Engine (Diagnostics) (H4SO): Overview Subaru Baja I

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DESCRIPTION

1. The on-board diagnostics (OBD) system detects and indicates a fault in various inputs and outputs of the complex electronic control. CHECK ENGINE malfunction indicator lamp (MIL) in the combination meter indicates occurrence of a fault or trouble.
2. Further, against such a failure or sensors as may disable the drive, the fail-safe function is provided to ensure the minimal driveability.
3. The OBD system incorporated with the vehicles within this engine family complies with Section 1968.1, California Code of Regulations (OBD-II regulation). The OBD system monitors the components and the system malfunction listed in Engine Section which affects on emissions.
4. When the system decides that a malfunction occurs, MIL illuminates. At the same time of the MIL illumination or blinking, a diagnostic trouble code (DTC) and a freeze frame engine conditions are stored into on-board computer.
5. The OBD system stores freeze frame engine condition data (engine load, engine coolant temperature, fuel trim, engine speed and vehicle speed, etc.) into on-board computer when it detects a malfunction first.
6. If the OBD system detects the various malfunction including the fault of fuel trim or misfire, the OBD system first stores freeze frame engine conditions about the fuel trim or misfire.
7. When the malfunction does not occur again for three consecutive driving cycles, MIL is turned off, but DTC remains at on-board computer.
8. The OBD-II system is capable of communication with a general scan tool (OBD-II general scan tool) formed by ISO 9141 CARB.
9. The OBD-II diagnostics procedure is different from the usual diagnostics procedure. When troubleshooting OBD-II vehicles, connect Subaru Select Monitor or the OBD-II general scan tool to the vehicle.

OPERATION

Carry out trouble diagnosis shown in the following DTC table.

When performing trouble diagnosis which is not shown in the DTC table, refer to the next item drive cycle. Refer to DRIVE CYCLE .

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1. Make sure that fuel remains approx. half amount [20 to 40 l (5.3 - 10.6 US gal, 4.4 - 8.8 lmp gal)], and battery voltage is 12V or more.
2. Raise the vehicle using a garage jack and place on safety stands or drive the vehicle onto free rollers. WARNING: Before raising the vehicle, ensure parking brakes are applied. Do not use a pantograph jack in place of a safety stand. Secure a rope or wire to the front and rear towing or tie-down hook to prevent the lateral runout of front wheels. Do not abruptly depress/release clutch pedal or accelerator pedal during works even when engine is operating at low speeds since this may cause vehicle to jump off free rollers. In order to prevent the vehicle from slipping due to vibration, do not place any wooden blocks or similar items between the safety stands and the vehicle. Since the rear wheels will also rotate, do not place anything near them. Also, make sure that nobody goes in front of the vehicle.

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1. After performing diagnostics and clearing the memory, check for any remaining unresolved trouble data. Refer to «CLEAR MEMORY MODE»(ref-208365-S09915749072005120700000) .
2. Warm up engine.
3. Prepare Subaru Select Monitor kit. Refer to «PREPARATION TOOL»(ref-208365-S21859467282005120700000) .
4. Connect diagnosis cable to Subaru Select Monitor.
5. Insert cartridge into Subaru Select Monitor kit. Refer to «PREPARATION TOOL»(ref-208365-S21859467282005120700000) .
6. Connect test mode connector (A) at the lower portion of instrument panel (on the driver's side), to the side of the center console box.
7. Connect Subaru Select Monitor to data link connector. Connect Subaru Select Monitor to data link connector (A) located in the lower portion of the instrument panel (on the driver's side). Connect diagnosis cable to data link connector. CAUTION: Do not connect scan tools except for Subaru Select Monitor and OBD-II general scan tool.
8. Turn ignition switch to ON (engine OFF) and Subaru Select Monitor switch to ON.
9. On the << Main Menu >> display screen, select the {2. Each System Check} and press the [YES] key.
10. On the << System Selection Menu >> display screen, select the {Engine Control System} and press the [YES] key.
11. Press the [YES] key after displayed the information of engine type.
12. On the << Engine Diagnosis >> display screen, select the {Dealer Check Mode Procedure} and press the [YES] key.
13. When the "Perform Inspection (Dealer Check) Mode?" is shown on the display screen, press the [YES] key.
14. Perform subsequent procedures as instructed on the display screen. If trouble still remains in the memory, the corresponding diagnostic trouble code (DTC) appears on the display screen. NOTE: For detailed operation procedure, refer to the Subaru Select Monitor Operation Manual. For detailed concerning diagnostic trouble codes, refer to the List of Diagnostic Trouble Code (DTC). Refer to «LIST OF DIAGNOSTIC TROUBLE CODE (DTC)»(ref-208365-S37793840062005120700000) Release the parking brake. The speed difference between front and rear wheels may light either the ABS warning light, but this indicates no malfunctions. When engine control diagnosis is finished, perform the ABS memory clearance procedure of self-diagnosis system.

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1. After performing diagnostics and clearing the memory, check for any remaining unresolved trouble data: Refer to «CLEAR MEMORY MODE»(ref-208365-S09915749072005120700000) .
2. Warm up engine.
3. Connect test mode connector (A) at the lower side of the instrument panel (on the driver's side), to the side of the center console box.
4. Connect the OBD-II general scan tool to its data link connector (A) in the lower portion of the instrument panel (on the driver's side). CAUTION: Do not connect the scan tools except for Subaru Select Monitor and OBD-II general scan tool.
5. Start the engine. NOTE: Ensure the selector lever is placed in the "P" position before starting. (AT vehicles) Depress clutch pedal when starting the engine. (MT vehicles)
6. Using the selector lever or shift lever, turn the "P" position switch and the "N" position switch to ON.
7. Depress the brake pedal to turn the brake switch ON. (AT vehicles)
8. Keep engine speed in the 2,500 - 3,000 rpm range for 40 seconds.
9. Place the selector lever or shift lever in the "D" position (AT vehicles) or "1st" gear (MT vehicles) and drive the vehicle at 5 to 10 km/h (3 to 6 MPH). NOTE: On AWD vehicles, release the parking brake. The speed difference between front and rear wheels may light the ABS warning light, but this indicates no malfunctions. When engine control diagnosis is finished, perform the ABS memory clearance procedure of self-diagnosis system.
10. Using the OBD-II general scan tool, check for diagnostic trouble code(s) and record the result(s). NOTE: For detailed operation procedures, refer to the OBD-II General Scan Tool Instruction Manual. For detailed concerning diagnostic trouble codes, refer to the «LIST OF DIAGNOSTIC TROUBLE CODE (DTC)»(ref-208365-S37793840062005120700000) . Refer to «LIST OF DIAGNOSTIC TROUBLE CODE (DTC)»(ref-208365-S37793840062005120700000) .

There are 3 drive patterns for trouble diagnosis. Driving in the specified pattern allows to diagnose the malfunctioning items listed below. After the malfunctioning items listed below are repaired, always check whether they correctly resume their functions by driving in the required drive pattern.