P1297

Test 1 - 2:

Test 3 - 7:

Test 8 - 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 not running) and manifold vacuum for 8.80 seconds (engine running).

POSSIBLE CAUSES
- Good trip equal to zero
- MAP sensor voltage below 3.19 Volts
- (F855) 5-Volt supply circuit shorted to ground
- (F855) 5-Volt supply circuit open
- MAP sensor
- (k1) Map sensor signal circuit shorted to ground
- (k1) Map sensor signal circuit shorted to (K900) sensor ground circuit
- MAP sensor vacuum port
- PCM