Acceleration Control

Acceleration Control

1. Verify the customer concern by operating the system.
2. Visually inspect for obvious signs of mechanical or electrical damage.
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4. If the concern is not visually evident, use a fault code reader to retrieve the fault codes before proceeding to the Symptom Chart.

DTC P1240, P1241, P1242

Possible Source(s):
- Accelerator pedal power supply circuit out of range

Action(s) to take:
- GO to Pinpoint Test A.

DTC P1122, P1123, P1215, P1216, P1344

Possible Source(s):
- Accelerator pedal demand sensor output circuit out of range

Action(s) to take:
- GO to Pinpoint Test B.

DTC P0121, P0122, P0123

Possible Source(s):
- Throttle position sensor circuit out of range

Action(s) to take:
- GO to Pinpoint Test C.

DTC P1251, P1658, P1631, P1657

Possible Source(s):
- Throttle motor relay failure

Action(s) to take:
- GO to Pinpoint Test D.

DTC P1243

Possible Source(s):
- Accelerator pedal demand sensor ground; open circuit

Action(s) to take:
- GO to Pinpoint Test E.

DTC P1506, P1507, P1611, P1633

Possible Source(s):
- Engine control module (ECM) failure

Action(s) to take:
- INSTALL a new ECM.

DTC P1254, P1250

Possible Source(s):
- Throttle limp home spring malfunction.

Action(s) to take:
- INSTALL a new throttle motor.