Mitsubishi Eclipse 1990 Service Manual page 423

General scan tool
[Comment]
Background
The MAP sensor is mounted to intake manifold vacuum.
This information provides an important PCM input for determining fuel injector pulse wide.
The sensor should measure a difference in manifold pressure between key ON and after
the engine is running.
Range of Check
Vehicle is not moving
Engine: The engine idle speed is almost identical to the target idle speed while the engine
is idling.
Set Condition
Diagnostic trouble code (DTC) memory is not deleted even after the ignition switch is
turned off.
The difference between the two following MAP values is small.
The value immediately after the ignition switch is turned to ON.
The value while the
Measure at the MAP sensor connector
Disconnect the connector, and measure at the harness side.
Continuity between and ground.
OK: Continuitv
Check the following connectors:
Check trouble symptom.
Check the harness wire between the PCM and the MAP
connector.
Replace the MAP sensor.
ENGINE
No Change in MAP From Start to
is at idle for two seconds.
OK
NG
N G
OK
TSB Revision
Troubleshooting
Ice in sensor
Sensor failed
.
Check the
Check the harness wire between the PCM and the MAP sensor
connector. if
Repair
failed
.