Engine (Diagnostics) (H4DOTC): Other Subaru Baja I

LIST

LIST OF DIAGNOSTIC TROUBLE CODES (DTCS)

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CHECK LIST NO. 1

Check the following items when problem has occurred.

Note. Use copies of this page for interviewing customers.

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CHECK LIST NO. 2

Check the following items about the vehicle's state when malfunction indicator light turns on.

Note. Use copies of this page for interviewing customers.

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1. Airbag system wiring harness is routed near the ECM, main relay and fuel pump relay. CAUTION: All airbag system wiring harness and connectors are colored yellow. Do not use the electrical test equipment on these circuit. Be careful not to damage the airbag system wiring harness when servicing the ECM, TCM, main relay and fuel pump relay.
2. Never connect the battery in reverse polarity. The ECM will be destroyed instantly. The fuel injector and other part will be damaged in just a few minutes more.
3. Do not disconnect the battery cables while the engine is running. A large counter electromotive force will be generated in the alternator, and this voltage may damage electronic parts such as ECM, etc.
4. Before disconnecting the connectors of each sensor and the ECM, be sure to turn the ignition switch to OFF.
5. Poor contact has been identified as a primary cause of this problem. To measure the voltage and/or resistance of individual sensors or all electrical control modules at the harness side connector, use a tapered pin with a diameter of less than 0.64 mm (0.025 in). Do not insert the pin more than 5 mm (0.20 in) into the part.
6. Before removing the ECM from located position, disconnect two cables on battery. Otherwise, the ECM may be damaged. CAUTION: When replacing the ECM, be careful not to use the wrong spec. ECM to avoid any damage on the fuel injection system.
7. The connectors to each sensor in the engine compartment and the harness connectors on the engine side and body side are all designed to be waterproof. However, it is still necessary to take care not to allow water to get into the connectors when washing the vehicle, or when servicing the vehicle on a rainy day.
8. Use the ECM mounting stud bolt at the body head grounding points when measuring voltage and resistance inside the passenger compartment.
9. Use the engine grounding terminal or engine proper as the grounding point to the body, when measuring voltage and resistance in the engine compartment.
10. Every MFI-related part is a precision part. Do not drop them.
11. Observe the following cautions when installing a radio in MFI equipped models. CAUTION: The antenna must be kept as far apart as possible from the control unit. (The ECM is located under the steering column, inside of the instrument panel lower trim panel.) The antenna feeder must be placed as far as possible from ECM and MFI harness. Carefully adjust the antenna for correct matching. When mounting a large power type radio, pay special attention to the three items above mentioned. Incorrect installation of the radio may affect the operation of ECM.
12. Before disconnecting the fuel hose, disconnect the fuel pump connector and crank the engine for more than 5 seconds to release pressure in the fuel system. If the engine starts during this operation, run it until it stops.
13. Diagnostics should be conducted by rotating with simple, easy operations and proceeding to complicated, difficult operations. The most important thing in diagnostics is to understand the customer's complaint, and distinguish between the three causes.
14. On model with ABS, when performing driving test in jacked-up or lifted-up position, sometimes the warning light may be lit, but this is not a malfunction of the system. The reason for this is the speed difference between front and rear wheels. After diagnosis of engine control system, perform the ABS memory clearance procedure of self-diagnosis system.

BATTERY

1. Measure the battery voltage and specific gravity of electrolyte. Standard voltage: 12 V Specific gravity: Above 1.260
2. Check the condition of main and other fuses, and harnesses and connectors. Also check for proper grounding.

ENGINE GROUNDING

Make sure the engine grounding terminal is properly connected to engine.

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ENGINE AND EMISSION CONTROL SYSTEM

1. The Multipoint Fuel Injection (MFI) system is a system that supplies the optimum air-fuel mixture to the engine for all the various operating conditions through the use of the latest electronic technology. With this system fuel, which is pressurized at a constant pressure, is injected into the intake air passage of the cylinder head. The injection quantity of fuel is controlled by an intermittent injection system where the electro-magnetic injection valve (fuel injector) opens only for a short period of time, de- pending on the quantity of air required for one cycle of operation. In actual operation, the injection quantity is determined by the duration of an electric pulse applied to the fuel injector and this permits simple, yet highly precise metering of the fuel.
2. Further, all the operating conditions of the engine are converted into electric signals, and this results in additional features of the system, such as large improved adaptability, easier addition of compensating element, etc.

The MFI system also has the following features

1. Reduced emission of harmful exhaust gases.
2. Reduced in fuel consumption.
3. Increased engine output.
4. Superior acceleration and deceleration.
5. Superior startability and warm-up performance in cold weather since compensation is made for coolant and intake air temperature.

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1. Module
2. Sensor
3. Solenoid Valve, Actuator, Emission Control System Parts and Ignition System Parts

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1. MODULE
2. SENSOR
3. SOLENOID VALVE AND SWITCH (AT MODEL)
4. SOLENOID VALVE AND SWITCH (MT MODEL)

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Measuring condition

1. After warm-up the engine.
2. Gear position is in neutral position.
3. A/C is turned to OFF.
4. All accessory switches are turned to OFF.

NOTE

This connector is used both for the OBD-II general scan tools and Subaru Select Monitor.

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1. Prepare a general scan tool (OBD-II general scan tool) required by SAE J1978.
2. Open the cover and connect the OBD-II general scan tool to data link connector (A) located in the lower portion of instrument panel (on the driver's side).
3. Using the OBD-II general scan tool, call up DTC and freeze frame data. OBD-II general scan tool functions consist of: MODE $01: Current powertrain diagnostic data MODE $02: Powertrain freeze frame data MODE $03: Emission-related powertrain DTC MODE $04: Clear/Reset emission-related diagnostic information MODE $06: Request on-board monitoring test results for non-continuously monitored systems MODE $07: Request on-board monitoring test results for continuously monitored systems MODE $09: Request vehicle information

Read out the data according to repair procedures. (For detailed operation procedures, refer to the OBD-II General Scan Tool Operation Manual).

Note. For details concerning DTC, refer to the LIST OF DIAGNOSTIC TROUBLE CODE (DTC) .

MODE $02 (POWERTRAIN FREEZE FRAME DATA)

Refers to data denoting the operating condition when trouble is sensed by the on-board diagnosis system A list of the support data and PID (Parameter Identification) codes are shown in the following table.

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Note. Refer to .

MODE $06

Refer to . List of support data is shown in the following table.

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MODE $07

Refer to .

MODE $09

Refer to .

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1. Prepare the Subaru Select Monitor kit. Refer to «PREPARATION TOOL»(ref-208380-S25856979922005120700000) , General Description.
2. Connect the diagnosis cable to Subaru Select Monitor.
3. Insert the cartridge into Subaru Select Monitor. Refer to «PREPARATION TOOL»(ref-208380-S25856979922005120700000) , General Description.
4. Connect the Subaru Select Monitor to data link connector. Data link connector is located in the lower portion of instrument panel (on the driver's side). Connect the diagnosis cable to data link connector. CAUTION: Do not connect the scan tools except for Subaru Select Monitor and OBD-II general scan tool.
5. Turn the ignition switch to ON (engine OFF) and Subaru Select Monitor switch to ON.
6. Using the Subaru Select Monitor, call up the DTC and various data, and then record them.

READ CURRENT DATA FOR ENGINE (NORMAL MODE)

1. On the << Main Menu >> display screen, select the {Each System Check} and press the [YES] key.
2. On the << System Selection Menu >> display screen, select the {Engine Control System} and press the [YES] key.
3. Press the [YES] key after the information of engine type is displayed.
4. On the << Engine Diagnosis >> display screen, select the {Current Data Display & Save} and press the [YES] key.
5. On the << Data Display Menu >> display screen, select the {Data Display} and press the [YES] key.
6. Using the scroll key, move the display screen up or down until desired data is shown.

1. A list of the support data is shown in the following table.

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Note. For detailed operation procedure, refer to the Subaru Select Monitor Operation Manual.

READ CURRENT DATA FOR ENGINE (OBD MODE)

1. On the << Main Menu >> display screen, select the {Each System Check} and press the [YES] key.
2. On the << System Selection Menu >> display screen, select the {Engine Control System} and press the [YES] key.
3. Press the [YES] key after the information of engine type is displayed.
4. On the << Engine Diagnosis >> display screen, select the {OBD System} and press the [YES] key.
5. On the << OBD Menu >> display screen, select the {Current Data Display & Save} and press the [YES] key.
6. On the << Data Display Menu >> display screen, select the {Data Display} and press the [YES] key.
7. Using the scroll key, move the display screen up or down until desired data is shown.

1. A list of the support data is shown in the following table.

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Note. For detailed operation procedure, refer to the Subaru Select Monitor Operation Manual.

READ FREEZE FRAME DATA FOR ENGINE. (OBD MODE)

1. On the << Main Menu >> display screen, select the {Each System Check} and press the [YES] key.
2. On the << System Selection Menu >> display screen, select the {Engine Control System} and press the [YES] key.
3. Press the [YES] key after the information of engine type is displayed.
4. On the << Engine Diagnosis >> display screen, select the {OBD System} and press the [YES] key.
5. On the << OBD Menu >> display screen, select the {Freeze Frame Data} and press the [YES] key.

1. A list of the support data is shown in the following table.

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Note. For detailed operation procedure, refer to the Subaru Select Monitor Operation Manual.

SUBARU SELECT MONITOR (NORMAL MODE)

1. On the << Main Menu >> display screen, select the {Each System Check} and press the [YES] key.
2. On the << System Selection Menu >> display screen, select the {Engine Control System} and press the [YES] key.
3. Press the [YES] key after the information of engine type is displayed.
4. On the << Engine Diagnosis >> display screen, select the {DTC Display} and press the [YES] key.
5. On the << DTC Display >> display screen, select the {Current DTC} or {History DTC} and press the [YES] key.

Note. For detailed operation procedure, refer to the Subaru Select Monitor Operation Manual. For detailed concerning DTC, refer to the LIST OF DIAGNOSTIC TROUBLE CODE (DTC) .

SUBARU SELECT MONITOR (OBD MODE)

1. On the << Main Menu >> display screen, select the {2. Each System Check} and press the [YES] key.
2. On the << System Selection Menu >> display screen, select the {Engine Control System} and press the [YES] key.
3. Press the [YES] key after the information of engine type is displayed.
4. On the << Engine Diagnosis >> display screen, select the {OBD System} and press the [YES] key.
5. On the << OBD Menu >> display screen, select the {DTC Display} and press the [YES] key.
6. Make sure that a DTC is shown on the display screen.

Note. For detailed operation procedure, refer to the Subaru Select Monitor Operation Manual. For detailed concerning DTC, refer to the LIST OF DIAGNOSTIC TROUBLE CODE (DTC) .

PREPARATION FOR THE DRIVE CYCLE

1. Make sure that the fuel remains approx. half amount [20 - 40 l (5.3 - 10.6 US gal, 4.4 - 8.8 Imperial gal)], and battery voltage is 12 V or more.
2. Separate the test mode connector.

Note. Except for the engine coolant temperature specified items at starting, the diagnosis is carried out after engine warm up. Carry out the diagnosis which is marked * on DTC twice, then, after finishing first diagnosis, stop the engine and do second time at the same condition.

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IDLE FOR 10 MINUTES

Note. Before the diagnosis, drive the vehicle at 10 km/h (6 MPH) or more.

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1. On the << Main Menu >> display screen, select the {2. Each System Check} and press the [YES] key.
2. On the << System Selection Menu >> display screen, select the {Engine Control System} and press the [YES] key.
3. Press the [YES] key after the information of engine type is displayed.
4. On the << Engine Diagnosis >> display screen, select the {Clear Memory} and press the [YES] key.
5. When the `Done' and `Turn Ignition Switch OFF' are shown on the display screen, turn the ignition switch to OFF, and then turn the Subaru Select Monitor to OFF.

Note. For detailed operation procedure, refer to the Subaru Select Monitor Operation Manual.

1. On the << Main Menu >> display screen, select the {2. Each System Check} and press the [YES] key.
2. On the << System Selection Menu >> display screen, select the {Engine Control System} and press the [YES] key.
3. Press the [YES] key after the information of engine type is displayed.
4. On the << Engine Diagnosis >> display screen, select the {OBD System} and press the [YES] key.
5. On the << OBD Menu >> display screen, select the {4. Diagnosis Code(s) Cleared} and press the [YES] key.
6. When the `Clear Diagnostic Code?' is shown on the display screen, press the [YES] key.
7. Turn the ignition switch to OFF, and then turn the Subaru Select Monitor to OFF.

Note. For detailed operation procedure, refer to the Subaru Select Monitor Operation Manual.

STARTER MOTOR CIRCUIT

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1. WIRING DIAGRAM

CONTROL MODULE POWER SUPPLY AND GROUND LINE

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1. WIRING DIAGRAM

IGNITION CONTROL SYSTEM

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1. WIRING DIAGRAM

FUEL PUMP CIRCUIT

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1. WIRING DIAGRAM

FUEL INJECTOR CIRCUIT

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1. WIRING DIAGRAM