Diagnosis Procedure
- CHECK ATMOSPHERIC PRESSURE SENSOR POWER SUPPLY-1
- Turn ignition switch OFF.
- Disconnect atmospheric pressure sensor harness connector.
- Turn ignition switch ON.
- Check the voltage between atmospheric pressure sensor harness connectors.
Atmospheric pressure sensor
Voltage
Connector
+
-
Terminal
E25
1
3
Approx. 5V
Is the inspection result normal?
YES
GO TO 6 .
NO
GO TO 2 .
- CHECK ATMOSPHERIC PRESSURE SENSOR POWER SUPPLY-2
Check the voltage between atmospheric pressure sensor harness connector and ground.
+
Ground
Voltage
Atmospheric pressure sensor
Connector
Terminal
E25
1
Ground
Approx. 5V
Is the inspection result normal?
YES
GO TO 4 .
NO
GO TO 3 .
- CHECK SENSOR POWER SUPPLY 2 CIRCUIT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check harness connector for short to power and short to ground, between the following terminals.
ECM
Sensor
Connector
Terminal
Name
Connector
Terminal
E16
107
Atmospheric pressure sensor
E25
1
EVAP control system pressure sensor
C4
3
Is the inspection result normal?
YES
Perform the trouble diagnosis for power supply circuit. Refer to DTC Diagnosis Procedure .
NO
Repair or replace error-detected parts.
- CHECK ATMOSPHERIC PRESSURE SENSOR GROUND CIRCUIT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between atmospheric pressure sensor harness connector and ECM harness connector.
+
-
Continuity
Atmospheric pressure sensor
ECM
Connector
Terminal
Connector
Terminal
E25
3
E16
112
Existed
Is the inspection result normal?
YES
GO TO 5 .
NO
Repair or replace error-detected parts.
- CHECK ECM GROUND CIRCUIT
Check the voltage between ECM harness connector and ground.
ECM
Ground
Continuity
Connector
Terminal
E16
123
Ground
Existed
124
127
128
Is the inspection result normal?
YES
Check intermittent incident. Refer to Intermittent Incident .
NO
Repair or replace error-detected parts.
- CHECK ATMOSPHERIC PRESSURE SENSOR SIGNAL CIRCUIT
- Check the continuity between atmospheric pressure sensor harness connector and ECM harness connector.
+
-
Atmospheric pressure sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E25
2
E16
105
Existed
- Also check harness for short to ground and to power.
Is the inspection result normal?
YES
GO TO 7 .
NO
Repair or replace error-detected parts.
- Check the continuity between atmospheric pressure sensor harness connector and ECM harness connector.
- CHECK ATMOSPHERIC PRESSURE SENSOR
Refer to Component Inspection .
Is the inspection result normal?
YES
INSPECTION END
NO
Replace atmospheric pressure sensor. Refer to Component Parts Location .