MR2 L4-1587cc 1.6L DOHC SC (4A-GZE) (1988)
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 select switch in "Normal" and the shift selector into the D range.
d. During a road test (above 10 kph or 6 mph) check that voltage at the terminal ECT is as indicated below for each up-shift position.
e. If the voltage rises from 0 V to 7 V in the sequence shown, the control system is okay.
f.
The voltage could rise anywhere between 0 V - 8 V before the vehicle reaches 10 kph (6 mph), the voltmeter indicates the current gear.
NOTE: Determine the gear position by a light shock or change in engine rpm when shifting.