Engine Brake Does Not Operate In ``D1'' Range

1. Faulty or misadjusted inhibitor switch.
2. Improperly adjusted control linkage.
3. Faulty or misadjusted throttle sensor.
4. Faulty revolution sensor.
5. Faulty speed sensor.
6. Faulty shift solenoid ``A.''
7. Faulty control valve assembly.
8. Faulty overrun clutch.
9. Faulty low and reverse brake band.