Trouble Code 43 (Solenoid Valve 2)

SOLENOID VALVE 2
Explanation
The solenoid valve 2 is checked completely by the control unit during the initialization phase by briefly activating it. The following defects can be stored during operation depending on the status of the solenoid:

- Active: Short to ground, plausibility (driver transistor defective)
- Passive: Short to positive, break

Effect of Defect
Mechanical emergency program.

Possible Cause
Wire or winding of solenoid valve 2 defective, or driver transistor defective.

Troubleshooting
Perform component activation. Measure signals. Ground is constantly applied at control unit Pin 54. When active, control unit switches positive (approx. battery voltage) to Pin 43.