Electronic Control System - Troubleshooting Flow-Chart; No Shifting - Toyota Hilux Surf 1993 Owner's Manual

TROUBLESHOOTING FLOW–CHART
Trouble No. 1 No Shifting
Warm up engine
Engine coolant temp.: 80E C (176E F)
ATF temp.: 50–80E C (122–176E F
Connect a voltmeter to data link connector 1
terminals TT and El. Does TT terminal voltage
vary with changes in throttle opening?
Yes
Disconnect solenoid wire connector and road
test. Does the transmission operate in the
respective gear when in the following positions
while driving?
D position ..... Overdrive
2 position ..... 3rd gear
L position ..... 1 st gear
Yes
Continued on page
AUTOMATIC TRANSMISSION
)
Is voltage between ECM terminals STP and E,
as follows?
0 V: Brake pedal released
10–14 V: Brake pedal depressed
Yes
• Throttle position signal faulty
• TT terminal wire open or short
AT–66
– Troubleshooting (Electronic Control System)
Transmission faulty
AT–65
Brake signal
faulty