Toyota Hilux Surf 1993 Owner's Manual page 319

AT–122
TROUBLESHOOTING FLOW–CHART
Trouble No. 1 No Shifting
Warm up engine
Engine Coolant temp.: 80
ATF temp.: 50–80 C (122–176
E
Connect a voltmeter to data link connector
1 terminals TT and E, .
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 posi–
tions while driving?
D position .... Overdrive
2 position .... 3rd gear
L position .... 1 st gear
Yes
Continued on page
AUTOMATIC TRANSMISSION
C (176 F)
E E
F)
E
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–123
– Troubleshooting (Electronic Control System)
Transmission faulty
Brake signal faulty