Troubleshooting

Fig. 65 Vacuum chart.:

NO VACUUM IS AVAILABLE FOR CONDITIONS 2 & 4

1. Check for vacuum at the inlet and outlet of thermovalve C.
2. If vacuum is present at inlet but none at outlet, replacethermovalve.
3. If vacuum is not present at inlet, check routing of vacuum hoses and repair or replace as necessary.

VACUUM IS AVAILABLE FOR CONDITION 1 OR VACUUM IS GREATER THAN 2 IN. HG. FOR CONDITION 3

1. Replace EGR control valve and check for proper vacuum hose routing.