Circuit Description

Sub-throttle position sensor detects opening angle of sub-throttle valve and sends signal to ABS ECU. If incorrect signal is input, ABS ECU prohibits TRAC system operation. DTC is set under the following conditions:

• ABS ECU detects deviation of 5 steps or more to the closed side of idle step during sub-throttle initial check.
• ABS ECU detects zero voltage on IDL2 terminal even though sub-throttle is commanded to fully closed position during sub-throttle initial check.
• ABS ECU detects voltage of 1.45 volts or more on VSH terminal while idle switch is on.

Possible causes are:

• Sub-throttle position sensor.
• IDL2 open or short circuit
• Engine Control Module (ECM).
• TRAC ECU.