GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1998 🢒 Catera 🢒 Brakes 🢒 Antilock Brake System 🢒 DTC C0244 PWM Delivered Torque Malfunction

Object Number: 262152 Size: MF
ABS Components
ABS/TCS Schematics

Circuit Description

Traction Control is simultaneously controlled by the EBTCM and the ECM. The PCM sends a Delivered Torque message via a Pulse Width Modulated (PWM) signal to the EBTCM confirming the delivered torque level for proper Traction Control system operation. The EBTCM supplies the pull up voltage.

Conditions for Setting the DTC

DTC C0244 can be set anytime when ignition voltage is present. A malfunction exists if the PWM signal is out of range or no signal is received for a period of 2 seconds.

Action Taken When the DTC Sets
    • A malfunction DTC is stored.
    • The TCS is disabled.
    • The TC indicator is turned on. The ABS remains functional.

Conditions for Clearing the DTC
    • Condition for DTC is no longer present and scan tool clear DTC function is used.
    • 100 ignition cycles have passed with no DTC(s) 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.
    • If an intermittent malfunction exists refer to General Electrical Diagnostic Procedures in Wiring Systems.
    • Possible causes for DTC C0244 to set:
       - Open in the delivered torque circuit.
       - The delivered torque circuit shorted to ground or voltage.
       - Communication frequency problem.
       - Communication duty cycle problem.
       - The delivered torque circuit has a wiring problem, terminal corrosion, or poor connections.
       - EBTCM not receiving information from the ECM.

Test Description

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

  1. Checks for proper delivered torque value.

    2.

  2. Checks for the presence of a pull-up voltage from the EBTCM.

DTC C0244 PWM Delivered Torque Malfunction

Step

Action

Value(s)

Yes

No

1

Was the Diagnostic System Check performed?

--

Go to Step 2

Go to Diagnostic System Check - ABS

2

Check that ground G103 is clean, tight and free of damage. Refer to Component Location in Wiring Systems.

Were any loose, damaged, or corroded grounds found?

--

Go to Step 3

Go to Step 4

3

Repair ground as necessary. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Diagnostic System Check - ABS

--

4

  1. Turn the ignition switch to the OFF position.
  2. Install the scan tool.
  3. Start the engine.
  4. Using the scan tool, observe the ECM to EBTCM delivered engine torque.
  5. With the engine running, momentarily press the accelerator while observing the delivered engine torque.

Did the delivered engine torque fluctuate within the range specified in the value(s) column?

20-60 %

Go to Step 5

Go to Step 6

5

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

Is the replacement complete?

--

Go to Diagnostic System Check - ABS

--

6

  1. Turn the ignition switch to the OFF position.
  2. Disconnect the ECM connector.
  3. Disconnect the TCM connector.
  4. Disconnect the EBTCM connector.
  5. Install J 39700 Universal Pinout Box using the J 39700-280 cable adapter to the EBTCM harness connector and the EBTCM connector.
  6. Turn the ignition switch to the RUN position, engine off.
  7. Using J 39200 DMM, measure the voltage between terminals 27 and 19 of J 39700 .

Is the voltage within the range specified in the value(s) column?

Above 10V

Go to Step 7

Go to Step 9

7
  1. Turn the ignition switch to the OFF position.
  2. Disconnect the J 39700-25 cable adapter from the EBTCM leaving the cable adapter connected to the EBTCM harness only.
  3. Turn the ignition switch to the RUN position, engine off.
  4. Using J 39200 DMM, measure the voltage between terminals 27 and 19 of J 39700 .

Is the voltage within the range specified in the value(s) column?

Greater than 1V

Go to Step 8

Go to Step 11

8

Repair the delivered torque circuit for a short to voltage. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Diagnostic System Check - ABS

--

9
  1. Turn the ignition switch to the OFF position.
  2. Using J 39200 DMM, measure the resistance between J 39700 terminals 27 and 19.

Is the resistance within the range specified in the value(s) column?

OL (infinite)

Go to Step 5

Go to Step 10

10

Repair the delivered torque circuit for a short to ground. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Diagnostic System Check - ABS

--

11
  1. Turn the ignition switch to the OFF position.
  2. Using J 39200 DMM, measure the resistance between terminal 27 of J 39700 and the ECM connector terminal 83.

Is the resistance within the range specified in the value(s) column?

0-2 ohms

Go to Step 12

Go to Step 13

12

Suspect ECM. Refer to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls.

Is the Repair complete?

--

Go to Diagnostic System Check - ABS

--

13

Repair the delivered torque circuit for an open. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Diagnostic System Check - ABS

--