Code 0803

COMPONENT DESCRIPTION
The absolute pressure sensor is connected to the MAP/BARO switch solenoid valve with a duct. The sensor detects ambient barometric pressure and intake manifold pressure respectively, and modifies the voltage signal received from the ECM. The modified signal will then be returned to the ECM. As the pressure increases, the voltage rises. The absolute pressure sensor is not directly used to control the engine system. it is used only for on board diagnosis's.





CONSULT REFERENCE VALUE IN DATA MONITOR MODE
- Specification data are reference values.





ECM TERMINALS AND REFERENCE VALUE

Remarks: Specification data are reference values. and are measured between each terminal and (25) (ECCS around) with a voltmeter.





ON BOARD DIAGNOSIS LOGIC

DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE
Perform "Procedure for malfunction A" first. If the DTC cannot be confirmed, perform "OVERALL FUNCTION CHECK", "Procedure for malfunction B". If there is no problem on "Procedure for malfunction B", perform "Procedure for malfunction C".

Procedure for malfunction A

With Consult
(1) Turn ignition switch "ON".
(2) Select "DATA MONITOR" mode with CONSULT
(3) Wait at least 6 seconds.

OR

With Generic Scan tool
(1) Turn ignition switch "ON" and wait at least 6 seconds.
(2) Select "MODE 7" with GST.

OR

Without Scan Tool
(1) Turn ignition switch "ON" and wait at least 6 seconds.
(2) Turn ignition switch "OFF" and wait at least 5 seconds.
(3) Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.

Procedure for malfunction C

With Consult
(1) Start engine and warm it up sufficiently.
(2) Turn ignition switch "OFF" and wait at least 5 seconds.
(3) Turn ignition switch "ON" and select "DATA MONITOR" mode with CONSULT.
(4) Start engine and let it idle.
(5) Wait at least 15 seconds.

OR

With Generic Scan Tool
(1) Start engine and warm it up sufficiently.
(2) Turn ignition switch "OFF" and wait at least 5 seconds.
(3) Start engine.
(4) Let engine idle and wait at least 15 seconds.
(5) Select "MODE 7" with GST.

OR

Without Scan Tool
(1) Start engine and warm it up sufficiently.
(2) Turn ignition switch "OFF" and wait at least 5 seconds.
(3) Start engine.
(4) Let engine idle and wait at least 15 seconds.
(5) Turn ignition switch "OFF".
(6) Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.











OVERALL FUNCTION CHECK
This procedure can be used for checking the overall function of absolute pressure sensor circuit. During this check, a DTC might not be confirmed.

Procedure for malfunction B

With Consult
(1) Turn ignition switch "ON".
(2) Select "ABSOL PRES/SE" in "DATA MONITOR" mode with CONSULT.
(3) Make sure that the voltage of "ABSOL PRES/SE" is more than 1.74 [V].

OR

With Generic Scan Tool
(1) Turn ignition switch "ON".
(2) Select "MAP" in "MODE 1" with GST.
(3) Make sure that the pressure of "MAP" is more than 46 kPa (0.47 kg/sq.cm, 6.7 psi).

OR

Without Scan Tool
(1) Turn ignition switch "ON".
(2) Make sure that the voltage between ECM terminal and ground is more than 1.74 [V].

DIAGNOSTIC PROCEDURE
If the trouble is duplicated after "Procedure for malfunction A or B", perform "Procedure A". If the trouble is duplicated after "Procedure for malfunction C", perform "Procedure B".

EC-AP/SEN-01 Absolute Pressure Sensor (DTC: P105):

Absolute Pressure Sensor (DTC: P105):

Procedure A





Procedure B




















COMPONENT INSPECTION

With Consult
1. Start engine and warm it up sufficiently.
2. Perform "MAP/BARO SW/V" in "ACTIVE TEST" mode with CONSULT.
3. Make sure of the following.
- When selecting "MAP", "ABSOL PRES/SE" indicates approximately 1.3V.
- When selecting "BARO", "ABSOL PRES/SE" indicates approximately 4.3V.
4. If NG, check "Absolute pressure sensor" below.

OR

Without Consult
1. Remove MAP/BARO switch solenoid valve.
2. Check air passage continuity.
3. If NG, check "Absolute pressure sensor" below.

Absolute pressure sensor
1. Remove absolute pressure sensor from bracket with its harness connector connected.
2. Remove hose from absolute pressure sensor.
3. Apply vacuum and pressure to absolute pressure sensor as shown in figure.
4. Check output voltage between terminal (2) and engine ground.
5. If NO, replace absolute pressure sensor.
If OK, check MAP/BARO switch solenoid valve. Refer to "COMPONENT INSPECTION".