic System Check performed? | -- | Go to Step 2 | Go to Diagnostic System Check |
2 |
Is physical damage of the sensor evident? | -- | Go to Step 3 | Go to Step 4 |
3 | Repair the wiring as necessary. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Diagnostic System Check | -- |
Is the resistance within the specified range? | 850-1350 ohms | Go to Step 12 | Go to Step 5 | |
5 |
Is the resistance within the specified range? | 850-1350 ohms | Go to Step 6 | Go to Step 11 |
6 |
Is the resistance less than the specified value? | 5 ohms | Go to Step 8 | Go to Step 7 |
7 | Repair an open or high resistance in CKT 830. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Diagnostic System Check | -- |
8 |
Is the resistance less than the specified value? | 5 ohms | Go to Step 10 | Go to Step 9 |
9 | Repair an open or high resistance in CKT 873. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Diagnostic System Check | -- |
10 | The malfunction is intermittent. Inspect all connectors and harnesses for damage that may result in an open or high resistance when connected. Refer to Intermittents and Poor Connections in Wiring Systems. Did you complete the repair? | -- | Go to Diagnostic System Check | -- |
11 | Replace the WSS. Refer to Front Wheel Bearing and Hub Replacement in Front Suspension. Did you complete the repair? | -- | Go to Diagnostic System Check | -- |
Use the DMM in order to measure the resistance between terminal 15 and terminal B of the J 39700 . Is the resistance equal to the specified value? | OL (infinite) | Go to Step 19 | Go to Step 13 | |
13 |
Is the resistance equal to the specified value? | OL (infinite) | Go to Step 14 | Go to Step 11 |
14 | Using the DMM in order to measure the resistance between terminal 31 and terminal B of the J 39700 . Is the resistance equal to the specified value? | OL (infinite) | Go to Step 16 | Go to Step 15 |
15 | Repair a short to ground in CKT 830. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Diagnostic System Check | -- |
16 | Using the DMM in order to measure the resistance between terminal 5 and terminal B of the J 39700 . Is the resistance equal to the specified value? | OL (infinite) | Go to Step 17 | Go to Step 18 |
17 | The malfunction is intermittent. Inspect all connectors and harnesses for damage that may result in a short to ground when connected. Refer to Intermittents and Poor Connections in Wiring Systems. Did you complete the repair? | -- | Go to Diagnostic System Check | -- |
18 | Repair a short to ground in CKT 873. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Diagnostic System Check | -- |
Is the voltage greater than the specified value? | 1 V | Go to Step 20 | Go to Step 21 | |
20 | Repair a short to voltage in CKT 830. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Diagnostic System Check | -- |
Use the DMM in order to measure the voltage at terminal 15 of the J 39700 . Is the voltage greater than the specified value? | 1 V | Go to Step 22 | Go to Step 23 | |
22 | Repair a short to voltage in CKT 873. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Diagnostic System Check | -- |
23 | Replace the EBTCM. Refer to Electronic Brake Control Module Replacement . Did you complete the repair? | -- | Go to Diagnostic System Check | -- |