Toyota Hilux Surf 1993 Owner's Manual page 322

No up–shift to overdrive (After warm–up)
Trouble No.3
Road test while shifting manually with sole–
noid wire connector disconnected. Is there
overdrive up–shift in the D position when
shifting from L to 2 to D?
Yes
Connect solenoid wire connector, and while
driving does data link connector 1 Tt terminal
voltage rise from 0 V to 7 V in sequence?
0³V
Is voltage between ECM terminals OD
and E, as follows?
O/D switch turn ON: 10 – 14 V
O/D switch turn OFF: 0 V
Yes
Is voltage between ECM terminals OD, and E,
as follows?
Approx. 5 V
Is voltage between ECM terminals OD,
and E, normal with the cruise control com–
puter connector pulled out?
Is volatge between ECM terminals L4 and E,
as follows?
Transfer shift position H2 or H4: 10 – 14V
Transfer shift position L4: 0 V
AUTOMATIC TRANSMISSION
Are there 12 V between ECM
terminals L and E, when in the D
position?
Faulty Park/Neutral position switch circuit
•
Faulty Park/Neutral position switch
•
2
–
Faulty transmission
0³7V
Faulty transmission
•
Faulty solenoid
•
0³V
Are there 12 V between ECM &
terminals 2 and E, when in the D
position?
Yes
Yes
Try another ECM
Faulty O/D switch harness
•
Faulty O/D switch
•
Yes
Try another ECM
Yes
Faulty cruise control ECU
Yes
Faulty ECM
•
Faulty cruise control wire harness
•
Faulty transfer position switch
•
circuit
Faulty transfer position switch
•
AT–125