P1297

Test 1 - 2:

Test 3 - 8:

Test 9 - 10:

SYMPTOM
P1297-NO CHANGE IN MAP FROM START TO RUN

WHEN MONITORED
With engine RPM +/- 64 of target idle and the throttle blade at closed throttle.

SET CONDITION
Too small of a difference is seen between barometric pressure with ignition on (engine running) and manifold vacuum for 8.80 seconds.

POSSIBLE CAUSES
- Good trip equal to zero
- Map sensor vacuum port
- Map sensor voltage below 3.19 volts
- (K7) 5 volt supply circuit open
- (K7) 5 volt supply circuit shorted to ground
- Map sensor
- (K1) Map sensor signal circuit shorted to ground
- (K1) Map sensor signal circuit shorted to (K4) sensor ground circuit
- PCM