P0105

Component Description
The absolute pressure sensor is connected to the MAP/BARO switch solenoid valve by a hose. The sensor detects ambient barometric pressure and intake manifold pressure and sends the voltage signal to the ECM. As the pressure increases, the voltage rises.

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". If the 1st trip DTC is not confirmed on "PROCEDURE FOR MALFUNCTION B", perform "PROCEDURE FOR MALFUNCTION C".

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

With CONSULT-II
1. Turn ignition switch ON.
2. Select "DATA MONITOR" mode with CONSULT-II.

3. Wait at least 6 seconds.
4. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

With GST
1. Turn ignition switch ON and wait at least 6 seconds.
2. Select "MODE 7" with GST.
3. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

No Tools
1. Turn ignition switch ON and wait at least 6 seconds.
2. Turn ignition switch OFF wait at least 5 seconds and then turn ON.
3. Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.
4. It 1st trip DTC is detected, go to "Diagnostic Procedure" below.

PROCEDURE FOR MALFUNCTION B

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 and select "DATA MONITOR" mode with CONSULT-II.

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

With GST
Follow the procedure "With CONSULT-II".

PROCEDURE FOR MALFUNCTION C

CAUTION: Always drive vehicle at a safe speed.

With CONSULT-II
1. Turn ignition switch ON.
2. Select "DATA MONITOR" mode with CONSULT-II and check "ABSOL PRES/SE" signal.
The voltage of "ABSOL PRES/SE" should be more than 1.74 [V].
If the check result is NG, go to "Diagnostic Procedure" below.
If the check result is OK, go to following step.

3. Start engine and warm it up to normal operating temperature.
4. Turn ignition switch OFF and wait at least 5 seconds.
5. Start engine and let it idle for at least 10 seconds.
6. Select "DATA MONITOR" mode with CONSULT-II.

7. Drive the vehicle at least 3 consecutive seconds under the following conditions,
8. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

Overall Function Check

PROCEDURE FOR MALFUNCTION C
Use this procedure to check the overall function of the front heated
oxygen sensor circuit. During this check, a 1st trip DTC might not
be confirmed.

With GST
1. Turn ignition switch ON.
2. Select absolute pressure sensor signal in "MODE 1" with GST.
3. Make sure that the pressure of absolute pressure sensor signal is more than 46 kPa (0.47 kg/sq.cm, 6.7 psi).
4. If NG, go to "Diagnostic Procedure" below.

No Tools
1. Turn ignition switch ON.

2. Make sure that the voltage between ECM terminal 45 (Absolute pressure sensor signal) and ground is more than 1.74 [V].
3. If NG, go to "Diagnostic Procedure" below.

EC-AP/SEN-01:

Wiring Diagram

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

PROCEDURE A