Toyota Hilux Surf 1993 Owner's Manual page 386

No up–shift to overdrive (After warm–up)
Trouble No–3
Road test while shifting manually with solenoid
wire connector disconnected. Is there over–
drive 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 T
voltage rise from 0 V to 7 V in sequence?
0R5V
Is voltage between ECM terminals OD2 and E,
as follow?
O/D switch turn ON: 10–14V
O/D switch turn OFF: 0 V
Yes
Is voltage between EC M terminals OD, and E ,
as follows?
Approx. 5 V
Is voltage between ECM terminals OD, and E,
as normal with the cruise control ECU connec–
tor pulled out?
• Faulty ECM
• Faulty cruise control wire harness
AUTOMATIC TRANSMISSION
terminal
T
Are there 10–14 V between ECM
terminals L and E , when in the D po–
sition?
– Troubleshooting (Electronic Control System)
Faulty transmission
0R5V
• Faulty transmission
• Faulty solenoid
Are there 10–14 V between ECM
terminals 2 and E, when in the D po–
sition?
Yes
• Faulty park/neutral position switch circuit
• Faulty park/neutral position switch
Try another ECM
• Faulty O/D switch harness
• Faulty O/D switch
Yes
Try another ECM
Yes
Faulty cruise control ECU
Yes
AT–189