Circuit Description

Constant battery voltage is supplied to +BM terminal of ECM as the power source for the Electronic Throttle Control System (ETCS). DTC is set when battery voltage does not exist at +BM terminal of ECM. If DTC P1127 exists, ECM will turn off the power to throttle control motor and throttle valve is closed by the return spring. Possible causes are:

• Defective fuse.
• Power source for ETCS circuit is open or shorted.
• Defective ECM.