Supra L6-3.0L DOHC Turbo (7M-GTE) (1987)
Data Link Connector, A/T: Testing and Inspection
INSPECT ECT TERMINAL VOLTAGE
1. INSPECT THROTTLE POSITION SENSOR SIGNAL
a. Turn the ignition switch to ON. Do not start the engine.
b. Connect a voltmeter to terminals ECT and E(1).
c. While slowly depressing the accelerator pedal, check that ECT terminal voltage rises in sequence.
If the voltage does not change in proportion to the throttle opening angle, there is a malfunction in the throttle position sensor or circuit.
2. INSPECT BRAKE SIGNAL
a. Depress the accelerator pedal until the ECT terminal indicates 8 V.
b. Depress the brake pedal and check the voltage reading from the ECT terminal.
Brake pedal depressed.........0 V
Brake pedal release...............8 V
If not as indicated, there is a malfunction in either the stop light switch or circuit.
3. INSPECT EACH UP-SHIFT POSITION
a. Warm up the engine.
Coolant temperature: 80°C (176°F)
b. Turn the OD switch to "ON".
c. Place the pattern selection switch in "Normal" and the shift selector into the D range.
d. During a road test (above 10 km/h or 6 mph) check that voltage at the ECT terminal is as indicated below for each up-shift position.