Toyota Hilux Surf 1993 Owner's Manual page 385

AT–188
Trouble No.2 Shift point too high or too low
Warm up engine
Engine coolant temp.: 80
E
ATF temp.: 50–80 C (122–176
E
Connect a voltmeter to data link connector 1
terminals T and El. Does T
T
age vary with changes in throttle opening?
Yes
Check voltage between ECM terminals P and
El.
Power pattern: 10–14 V
Normal pattern: 0–2 V
AUTOMATIC TRANSMISSION
C (176 F)
E
F)
E
terminal volt–
T
Is voltage between ECM terminals STP and
E as follows?
1
0 V: Brake pedal released
10–14 V: Brake pedal depressed
Yes
• Throttle position signal faulty
• T terminal wire open or short
T
– Troubleshooting (Electronic Control System)
• Faulty ECM
• Faulty transmission
Faulty pattern select switch system
Brake signal
faulty