P0068

Test 1 - 4:

Test 5 - 8:

Test 9 - 12:

Test 13 - 16:

Test 17 - 18:

SYMPTOM
P0068-MANIFOLD PRESSURE/THROTTLE POSITION CORRELATION - HIGH FLOW/VACUUM LEAK

WHEN MONITORED
Engine Running, during all drive modes.

SET CONDITION
If vacuum drops below 1.5 Hg with engine rpm greater than 2000 rpm at closed throttle.

POSSIBLE CAUSES
- Good Trip Equal To Zero
- Vacuum Leak
- High Resistance In MAP (K7) 5 volt Supply Circuit
- Resistance To Ground In MAP (K7) 5 volt Supply Circuit
- MAP Sensor
- High Resistance In (K1) MAP Signal Circuit
- Resistance To Ground In (K1) MAP Signal Circuit
- High Resistance In (K4) MAP Ground Circuit
- PCM
- TP Sensor Operation
- High Resistance In (K6) TP Sensor 5 volt Supply Circuit
- Resistance To Ground In (K6) TP Sensor 5 volt Supply Circuit
- TP Sensor
- High Resistance In (K22) TP Signal Circuit
- Resistance TO Ground IN (K22) TP Sensor Signal Circuit
- High Resistance In TP (K4) Sensor Ground Circuit
- PCM