Circuit Description
The 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.
Conditions for Setting the DTC
The DTC can be set any time the ignition is in the ON position, and the EBTCM senses an open, a short to ground, or a short to battery.
Action Taken When the DTC Sets
ABS/TCS/Active Handling (if equipped with RPO JL4) are disabled.
| • | Indicators that turn on: |
| - | ABS indicator |
| - | Car Icon (TCS indicator) |
| • | Messages displayed on the DIC: |
| - | Service ABS |
| - | Service Traction System |
| - | Service Active HNDLG (if equipped with Active Handling RPO JL4) |
Conditions for Clearing the DTC
| • | Condition for DTC is no longer present and scan tool clear DTC function is used. |
| • | Fifty ignition cycles have passed with no DTCs detected. |
Diagnostic Aids
| • | 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 Testing for Electrical Intermittents in Wiring Systems. |
Test Description
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? | -- | ||
2 |
Is physical damage of sensor evident? | -- | ||
3 | Repair as necessary. Is the repair complete? | -- | -- | |
Is the resistance within the range specified in the value(s) column? | 850-1350ohms | |||
5 |
Is the resistance within the range specified in the value(s) column? | 850-1350ohms | ||
6 | Using J 39200 DMM, measure the resistance between terminals 12 of J 39700 and A of the LR Wheel Speed Sensor harness connector. Is the resistance within the range specified in the value(s) column? | 0-5ohms | ||
7 | Repair CKT 884 for an open or high resistance. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
8 | Using J 39200 DMM, measure the resistance between terminals 28 of J 39700 and B of the LR Wheel Speed Sensor harness connector. Is the resistance within the range specified in the value(s) column? | 0-5ohms | ||
9 | Repair CKT 885 for an open or high resistance. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
10 | Malfunction is intermittent. Inspect all connectors and harnesses for damage that may result in an open or high resistance when connected. Refer to Testing for Electrical Intermittents in Wiring Systems. Is the repair complete? | -- | -- | |
11 | Replace the Wheel Speed Sensor. Refer to Rear Wheel Bearing and Hub Replacement in Rear Suspension. Is the replacement complete? | -- | -- | |
Using J 39200 DMM, measure the resistance between terminals 28 and B of J 39700 . Is the resistance within the range specified in the value(s) column? | OL (infinite) | |||
13 |
Is the resistance within the range specified in the value(s) column? | OL (infinite) | ||
14 | Using J 39200 DMM, measure the resistance between terminals 12 and B of J 39700 . Is the resistance within the range specified in the value(s) column? | OL (infinite) | ||
15 | Repair CKT 884 for a short to ground. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
16 | Using J 39200 DMM, measure the resistance between terminals 28 and B of J 39700 . Is the resistance within the range specified in the value(s) column? | OL (infinite) | ||
17 | Malfunction is intermittent. Inspect all connectors and harnesses for damage that may result in a short to ground when connected. Refer to Testing for Electrical Intermittents in Wiring Systems. Is the repair complete? | -- | -- | |
18 | Repair CKT 885 for a short to ground. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
Is the voltage within the range specified in the value(s) column? | Above 1V | |||
20 | Repair CKT 884 for a short to voltage. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
Using J 39200 DMM, measure the voltage at terminal 28 of J 39700 . Is the voltage within the range specified in the value(s) column? | Above 1V | |||
22 | Repair CKT 885 for a short to voltage. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
23 | Replace the EBTCM. Refer to Electronic Brake Control Module Replacement . Is the replacement complete? | -- | -- |
