Toyota MR2 1988 Repair Manual page 522

AT-4
AUTOMATIC TRANSAXLE- Troubleshooting
General Troubleshooting (Cont' d)
Problem
Possible cause Remedy
Page
Drag. binding or Control cable out of adjustment Adjust control cable
AT-6
tie-up on 1-2. 2-3
Valve body faulty Inspect valve body
AT-96
or 3-0D up-shift
Transmission faulty
Disassemble and inspect AT-50
transmission
No lock-up in 2nd,
Electronic control faulty
'
I
Inspect electronic control AT-15
3rd or OD
Valve body faulty Inspect valve body
AT-96
Solenoid valve faulty Inspect solenoid valve AT-27
Transmission faulty Disassemble and inspect AT-50
transmission
Harsh down-shift Throttle cable out of adjustment
I
Adjust throttle cable AT-6
Valve body faulty Inspect valve body AT-96
Transmission faulty Disassemble and inspect
AT-50
transmission
No down-shift when Valve body faulty Inspect valve body AT-96
coasting
Solenoid valve faulty Inspect solenoid valve AT-27
Electronic control faulty Inspect electronic control AT-15
Down-shift occur$ too
Throttle cable out of adjustment Adjust throttle cable AT-6
quickly or too late
Valve body faulty Inspect valve body AT-96
while coasting
Transmission faulty Disassemble and inspect AT-50
transmission
Solenoid valve faulty Inspect solenoid valve AT-27
Electronic control faulty
Inspect electronic control AT-15
No OD-3, 3-2 or 2-1 Throttle cable out of adjustment Adjust throttle cable AT-6
kick-down
Solenoid valve faulty Inspect solenoid valve AT-96
Electronic control faulty Inspect electronic control
AT-15
Valve body faulty Inspect valve body
AT-.96
No engine braking Solenoid valve faulty Inspect solenoid valve AT-27
in 2 or L range
Electronic control faulty Inspect electronic control
AT-15
Valve body faulty Inspect valve body AT-96
Transmission faulty Disassemble and inspect
AT-50
transmission