Throttle Valve Opening Circuit

Fig. 4 Control Unit Electrical Connector Terminal Identification.:

1. Check voltage between terminal 2 and body ground, Fig. 4.

Fig. 5 Throttle Valve Opening Signal Circuit Test.:

2. If duty signal appears, Fig. 5, then throttle valve opening signal is good.
3. If duty signal does not appear, check wires, fuses, electrical connectors and ECM.