| CAUTION | If ECM replacement is instructed in following testing, always ensure ECM harness connector and ground circuit are okay. If either are suspect, repair and repeat testing to confirm ECM malfunction. If ECM is replaced, ECM must be programmed with proper ignition key code for engine immobilizer system. For programming procedures, see COMPUTER RELEARN PROCEDURES - IMPORT article in GENERAL INFORMATION. |
Circuit Description
Magnetic clutch is mounted between throttle control motor and throttle valve, and engages throttle control motor to throttle valve. If electronic throttle control system has a malfunction, magnetic clutch separates throttle control motor from throttle valve. Magnetic clutch and throttle control motor are one unit and must be replaced together. If DTC P1126 is set, ECM shuts down power to throttle control motor and electromagnetic clutch.
DTC P1126 is set when ECM continuously detects magnetic clutch current of 1.4 amps or more, or .4 amp or less for .8 second. DTC P1126 is also set when ECM continuously detects magnetic clutch current of one amp or more, or .8 amp or less for 1.5 seconds. Possible causes are
- Open or short in magnetic clutch circuit
- Faulty magnetic clutch.
- Faulty ECM.
Diagnostic Aids
Using scan tool, read freeze frame data. Freeze frame records engine conditions when malfunction is detected.