FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM: Car repair manuals for everyone.
Home >> Mitsubishi >> 2010 >> Lancer L4-2.0L (4B11) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Information Bus >> Testing and Inspection >> Component Tests and General Diagnostics >> CAN Bus Diagnostics >> Diagnostic Item 28 >> Part 2

Part 2

STEP 15. Check the wiring harness between joint connector (CAN1) C-06 and KOS-ECU connector C-31 for a short to power supply. Measure the voltage at joint connector (CAN1) C-06.







1. Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1).
2. Turn the ignition switch to the ON position.
3. Measure the voltage between joint connector (CAN1) terminal 9 and body ground.

OK: 4.7 volts or less







4. Measure the voltage between joint connector (CAN1) terminal 22 and body ground.

OK: 4.7 volts or less

Q: Do all the voltages measure 4.7 volts or less?

YES: Go to Step 17.

NO: Go to Step 49.

STEP 16. Check the wiring harness between joint connector (CAN1) C-06 and WCM connector C-09 for a short to power supply. Measure the voltage at joint connector (CAN1) C-06.







1. Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1).
2. Turn the ignition switch to the ON position.
3. Measure the voltage between joint connector (CAN1) terminal 5 and body ground.

OK: 4.7 volts or less







4. Measure the voltage between joint connector (CAN1) terminal 16 and body ground.

OK: 4.7 volts or less

Q: Do all the voltages measure 4.7 volts or less?

YES: Go to Step 17.

NO: Go to Step 50.

STEP 17. Check the wiring harness between joint connector (CAN1) C-06 and SRS-ECU connector C-122 for a short to power supply. Measure the voltage at joint connector (CAN1) C-06.







1. Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1).
2. Turn the ignition switch to the ON position.
3. Measure the voltage between joint connector (CAN1) terminal 8 and body ground.

OK: 4.7 volts or less







4. Measure the voltage between joint connector (CAN1) terminal 21 and body ground.

OK: 4.7 volts or less

Q: Do all the voltages measure 4.7 volts or less?

YES: Go to Step 18.

NO: Go to Step 51.

STEP 18. Check the wiring harness between joint connector (CAN1) C-06 and occupant classification-ECU connector D-35-2 for a short to power supply. Measure the voltage at joint connector (CAN1) C-06.







1. Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1).
2. Turn the ignition switch to the ON position.
3. Measure the voltage between joint connector (CAN1) terminal 11 and body ground.

OK: 4.7 volts or less







4. Measure the voltage between joint connector (CAN1) terminal 24 and body ground.

OK: 4.7 volts or less

Q: Do all the voltages measure 4.7 volts or less?

YES (vehicles without hands free system): Go to Step 20.
YES (vehicles with hands free system): Go to Step 19.

NO: Go to Step 52.

STEP 19. Check the wiring harness between joint connector (CAN1) C-06 and hands free module connector C-110 for a short to power supply. Measure the voltage at joint connector (CAN1) C-06.







1. Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1).
2. Turn the ignition switch to the ON position.
3. Measure the voltage between joint connector (CAN1) terminal 10 and body ground.

OK: 4.7 volts or less







4. Measure the voltage between joint connector (CAN1) terminal 23 and body ground.

OK: 4.7 volts or less

Q: Do all the voltages measure 4.7 volts or less?

YES: Go to Step 20.

NO: Go to Step 53.

STEP 20. Check the wiring harness between joint connector (CAN1) C-06 and A/C-ECU connector C-20 [vehicles with A/C] or heater control unit connector C-48 [vehicles without A/C] for a short to power supply. Measure the voltage at joint connector (CAN1) C-06.







1. Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1).
2. Turn the ignition switch to the ON position.
3. Measure the voltage between joint connector (CAN1) terminal 1 and body ground.

OK: 4.7 volts or less







4. Measure the voltage between joint connector (CAN1) terminal 12 and body ground.

OK: 4.7 volts or less

Q: Do all the voltages measure 4.7 volts or less?

YES (vehicles without MMCS): Go to Step 21.
YES (vehicles with MMCS): Go to Step 22.

NO: Go to Step 54.

STEP 21. Check the wiring harness between joint connector (CAN1) C-06 and radio and CD player or CD changer connector C-104 for a short to power supply. Measure the voltage at joint connector (CAN1) C-06.







1. Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1).
2. Turn the ignition switch to the ON position.
3. Measure the voltage between joint connector (CAN1) terminal 7 and body ground.

OK: 4.7 volts or less







4. Measure the voltage between joint connector (CAN1) terminal 20 and body ground.

OK: 4.7 volts or less

Q: Do all the voltages measure 4.7 volts or less?

YES (vehicles without satellite radio): Go to Step 24.
YES (vehicles with satellite radio): Go to Step 23.

NO: Go to Step 55.

STEP 22. Check the wiring harness between joint connector (CAN1) C-06 and CAN box unit connector C-108 for a short to power supply. Measure the voltage at joint connector (CAN1) C-06.







1. Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1).
2. Turn the ignition switch to the ON position.
3. Measure the voltage between joint connector (CAN1) terminal 7 and body ground.

OK: 4.7 volts or less







4. Measure the voltage between joint connector (CAN1) terminal 20 and body ground.

OK: 4.7 volts or less

Q: Do all the voltages measure 4.7 volts or less?

YES (vehicles without satellite radio): Go to Step 24.
YES (vehicles with satellite radio): Go to Step 23.

NO: Go to Step 56.

STEP 23. Check the wiring harness between joint connector (CAN1) C-06 and satellite radio tuner connector C-17 for a short to power supply. Measure the voltage at joint connector (CAN1) C-06.







1. Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1).
2. Turn the ignition switch to the ON position.
3. Measure the voltage between joint connector (CAN1) terminal 2 and body ground.

OK: 4.7 volts or less







4. Measure the voltage between joint connector (CAN1) terminal 13 and body ground.

OK: 4.7 volts or less

Q: Do all the voltages measure 4.7 volts or less?

YES: Go to Step 24.

NO: Go to Step 57.

STEP 24. Check the wiring harness between joint connector (CAN1) C-06 and ETACS-ECU connector C-301 for a short to power supply. Measure the voltage at joint connector (CAN1) C-06.







1. Disconnect joint connector (CAN1), and measure the voltage at the wiring harness side of joint connector (CAN1).
2. Turn the ignition switch to the ON position.
3. Measure the voltage between joint connector (CAN1) terminal 6 and body ground.

OK: 4.7 volts or less







4. Measure the voltage between joint connector (CAN1) terminal 19 and body ground.

OK: 4.7 volts or less

Q: Do all the voltages measure 4.7 volts or less?

YES: Go to Step 58.

NO: Repair the wiring harness between joint connector (CAN1) C-06 and ETACS-ECU connector C-301.

STEP 25. Check the wiring harness for line-to-line short. Measure the resistance at ETACS-ECU connector C-301

CAUTION: Disconnect the negative battery terminal.







1. Disconnect ETACS-ECU connector C-301, and check that there is continuity at the harness side of ETACS-ECU.
2. Check that there is continuity between ETACS-ECU connector terminals 6 and 7.

OK: No continuity

Q: Is the check result normal?

YES: Go to Step 37.

NO: Go to Step 26.

STEP 26. Check the wiring harness between joint connector (CAN1) C-06 and combination meter connector C-04 for line-to-line short. Measure the resistance at joint connector (CAN1) C-06.







1. Disconnect joint connector (CAN1), and check that there is continuity at the harness side of joint connector (CAN1).
2. Check that there is continuity between joint connector (CAN1) terminals 3 and 14.

OK: No continuity

Q: Is the check result normal?

YES (vehicles with KOS): Go to Step 27.
YES (vehicles with WCM): Go to Step 28.

NO (vehicles with KOS or WCM): Go to Step 48.

STEP 27. Check the wiring harness between joint connector (CAN1) C-06 and KOS-ECU connector C-31 for line-to-line short. Measure the resistance at joint connector (CAN1) C-06.







1. Disconnect joint connector (CAN1), and check that there is continuity at the harness side of joint connector (CAN1).
2. Check that there is continuity between joint connector (CAN1) terminals 9 and 22.

OK: No continuity

Q: Is the check result normal?

YES: Go to Step 29.

NO: Go to Step 49.

STEP 28. Check the wiring harness between joint connector (CAN1) C-06 and WCM connector C-09 for line-to-line short. Measure the resistance at joint connector (CAN1) C-06.







1. Disconnect joint connector (CAN1), and check that there is continuity at the harness side of joint connector (CAN1).
2. Check that there is continuity between joint connector (CAN1) terminals 5 and 16.

OK: No continuity

Q: Is the check result normal?

YES: Go to Step 29.

NO: Go to Step 50.

STEP 29. Check the wiring harness between joint connector (CAN1) C-06 and SRS-ECU connector C-122 for line-to-line short. Measure the resistance at joint connector (CAN1) C-06.







1. Disconnect joint connector (CAN1), and check that there is continuity at the harness side of joint connector (CAN1).
2. Check that there is continuity between joint connector (CAN1) terminals 8 and 21.

OK: No continuity

Q: Is the check result normal?

YES: Go to Step 30.

NO: Go to Step 51.
pro multis Credits:Operation CHARM About Operation CHARM