AUTOMATIC TRANSMISSION — Electric Control AT-15 Trouble No. 3 Shift point too high or too low Warm up engine Coolant temp: 80°C (176°F) ATF temp: 50 — 80°C (122 — 176°F) Output diagnostic code (See page AT-8) No indicate Connect a voltmeter to the DG terminal and body. Does DG terminal voltage vary with changes in throttle opening? Yes No Is voltage between ECT ECU terminals BR and GND as follows? OV: Brake pedal released 12V: Brake pedal depressed No ——→ Brake signal faulty Yes • Computer power source and earth faulty • Throttle position signal faulty • DG terminal wire open or short Check voltage between ECT ECU terminals PWR and GND. Power Pattern: 12V OK ——→ Faulty ECT ECU Normal Pattern: 1V Faulty transmission No ——→ Faulty pattern select switch system Diagnosis code ——→ Proceed to trouble No. 1 (AT-12)