AT/Automatic Transmission — Trouble No. 2 No shifting, page 13

AUTOMATIC TRANSMISSION — Electric Control                                AT-13

Trouble No. 2      No shifting

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

Output diagnostic code                                    Diagnosis code ——> Proceed to trouble No. 1 (AT-12)
(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                No ——> Brake signal
           |                    BR and GND as follows?                                    faulty
           |                    OV: Brake pedal released
           |                    12V: Brake pedal depressed
           |                                  |
           |                                 Yes
           |                                  |
           |                    •    Computer power source and earth faulty
           |                    •    Throttle position signal faulty
           |                    •    DG terminal wire open or short
           |
           |
Disconnect ECT ECU connector and road test.                      No
Does the transmission operate in the respective        ———————————————> Transmission faulty
gear when in the following ranges while driving?
D range ...... Overdrive
2 range ...... 3rd gear
L range ...... 1st gear
           |
          Yes
           |
Continued on page AT-14