P1297

Tests 1 - 2:

Tests 3 - 7:

Tests 8 - 13:

Tests 14 - 19:

Tests 20 - 21:

SYMPTOM
P1297 - NO CHANGE IN MAP FROM START TO RUN

WHEN MONITORED
With engine speed above 400 rpm but less than 1500 rpm and the throttle blade at closed throttle.

SET CONDITION
Too small a difference is seen between barometric pressure at ignition ON and manifold vacuum (engine running) for 1.72 seconds.

POSSIBLE CAUSES
- MAP sensor wiring harness intermittent
- MAP sensor wiring harness intermittent problem
- MAP sensor wiring harness observable problem
- Vacuum ports restricted
- MAP sensor 5 volt supply circuit open
- MAP sensor 5 volt supply circuit shorted to ground
- MAP sensor signal circuit shorted to sensor ground circuit
- MAP sensor signal circuit shorted to ground
- MAP sensor
- MAP sensor (no press change)
- MAP sensor (press change)
- MAP sensor restricted
- PCM (5 volt supply)
- PCM (signal circuit)