NO UPSHIFT 1ST To 2ND
- Check solenoid No. 1 and No. 2 circuit. See CODE 62 and CODE 63 in TESTS W/CODES article.
- Check main throttle position sensor circuit. See MAIN THROTTLE POSITION SENSOR CIRCUIT chart in TESTS W/CODES article.
- Check speed sensor No. 1. See CODE 42 in TESTS W/CODES article.
- Check speed sensor No. 2. See CODE 61 in TESTS W/CODES article.
- Check transmission for mechanical failure.
- Check ECU. See SYSTEM/COMP TESTS article.