GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1999 🢒 Seville 🢒 Brakes 🢒 Antilock Brake System 🢒 DTC C1232 LF Wheel Speed Circuit Open or Shorted

Object Number: 106434 Size: MF
ABS Components
Cell 44: Wheel Speed Sensors
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 that the EBTCM uses the frequency from to calculate the wheel speed.

Conditions for Setting the DTC

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

Action Taken When the DTC Sets
    • 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.

Conditions for Clearing the DTC
    • 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.

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 or circuit.

    2.

  2. This step checks for a short to ground in the wheel speed sensor or circuit.

    3.

  3. This step checks for a short to voltage in the wheel speed sensor high circuit.

    4.

  4. This step checks for a short to voltage in the wheel speed sensor low 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 wheel speed sensor wiring and connectors for damage.
  2. Inspect the wheel speed sensor for looseness or damage.

Is physical damage of the sensor or wiring evident?

--

Go to Step 3

Go to Step 4

3

Repair 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 EBTCM harness connector.
  3. Install the J 39700 universal pinout box using the J 39700-25 cable adapter to the EBTCM harness connector only.
  4. Use a J 39200 DMM in order to measure the resistance between the J 39700 terminal 15 and terminal 31.

Is the resistance within the specified range?

850-1350 ohms

Go to Step 12

Go to Step 5

5
  1. Disconnect the wheel speed sensor connector.
  2. Use a J 39200 DMM in order to measure the resistance between the wheel speed sensor connector terminal A and terminal B.

Is the resistance within the specified range?

850-1350 ohms

Go to Step 6

Go to Step 11

6
  1. Connect a jumper from the wheel speed sensor harness connector terminal B to ground.
  2. Use a J 39200 DMM in order to measure the resistance between the J 39700 terminal 31 and terminal B.

Is the resistance less than the specified value?

5 ohms

Go to Step 8

Go to Step 7

7

Repair the open or high resistance in CKT 830. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Diagnostic System Check - ABS

--

8
  1. Connect a jumper from the wheel speed sensor harness connector terminal A to ground.
  2. Use J 39200 DMM in order to measure the resistance between the J 39700 terminal 15 and terminal B.

Is the resistance less than the specified value?

5 ohms

Go to Step 10

Go to Step 9

9

Repair the open or high resistance in CKT 873. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Diagnostic System Check - ABS

--

10

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 Diagnosis in Wiring Systems.

Did you complete the repair?

--

Go to Diagnostic System Check - ABS

--

11

Replace the 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 a J 39200 DMM in order to measure the resistance between the J 39700 terminal 15 and terminal B.

Is the resistance within the specified range?

OL (infinite)

Go to Step 19

Go to Step 13

13
  1. Disconnect the wheel speed sensor connector.
  2. Use a J 39200 DMM in order to measure the resistance between the wheel speed sensor connector terminal A and ground.

Is the resistance within the specified range?

OL (infinite)

Go to Step 14

Go to Step 11

14

Use a J 39200 DMM in order to measure the resistance between the J 39700 terminal 31 and terminal B.

Is the resistance within the specified range?

OL (infinite)

Go to Step 16

Go to Step 15

15

Repair the short to ground in CKT 830. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Diagnostic System Check - ABS

--

16

Use a J 39200 DMM in order to measure the resistance between the J 39700 terminals 15 and B.

Is the resistance within the specified range?

OL (infinite)

Go to Step 17

Go to Step 18

17

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 Diagnosis in Wiring Systems.

Did you complete the repair?

--

Go to Diagnostic System Check - ABS

--

18

Repair the short to ground in CKT 873. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Diagnostic System Check - ABS

--

19

  1. Disconnect the wheel speed sensor connector.
  2. Turn ON the ignition, with the engine OFF.
  3. Use a J 39200 DMM in order to measure the voltage between the J 39700 terminal 31 and ground.

Is the voltage greater than the specified value?

1 V

Go to Step 20

Go to Step 21

20

Repair the short to voltage in CKT 830. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Diagnostic System Check - ABS

--

21

Use a J 39200 DMM in order to measure the voltage between the J 39700 terminal 15 and ground.

Is the voltage greater than the specified value?

1 V

Go to Step 22

Go to Step 23

22

Repair the short to voltage in CKT 873. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Diagnostic System Check - ABS

--

23

Replace the EBTCM. Refer to Electronic Brake Control Module Replacement .

Did you complete the repair?

--

Go to Diagnostic System Check - ABS

--