P2074

Test 1 - Test 4:

Test 5 - Test 8:

Test 9 - Test 12:

Test 13 - Test 16:

Test 17 - Test 18:

SYMPTOM
P2074-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 (K6) 5 volt supply circuit
- Resistance to ground in MAP (K6) 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 TP sensor (K6) 5 volt supply circuit
- Resistance to ground in TP sensor (K6) 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