DTC 63

Diagnostic Chart:

Shift Solenoid Circuit:

Circuit Description:
Shift solenoid no. 1 and shift solenoid no. 2 are used together to electronically control the shifting of the transaxle from 1st gear to overdrive. The PCM outputs system voltage to turn ON (energize) or remove voltage to turn OFF (deenergize) either solenoid when it deems necessary. The transaxle shifts with the combination of both solenoids being turned ON and OFF. Shift solenoid No. 1 is normally ON in 1st and 2nd gear only, and never ON in 3rd or overdrive. Shift solenoid No. 2 is normally ON in 2nd and 3rd gear only, and never ON in 1st or overdrive. Overdrive is obtained when both shift solenoids are OFF.

DTC 63 will set if either of the two following conditions are met:

^ Solenoid resistance is 8 ohms or lower (shorted circuit) when solenoid is commanded ON.

^ Solenoid resistance is 100 Kohms or higher (open circuit) when solenoid is commanded OFF.

Test Description: Numbers below refer to circled numbers on the diagnostic chart.

1. This determines if the PCM is faulty, or if vehicle is equipped with cruise control, if the cruise control module is faulty.

2. This checks for a short to ground in the solenoid wiring.

3. This determines if there is an open in the wiring or if the solenoid is faulty.

Diagnostic Aids:
Check grounds on transaxle for a clean and tight connection.

Check for poor connections at component and inline harness connector terminal connections before replacing components. After repairs have been made, repeat the PCM OBD System Check to ensure system is functioning normally.