DTC 93

DTC 93 Chart:

Traction Control Module To PCM Circuit:

CIRCUIT DESCRIPTION
The traction control system Pulse Width Modulated (PWM) link is used by the Powertrain Control Module (PCM) to determine the amount of torque reduction demanded by the traction control system. Depending on the duty cycle of the PWM signal, the PCM will retard spark and shut off fuel delivery for up to 4 cylinders to reduce engine torque. If the PCM does not detect the traction control PWM signal, the PCM will not allow 1st gear starts, DTC 93 will be set, and traction control will be disabled.

DTC 93 WILL SET WHEN
- No traction control system failure detected.
- No traction control system PWM signal pulses detected by the PCM.

ACTION TAKEN (PCM WILL DEFAULT TO)
DTC 93 does not illuminate the Malfunction Indicator Lamp (MIL) (Service Engine Soon) and traction control will be disabled.

DTC 93 WILL CLEAR WHEN
The fault no longer exists.

DTC CHART TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.

1. Checking for a traction control communication code also set because that determines if it is just a PCM problem or not.
2. Checking for the correct output voltage from the EBTCM (between 4 and 8 volts).
3. Checking CKT 464 for a short to voltage.
4. Checking CKT 464 for a short to ground.
5. Checking CKT 464 for an open.
6. Checking for the correct PCM input voltage (between 1.5 and 3.5 volts).
7. Checking CKT 463 for an open.
8. Checking CKT 463 for a short to voltage.
9. Checking CKT 463 for a short to ground.
10. Checking if the EBTCM is able to request desired torque from the PCM.