For 1990-2009 cars
ABS Components
Cell 44: Wheel Speed Sensors and Variable Power Steering Actuator
Handling ESD Sensitive Parts Notice

### Circuit Description

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.

### Conditions for Setting the DTC

All of the following conditions occur:

• | The ignition is ON.

• | The EBCM/EBTCM detects one of the following conditions:

- | An open

- | A short to ground

- | A short to voltage

### Action Taken When the DTC Sets

• | A malfunction DTC is stored.

• | The ABS/TCS is disabled.

• | The ABS indicator isturned ON.

• | The TRACTION OFF indicator is turned ON.

### Conditions for Clearing the DTC

• | 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.

### 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 Intermittents and Poor Connections Diagnosis in Wiring Systems.

### Test Description

The numbers below refer to step numbers on the diagnostic table.

1. This step checks for an open in the wheel speed sensor (WSS) or WSS circuit.

2. This step checks for a short to ground in the WSS or WSS circuit.

3. This step checks for a short to voltage in the WSS circuit.

4. This step checks for a short to voltage in the WSS circuit.

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the ABS Diagnostic System Check? | -- | Go to Step 2 | Go to Diagnostic System Check - ABS
2 |

1. Inspect the WSS wiring and connectors for damage.
2. Inspect the WSS for looseness or damage.

Is physical damage of sensor evident?

--

Go to Step 3

Go to Step 4

3 | Repair the RH front wheel speed sensor as necessary. Refer to Wiring Repairs in Wiring Systems or Front Wheel Bearing and Hub Replacement in Front Suspension. Did you complete the repair? | -- | Go to Diagnostic System Check - ABS | --
4 |

1. Turn OFF the ignition.
2. Disconnect the EBCM/EBTCM.
3. Install the J 39700 universal pinout box using the J 39700-25 cable adapter to the EBCM/EBTCM harness connector only.
4. Use the J 39200 DMM in order to measure the resistance between terminal 25 and terminal 9 of the J 39700 .

Is the resistance within the specified range?

850-1350 ohms

Go to Step 12

Go to Step 5

5 |

1. Disconnect the RH front wheel speed sensor.
2. Use the J 39200 DMM in order to measure the resistance between terminal A and terminal B of the wheel speed sensor connector.

Is the resistance within the specified range?

850-1350 ohms

Go to Step 6

Go to Step 11

6 |

1. Connect a jumper between the RH front wheel speed sensor harness connector terminal B and ground.
2. Use the J 39200 DMM in order to measure the resistance between terminal 9 and terminal B of the J 39700 .

Is the resistance less than the specified value?

5 ohms

Go to Step 8

Go to Step 7

7 | Repair CKT 872 for an open or high resistance. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Diagnostic System Check - ABS | --
8 |

1. Connect a jumper between the RH front wheel speed sensor harness connector terminal A and ground.
2. Use the J 39200 DMM in order to measure the resistance between terminal 25 and terminal B of the J 39700 .

Is the resistance less than the specified value?

5 ohms

Go to Step 10

Go to Step 9

9 | Repair CKT 833 for an open or high resistance. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Diagnostic System Check - ABS | --
10 | The malfunction is intermittent. Inspect all of the connectors and harnesses for damage that may result in an open or high resistance when connected. Refer to Intermittents and Poor Connections . Did you complete the repair? | -- | Go to Diagnostic System Check - ABS | --
11 | Replace the RH front wheel speed sensor. Refer to Front Wheel Bearing and Hub Replacement in Front Suspension. Did you complete the repair? | -- | Go to Diagnostic System Check - ABS | --
12 | Use the J 39200 DMM in order to measure the resistance between terminal 25 and terminal B of the J 39700 . Does the resistance equal the specified value? | OL (infinite) | Go to Step 19 | Go to Step 13
13 |

1. Disconnect the RH front wheel speed sensor.
2. Use the J 39200 DMM in order to measure the resistance between terminal A and ground of the wheel speed sensor connector.

Does the resistance equal the specified value?

OL (infinite)

Go to Step 14

Go to Step 11

14 | Use the J 39200 DMM in order to measure the resistance between terminal 9 and terminal B of the J 39700 . Does the resistance equal the specified value? | OL (infinite) | Go to Step 16 | Go to Step 15
15 | Repair CKT 872 for a short to ground. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Diagnostic System Check - ABS | --
16 | Use the J 39200 DMM in order to measure the resistance between terminal 25 and terminal B of the J 39700 . Does the resistance equal the specified value? | OL (infinite) | Go to Step 17 | Go to Step 18
17 | The malfunction is intermittent. Inspect all of the connectors and harnesses for damage that may result in a short to ground when connected. Refer to Intermittents and Poor Connections . Did you complete the repair? | -- | Go to Diagnostic System Check - ABS | --
18 | Repair CKT 833 for a short to ground. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Diagnostic System Check - ABS | --
19 |

1. Disconnect the RH front wheel speed sensor.
2. Turn ON the ignition leaving the engine OFF.
3. Use the J 39200 DMM in order to measure the voltage at terminal 9 of the J 39700 .

Is the voltage above the specified value?

1 V

Go to Step 20

Go to Step 21

20 | Repair CKT 872 for a short to voltage. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Diagnostic System Check - ABS | --
21 | Use the J 39200 DMM in order to measure the voltage at terminal 25 of the J 39700 . Is the voltage above the specified value? | 1 V | Go to Step 22 | Go to Step 23
22 | Repair CKT 833 for a short to voltage. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Diagnostic System Check - ABS | --
23 | Replace the EBCM/EBTCM. Refer to Electronic Brake Control Module Replacement . Did you complete the repair? | -- | Go to Diagnostic System Check - ABS | --