TEST
ACTION
APPLICABILITY
8
Turn the ignition off.
Disconnect the MAP Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance of the (F855) 5-Volt Supply circuit in the MAP Sensor harness
connector to ground.
Is the resistance below 100 ohms?
All
Yes
→ Repair the short to ground in the (F855) 5-volt Supply circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→ Go To 9
9
Turn the ignition off.
Disconnect the MAP Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance of the (F855) 5-volt Supply circuit between the MAP Sensor
harness connector and the PCM harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 10
No
→ Repair the open in the (F855) 5-volt Supply circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
10
NOTE: Before continuing, check the PCM harness connector terminals for
corrosion, damage, or terminal push out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay
particular attention to all Power and Ground circuits.
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
159
DRIVEABILITY - SBEC
P1297-NO CHANGE IN MAP FROM START TO RUN —
Continued