P1297

Tests 1 - 3:

Tests 4 - 9:

Test 10:

SYMPTOM
P1297 - NO CHANGE IN MAP FROM START TO RUN

WHEN MONITORED
Engine is idling with a stable rpm (rpm fluctuation < 64 rpm) and the vehicle is not moving.

SET CONDITION
Too small a difference is seen between barometric pressure at ignition ON and manifold vacuum.

POSSIBLE CAUSES
- MAP sensor 5-volt supply circuit open
- MAP Sensor wiring harness intermittent defect
- Vacuum ports restricted or defective
- Manifold absolute pressure sensor restricted
- MAP sensor defective (A)
- MAP sensor defective (B)