P1689

Circuit Description
The EBTCM pulls the Traction Control Delivered Torque circuit up to approximately 12 volts. The PCM Pulse Width Modulates (PWM) the circuit to ground creating a signal that represents the percentage of engine torque output. The EBTCM uses this PWM signal for traction control. The PCM provides the ground via an internal solid state device called a driver. The primary function of the driver is to supply the ground for the component being controlled. Each driver has a fault line which is monitored by the PCM. If the fault detection circuit senses a voltage Other than what is expected, this DTC will set.

Conditions for Running the DTC
^ Brakes not applied.
^ PCM in Closed Loop fuel control.

Conditions for Setting the DTC
The PCM detects an incorrect voltage on the Traction Control Delivered Torque circuit.
Condition present for 2.5 seconds.

Action Taken When the DTC Sets
^ The PCM stores the DTC information into memory when the diagnostic runs and fails.
^ The Malfunction Indicator Lamp (MIL) will not illuminate.
^ The PCM records the operating conditions at the time the diagnostic fails. The PCM stores this information in the Failure Records.

Conditions for Clearing the MIL/DTC
^ A History DTC will clear after forty consecutive warm-up cycles, if no failures are reported by this or any Other non-emission related diagnostic.
^ A last test failed (Current DTC) will clear when the diagnostic runs and does not fail.
^ Use a scan tool in order to clear the MIL/DTC.
^ Interrupting the PCM battery voltage may or may not clear DTCs. This practice is not recommended.

Diagnostic Aids

Notice: Use the Connector Test Adapter Kit J 35616-A for any test that requires probing the following items:
^ The PCM harness connectors
^ The electrical center fuse/relay cavities
^ The component terminals
^ The component harness connector
Using this kit will prevent damage caused by the improper probing of connector terminals.

Check for an intermittent poor connection at both the PCM and the EBTCM.


Test Description
Number(s) below refer to the step number(s) on the Diagnostic Table.
2. The scan tool displays Fault if a circuit problem is detected.