P1105

SYSTEM DESCRIPTION
This system allows the absolute pressure sensor to monitor either ambient barometric pressure or intake manifold pressure The MAP/BARO switch solenoid valve switches between two passages by ON-OFF pulse signals from the ECM. (One passage is from the intake air duct, the other is from the intake manifold.) Either ambient barometric pressure or intake manifold pressure is applied to the absolute pressure sensor.




COMPONENT DESCRIPTION
The MAP/BARO switch solenoid valve switches its air flow passage according to the voltage signal sent from the ECM. When voltage is supplied from the ECM, the MAP/BARO switch solenoid turns "ON". Then, the absolute pressure sensor can monitor the ambient barometric pressure. When voltage is not supplied from the ECM, the MAP/BARO switch solenoid valve turns "OFF". Then, the sensor monitors intake manifold pressure.




CONSULT-II Reference Value in Data Monitor Mode
Specification data are reference values.




ECM Terminals and Reference Value
Specification data are reference value and are measured between each terminal and 43 (ECM group).

On Board Diagnosis Logic:

DTC Confirmation Procedure
Perform "Procedure for malfunction A" first. If the 1st trip DTC cannot be confirmed, perform "Procedure for malfunction B".

NOTE: If "DTC Confirmation Procedure" has been previously conducted, always turn ignition switch OFF and wait at least 5 seconds before conducting the next test.

PROCEDURE FOR MALFUNCTION A

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11 V at ignition switch "ON".

With CONSULT-II
1. Turn ignition switch ON and select "DATA MONITOR" mode with CONSULT-II.




2. Wait at least 10 seconds.
3. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

With GST
Follow the procedure "With CONSULT-II"

PROCEDURE FOR MALFUNCTION B

TESTING CONDITION: Always perform at a temperature above 5 °C (41 °F).

With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 5 seconds.
3. Turn ignition switch ON again and select "DATA MONITOR" mode with CONSULT-II.
4. Make sure that TANK/F/TEMP SE" is more than 0 °C (32 °F).




5. Start engine and let it idle for at least 10 seconds.
6. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

With GST
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 5 seconds.
3. Turn ignition switch ON.




4. Check that voltage between ECM terminal 60 and ground is less than 4.2 V.
5. Start engine and let it idle for at least 10 seconds.
6. Select "MODE 7" with GST.
7. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

No Tools
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 5 seconds.
3. Turn ignition switch ON.
4. Check that voltage between ECM terminal 60 and ground is less than 4.2 V.
5. Start engine and let it idle for at least 10 seconds.
6. Turn ignition switch OFF, wait at least 5 seconds and then turn ignition ON.
7. Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.
8. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

EC-SW/V-01:

Wiring Diagram

Main Harness And Room Harness Connector Views:

Diagnostic Procedure
If the trouble is duplicated after "PROCEDURE FOR MALFUNCTION A", perform "PROCEDURE A" below. If the trouble is duplicated after "PROCEDURE FOR MALFUNCTION B", perform "PROCEDURE B" .

PROCEDURE A

Step 1 - 2:

Step 3 - 4:

Step 5:

Step 6 - 7:

PROCEDURE B

Step 1:

Step 2 - 3:

Step 4 - 5:

Step 6 - 8:

Step 9 -10:

Step 11 - 12:

Step 13 - 14:

Step 15 - 16: