Mitsubishi Motors Service Manual

2018 / ECLIPSE CROSS / EC - Workshop Manual

13 -FUEL > 13A-DIRECT INJECTION AND MULTIPOINT FUEL INJECTION (DI AND MPI) > TROUBLESHOOTING > SYMPTOM PROCEDURES > STARTING IMPOSSIBLE (STARTER NOT OPERATIVE)

Inspection Procedure 16: Starting Impossible (starter not operative)

OPERATION

The battery voltage is supplied to the starter relay and starter terminal from the battery.
The ignition switch-ST signal is inputted into the engine-ECU connector terminal ST from the ignition switch connector terminal ST <vehicles without KOS> or KOS&OSS-ECU connector terminal STO <vehicles with KOS>.
The engine-ECU connector terminal STHI and STLO turn ON the power transistor in the unit, and then makes the current flow into the starter relay to turn ON the relay.
When the starter relay is turned ON, the current flows into the starter from the starter relay to drive the starter motor.

COMMENTS ON TROUBLE SYMPTOM

The failure could possibly be caused by the malfunction of the starter or starter system circuits. If the engine-ECU or the KOS&OSS-ECU sets the diagnosis code, the engine start should be restricted.

PROBABLE CAUSES

Failed battery
Failed clutch interlock switch <M/T>
Failed inhibitor switch <CVT>
Failed brake monitoring switch <CVT>
Failed ignition switch <vehicles without KOS>
Failed KOS&OSS-ECU <vehicles with KOS>
Failed starter relay
Failed starter motor
Open/short circuit or harness damage in ignition switch-ST circuit, or loose connector contact
Open/short circuit or harness damage in starter relay circuit, or loose connector contact
Failed ETACS-ECU
Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check battery

Check battery (Refer to GROUP 54A - Battery - On-vehicle Service - Battery Test

Is the check result normal?

Go to Step 3 <Vehicles without KOS>.

Go to Step 2 <Vehicles with KOS>.

Replace the battery.

STEP 2. M.U.T.-IIISE other system diagnosis code

Confirm whether the diagnosis code is set in the KOS&OSS-ECU.

Is the diagnosis code set?

Perform the troubleshooting of the KOS&OSS-ECU (Refer to GROUP 42B - Troubleshooting - Inspection Chart for Diagnosis Code

Go to Step 3.

STEP 3. M.U.T.-IIISE diagnosis code

Confirm whether the diagnosis code is set in the engine-ECU.

Is the diagnosis code set?

Inspection chart for diagnosis code (Refer to

Go to Step 4 <M/T>.

Go to Step 5 <CVT>.

STEP 4. M.U.T.-IIISE data list

Item 187: Clutch interlock switch (bottom)

OK:

ON (Clutch pedal: Fully depressed)
OFF (Clutch pedal: Released)

Is the check result normal?

Go to Step 12.

Perform the troubleshooting of diagnosis code No. P0833: Clutch interlock switch circuit (Refer to

STEP 5. M.U.T.-IIISE data list

Item 87: Neutral position switch

OK:

ON (Selector lever: P or N)
OFF (Selector lever: Other than P and N)

Is the check result normal?

Go to Step 11.

Go to Step 6.

STEP 6. Check the inhibitor switch.

Check the inhibitor switch (Refer to GROUP 23A - On- Vehicle Service - Essential Service - Inhibitor Switch Continuity Check

Does the trouble symptom persist?

Go to Step 7.

Replace the inhibitor switch.

STEP 7. Perform voltage measurement at inhibitor switch connector.

Disconnect connector, and measure at harness side.
Ignition switch: ON
Voltage between terminal engine control relay side power supply line and body earth.

OK: System voltage

Is the check result normal?

Go to Step 8.

Repair the connector(s), or check and repair of short to earth, and open circuit in power supply line between engine control relay connector and inhibitor switch connector.

STEP 8. Check of damage in power supply line between engine control relay connector and inhibitor switch connector.

Is the check result normal?

Go to Step 9.

Repair the connector(s) or wiring harness.

STEP 9. Check of short to power supply, short to earth, open circuit, and harness damage in IHB line between inhibitor switch connector and engine-ECU connector.

Is the check result normal?

Go to Step 10.

Repair the connector(s) or wiring harness.

STEP 10. Check the trouble symptom.

Does the trouble symptom persist?

Replace the engine-ECU.

Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions

STEP 11. M.U.T.-IIISE data list

Item 89: Normally closed brake switch

OK:

ON (Brake pedal: Depressed)
OFF (Brake pedal: Released)

Is the check result normal?

Go to Step 12.

Check Inspection Procedure - brake monitoring switch system (Refer to

STEP 12. M.U.T.-IIISE data list

Item 79: Cranking signal (Ignition switch-ST)

OK:

ON (Ignition switch: ST)
OFF (Ignition switch: ON)

Is the check result normal?

Go to Step 18.

Go to Step 13.

STEP 13. Perform voltage measurement at ETACS-ECU connector by back probing.

Do not disconnect connector.
Clutch pedal: Fully depressed <M/T>
Selector lever: P or N <CVT>
Brake pedal: Depressed <CVT>
Ignition switch: ST
Voltage between terminal ST1 and body earth.

OK: System voltage

Is the check result normal?

Go to Step 16.

Go to Step 14 <Vehicles without KOS>.

Go to Step 15 <Vehicles with KOS>.

STEP 14. Check ignition switch itself.

Check ignition switch itself (Refer to GROUP 54A - Ignition Switch - Inspection - Ignition Switch Check

Is the check result normal?

Repair the connector(s), or check and repair of short to power supply, short to earth, open circuit, and harness damage in ST1 line between ignition switch connector and ETACS-ECU connector.

Replace the ignition switch.

STEP 15. Check of short to power supply, short to earth, open circuit, and harness damage in ST1 line between KOS&OSS-ECU connector and ETACS-ECU connector.

Is the check result normal?

Perform the troubleshooting of the KOS&OSS-ECU (Refer to GROUP 42B - Troubleshooting - Symptom Chart

Repair the connector(s) or wiring harness.

STEP 16. Continuity check on ETACS-ECU connectors.

Disconnect connectors, and check at ETACS-ECU side.
Continuity check between terminal ST1 and ST2.

OK: Continuity

Is the check result normal?

Go to Step 17.

Replace the ETACS-ECU.

STEP 17. Check of short to power supply, short to earth, open circuit, and harness damage in ST2 line between ETACS-ECU connector and engine-ECU connector.

Is the check result normal?

Go to Step 10.

Repair the connector(s) or wiring harness.

STEP 18. Check the starter relay itself.

Check the starter relay itself (Refer to GROUP 16 - Starting System - On-vehicle Service - Starter Relay Continuity Check

Is the check result normal?

Go to Step 19.

Replace the starter relay.

STEP 19. Check of short to power supply, short to earth, open circuit, and harness damage in power supply line between battery and starter relay connector.

Is the check result normal?

Go to Step 20.

Repair the connector(s) or wiring harness.

STEP 20. Check of short to earth in output line between starter relay connector and starter connector.

Is the check result normal?

Go to Step 21.

Repair the connector(s) or wiring harness.

STEP 21. Check of short to earth, open circuit and harness damage in power supply line between battery and starter.

Is the check result normal?

Go to Step 22.

Repair the terminal(s) or wiring harness.

STEP 22. Check starter motor operation.

Check starter motor operation (Refer to GROUP 16 - Starting System - Starter Motor Assembly - Starter Motor Assembly Inspection ).

Is the check result normal?

Go to Step 10.

Replace the starter motor.