AT/Automatic Transmission — Trouble No. 4 No lock-up (After warm-up), page 27

Trouble No. 4    No lock-up (After warm-up)

Warm up engine
  Coolant temp.: 80°C (176°F)
  ATF temp.:     50 — 80°C (122 — 176°F)

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v

Road test
Connect a voltmeter to check connector
terminals T1 and E1.
Is there 7, 5 or 3V in the lock-up range
while driving?

                                                    Yes ——> • Lock-up solenoid stuck
                                                            • Faulty transmission
                                                            • Faulty lock-up mechanism

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No
v

Is voltage between ECT ECU                          No ——> Faulty brake signal
8K and GND terminals as follows?
Brake pedal depressed: 12V
Brake pedal released:   0V

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Yes
v

• Faulty ECU power source and ground
• Faulty throttle position signal