P2074

Test 1 - Test 4:

Test 5 - Test 8:

Test 9 - Test 12:

Test 13 - Test 16:

Test 17:

SYMPTOM
P2074-MAP SENSOR/TP SENSOR CORRELATION - VACUUM LEAK DETECTED

TEST NOTE
This symptom is diagnosed using the test P0068-MANIFOLD PRESSURE/THROTTLE POSITION CORRELATION - VACUUM LEAK DETECTED.

WHEN MONITORED
During all drive modes.

SET CONDITION
If vacuum drops below 1.59Hg with engine RPM greater than 2000 RPM and closed throttle. One Trip Fault. Three good trips to turn off the MIL.

POSSIBLE CAUSES
- Good trip equal to zero
- Vacuum leak
- Resistance in (F856) 5-volt supply circuit
- (F856) 5-volt supply circuit shorted to ground
- MAP sensor
- Resistance in the (K1) MAP signal circuit
- (K1) MAP signal circuit shorted to ground
- Resistance in the (K900) sensor ground circuit
- TP sensor operation
- Resistance in the (F855) 5-volt supply circuit
- (F855) 5-volt supply circuit shorted to ground
- TP sensor
- Resistance in the (K22) TP sensor No.1 signal circuit
- (K22) TP sensor No.1 signal circuit shorted to ground
- Resistance in the (K900) sensor ground circuit
- PCM