Toyota Supra 1990 Manual page 210

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EFI SYSTEM - Troubleshooting with Volt/Ohmmeter (7M-GE)

Throttle valve open

Throttle valve fully closed

Throttle valve fully open

Throttle Position Sensor

There is no voltage between ECU terminals IDL and E2.

(lG SW ON) (Throttle valve open)

Check that there is voltage between ECU terminal +B (+B 1)

and body ground. (lG SW ON)

Check wiring between ECU terminal E1 and body

Try another ECU.

Repair or replace.

Refer to No.1.

(See page F 1-35)

Repair or replace.

Check throttle position

Repair or replace

Check wiring between ECU and

th rottle position sensor.

throttle position sensor.

Try another ECU.

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