For 1990-2009 cars
ABS Components
3.8L With Traction Control

### Circuit Description

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

### Conditions for Setting the DTC

• | If a defective requested torque signal is detected by the PCM, a message is broadcasted back to the EBTCM via class 2.

• | DTC C0241 can be set anytime when ignition voltage is present and the EBTCM detects the first class 2 message of a defective requested torque signal from the PCM.

### Action Taken When the DTC Sets

• | A malfunction DTC is stored.

• | The TCS is disabled.

• | The TRAC OFF 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 Diagnosis in Wiring Systems.

• | Possible causes for DTC C0241 to set:

- | Open in the circuit 463.

- | Circuit 463 shorted to ground or voltage.

- | Communication problem.

- | Circuit 463 has a wiring problem, terminal corrosion, or poor connections.

- | PCM not receiving information from the EBTCM.

### Test Description

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

1. Step 4 checks for the proper requested torque value received at the PCM. This value is in percent of torque.

2. Step 5 checks for the proper requested torque value sent from the EBTCM. This value is in newton meters of torque.

3. Step 7 checks for the presence of a pull-up voltage from the PCM.

#### DTC C0241 PCM Indicated Requested 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, G101 and G106 is clean, tight and free of damage. Refer to Power and Grounding Components 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. Use the scan tool to select Engine 2 Data Display in Powertrain.
5. Using the scan tool, observe the Traction Control Desired Torque.

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

80-95 %

Go to Step 5

Go to Step 7

5 |

1. Turn the engine off.
2. Turn the ignition switch to the run position, engine off.
3. Using the scan tool, select ABS/TCS Data Display.
4. Observe the EBTCM to PCM Requested Torque.

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

0 N·m

Go to Step 13

Go to Step 6

6 | Replace the EBTCM. Refer to Electronic Brake Control Module Replacement . Is the replacement complete? | -- | Go to Diagnostic System Check - ABS | --
7 |

1. Turn the ignition switch to the OFF position.
2. Disconnect the EBTCM connector.
3. Install J 39700 Universal Pinout Box using the J 39700-530 cable adapter to the EBTCM harness connector.
4. Turn the ignition switch to the RUN position, engine off.
5. Using J 39200 DMM, measure the voltage between terminals 27 and 15 of J 39700 .

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

4.5-5.5 V

Go to Step 6

Go to Step 10

8 |

1. Turn the ignition switch to the OFF position.
2. Disconnect the PCM connector C1.
3. Turn the ignition switch to the RUN position, engine off.
4. Using J 39200 DMM, measure the voltage between terminals 27 and 15 of J 39700 .

Is the voltage greater than the specified value?

1 V

Go to Step 9

Go to Step 10

9 | Repair CKT 463 for a short to voltage. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Diagnostic System Check - ABS | --
10 |

1. Turn the ignition switch to the OFF position.
2. Using J 39200 DMM, measure the resistance between J 39700 terminals 27 and 15.

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

OL (infinite)

Go to Step 12

Go to Step 11

11 | Repair CKT 463 for a short to ground. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Diagnostic System Check - ABS | --
12 |

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 PCM connector C2 terminal 71.

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

0-2 ohms

Go to Step 13

Go to Step 14

13 | Suspect PCM. Refer to Powertrain OBD System Check in Engine Controls. Is the Repair complete? | -- | Go to Diagnostic System Check - ABS | --
14 | Repair CKT 463 for an open. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Diagnostic System Check - ABS | --