Toyota Hilux Surf 1993 Owner's Manual page 209

AT–12
General Troubleshooting
Problem
Fluid discolored or
smells burnt
Vehicle does not
move in any forward
position or reverse
Shift lever position
incorrect
Harsh engagement
into any drive position
Delayed 1–2, 2–3 or
3–0/D up–shift, or
down–shift from
O/D–3 or 3–2 then
shifts back to O/D
or 3
Slips on 1–2, 2–3 or
3–0/D up–shift, or
slips or shudders on
acceleration
AUTOMATIC TRANSMISSION
Possible cause
Fluid contaminated
Torque converter clutch faulty
Transmission faulty
Manual linkage out of adjustment
Valve body or primary regulator faulty
Parking lock pawl faulty
Torque converter clutch faulty
Converter drive plate broken
Oil pump intake screen blocked
Transmission faulty
Manual linkage out of adjustment
Manual valve and lever faulty
Transmission faulty
Throttle cable out of adjustment
Valve body or primary regulator faulty
Accumulator pistons faulty
Transmission faulty
Throttle cable out of adjustment
Valve body faulty
Governor body faulty
Manual linkage out of adjustment
Throttle cable out of adjustment
Valve body faulty
Transmission faulty
– Troubleshooting (General Troubleshooting
Remedy
Replace fluid
Replace torque converter clutch
Disassemble and inspect
transmission
Adjust linkage
Inspect valve body
Inspect parking lock pawl
Replace torque converter clutch
Replace drive plate
Clean screen
Disassemble and inspect
transmission
Adjust linkage
Inspect valve body
Disassemble and inspect
transmission
Adjust throttle cable
Inspect valve body
Inspect accumulator pistons
Disassemble and inspect
transmission
Adjust throttle cable
Inspect valve body
Inspect governor body
Adjust linkage
Adjust throttle cable
Inspect valve body
Disassemble and inspect
transmission
Remark *: Refer to A43D Automatic Trans–
mission Repair Manual.
(Pub. No. RM 272U )
Page
AT–14
AT–40
AT–15
AT–31
AT–40
AT–40
AT–15
AT–15
AT–15
AT–15
AT–15