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Home >> Mitsubishi >> 2012 >> Lancer Sportback L4-2.0L (4B11) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Information Bus >> Testing and Inspection >> Component Tests and General Diagnostics >> Diagnostics Item 29 >> Part 2

Part 2




DIAGNOSTIC ITEM 29: Short to power supply or ground, open circuit or line-to-line short in the CAN-B bus lines. (Continued)

STEP 18. 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 8 and body ground.
OK: 4.7 V or less





(4)Measure the voltage between joint connector (CAN1) terminal 19 and body ground.
OK: 4.7 V or less
Q. Do all the voltages measure 4.7 V or less?

YES [vehicles without MMCS] : Go to Step 19.

YES [vehicles with MMCS] : Go to Step 20.

NO : Go to Step 49.

STEP 19. 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 6 and body ground.
OK: 4.7 V or less





(4)Measure the voltage between joint connector (CAN1) terminal 17 and body ground.
OK: 4.7 V or less
Q. Do all the voltages measure 4.7 V or less?

YES [vehicles without satellite radio] : Go to Step 22.

YES [vehicles with satellite radio] : Go to Step 21.

NO : Go to Step 50.

STEP 20. 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 6 and body ground.
OK: 4.7 V or less





(4)Measure the voltage between joint connector (CAN1) terminal 17 and body ground.
OK: 4.7 V or less
Q. Do all the voltages measure 4.7 V or less?

YES [vehicles without satellite radio] : Go to Step 22.

YES [vehicles with satellite radio] : Go to Step 21.

NO : Go to Step 51.

STEP 21. 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 3 and body ground.
OK: 4.7 V or less





(4)Measure the voltage between joint connector (CAN1) terminal 14 and body ground.
OK: 4.7 V or less
Q. Do all the voltages measure 4.7 V or less?

YES Go to Step 22.

NO Go to Step 52.

STEP 22. 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 11 and body ground.
OK: 4.7 V or less





(4)Measure the voltage between joint connector (CAN1) terminal 22 and body ground.
OK: 4.7 V or less
Q. Do all the voltages measure 4.7 V or less?

YES Go to Step 53.

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

STEP 23. Check the wiring harness for line-to-line short. Measure the resistance at ETACS-ECU connector C-301

CAUTION:
Disconnect the negative battery terminal. For details refer to Precautions When CAN Bus Line(s) are Repaired.

(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 34.

NO Go to Step 24.

STEP 24. 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 9 and 20.
OK: No continuity
Q. Is the check result normal?

YES [vehicles with KOS] : Go to Step 25.

YES [vehicles with WCM] : Go to Step 26.

NO [vehicles without KOS and WCM] : Go to Step 44.

STEP 25. 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 5 and 16.
OK: No continuity
Q. Is the check result normal?

YES Go to Step 27.

NO Go to Step 45.

STEP 26. 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 7 and 18.
OK: No continuity
Q. Is the check result normal?

YES Go to Step 27.

NO Go to Step 46.

STEP 27. 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 10 and 21.
OK: No continuity
Q. Is the check result normal?

YES Go to Step 28.

NO Go to Step 47.

STEP 28. Check the wiring harness between joint connector (CAN1) C-06 and occupant classification-ECU connector D-35-2 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 4 and 15.
OK: No continuity
Q. Is the check result normal?

YES Go to Step 29.

NO : Go to Step 48.

STEP 29. 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 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 19.
OK: No continuity
Q. Is the check result normal?

YES [vehicles without MMCS] : Go to Step 30.

YES [vehicles with MMCS] : Go to Step 31.

NO : Go to Step 49.

STEP 30. Check the wiring harness between joint connector (CAN1) C-06 and radio and CD player or CD changer connector C-104 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 6 and 17.
OK: No continuity
Q. Is the check result normal?

YES [vehicles without satellite radio] : Go to Step 33.

YES [vehicles with satellite radio] : Go to Step 32.

NO : Go to Step 50.

STEP 31. Check the wiring harness between joint connector (CAN1) C-06 and CAN box unit connector C-108 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 6 and 17.
OK: No continuity
Q. Is the check result normal?

YES [vehicles without satellite radio] : Go to Step 33.

YES [vehicles with satellite radio] : Go to Step 32.

NO : Go to Step 51.

STEP 32. Check the wiring harness between joint connector (CAN1) C-06 and satellite radio tuner connector C-17 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 Go to Step 33.

NO Go to Step 52.

STEP 33. Check the wiring harness between joint connector (CAN1) C-06 and ETACS-ECU connector C-301 for line-to-line short. Measure the resistance at joint connector (CAN1) C-06.

(1)Disconnect joint connector (CAN1) and ETACS-ECU connector C-301, 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 11 and 22.
OK: No continuity
Q. Is the check result normal?

YES Go to Step 53.

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

STEP 34. Check the wiring harness between joint connector (CAN1) C-06 and combination meter connector C-04 for open circuit.

CAUTION:
Strictly observe the specified wiring harness repair procedure.
For details refer to Precautions When CAN Bus Line(s) are Repaired.

(1)Disconnect joint connector (CAN1) C-06 and combination meter connector C-301, and check the wiring harness.





(2)Check the wiring harness between joint connector (CAN1) C-06 (terminal 9) and combination meter connector C-04 (terminal 14)
OK: Continuity exists (2 ohms or less)





(3)Check the wiring harness between joint connector (CAN1) C-06 (terminal 20) and combination meter connector C-04 (terminal 15)
OK: Continuity exists (2 ohms or less)
Q. Is the wiring harness between joint connector (CAN1) C-06 and combination meter connector C-04 in good condition?

YES [vehicles with KOS] : Go to Step 35.

YES [vehicles with WCM] : Go to Step 36.

NO [vehicles without KOS and WCM] : Go to Step 44.

STEP 35. Check the wiring harness between joint connector (CAN1) C-06 and KOS-ECU connector C-31 for open circuit.

(1)Disconnect joint connector (CAN1) C-06 and KOS-ECU connector C-31, and check the wiring harness.





(2)Check the wiring harness between joint connector (CAN1) C-06 (terminal 5) and KOS-ECU connector C-31 (terminal 1)
OK: Continuity exists (2 ohms or less)





(3)Check the wiring harness between joint connector (CAN1) C-06 (terminal 16) and KOS-ECU connector C-31 (terminal 2)
OK: Continuity exists (2 ohms or less)
Q. Is the wiring harness between joint connector (CAN1) C-06 and KOS-ECU connector C-31 in good condition?

YES Go to Step 37.

NO Go to Step 45.

STEP 36. Check the wiring harness between joint connector (CAN1) C-06 and WCM connector C-09 for open circuit.

(1)Disconnect joint connector (CAN1) C-06 and WCM connector C-09, and check the wiring harness.





(2)Check the wiring harness between joint connector (CAN1) C-06 (terminal 7) and WCM connector C-09 (terminal 11)
OK: Continuity exists (2 ohms or less)





(3)Check the wiring harness between joint connector (CAN1) C-06 (terminal 18) and WCM connector C-09 (terminal 10)
OK: Continuity exists (2 ohms or less)
Q. Is the wiring harness between joint connector (CAN1) C-06 and WCM connector C-09 in good condition?

YES Go to Step 37.

NO Go to Step 46.

STEP 37. Check the wiring harness between joint connector (CAN1) C-06 and SRS-ECU connector C-122 for open circuit.

(1)Disconnect joint connector (CAN1) C-06 and SRS-ECU connector C-122, and check the wiring harness.





(2)Check the wiring harness between joint connector (CAN1) C-06 (terminal 10) and SRS-ECU connector C-122 (terminal 15)
OK: Continuity exists (2 ohms or less)





(3)Check the wiring harness between joint connector (CAN1) C-06 (terminal 21) and SRS-ECU connector C-122 (terminal 16)
OK: Continuity exists (2 ohms or less)
Q. Is the wiring harness between joint connector (CAN1) C-06 and SRS-ECU connector C-122 in good condition?

YES Go to Step 38.

NO Go to Step 47.
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