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Home >> Mitsubishi Truck >> 2012 >> Outlander Sport AWD 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 24 >> Part 1

Part 1




DIAGNOSTIC ITEM 24: Short to power supply or ground in both CAN_H and CAN_L lines of the CAN-B bus lines.

CAUTION:
When servicing a CAN bus line, ground yourself by touching a metal object such as an unpainted water pipe. If you fail to do so, a component connected to the CAN bus line may be damaged.


























FUNCTION

If a short to power supply or ground is present in both CAN_H and CAN_L lines, this diagnosis result will be set.

TROUBLE JUDGMENT CONDITIONS

If a communication flag is set for the ETACS-ECU, no communication is present through the CAN-B line, and diagnostic trouble code U0019 is set, the ETACS-ECU determines that there is a failure.

TROUBLESHOOTING HINTS

- Malfunction of the connector (ETACS-ECU connector improperly connected)
- Malfunction of the wiring harness (CAN_H and CAN_L lines are short to power supply or ground on the CAN-B line.)
- Malfunction of ECUs

DIAGNOSIS

Required Special Tools:

- MB991223: Harness Set
- MB992006: Extra Fine Probe

STEP 1. Check the wiring harness between ETACS-ECU connector C-411 and body ground for a short to power supply. Measure the voltage at ETACS-ECU connector C-411.

CAUTION:
A digital multimeter should be used. For details refer to Harness Connector Inspection.

CAUTION:
The test wiring harness should be used. For details refer to Inspection Procedure 10.

(1)Disconnect ETACS-ECU connector C-411, and measure the voltage at the wiring harness side of ETACS-ECU connector.

(2)Turn the ignition switch to the ON position.





(3)Measure the voltage between ETACS-ECU connector terminal 6 and body ground.
OK: 4.7 volts or less





(4)Measure the voltage between ETACS-ECU connector terminal 7 and body ground.
OK: 4.7 volts or less
Q. Do all the voltages measure 4.7 volts or less?

YES Go to Step 2.

NO Go to Step 13.

STEP 2. Check the wiring harness between joint connector (CAN1) C-05 and combination meter connector C-203 for a short to ground. Measure the resistance at joint connector (CAN1) C-05.

(1)Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1).





(2)Measure the resistance between joint connector (CAN1) terminal 7 and body ground.
OK: 1 kohms or more





(3)Measure the resistance between joint connector (CAN1) terminal 18 and body ground.
OK: 1 kohms or more
Q. Do all the resistances measure 1 kohms or more?

YES (vehicles with KOS) : Go to Step 3.

YES (vehicles without KOS) : Go to Step 5.

NO (vehicles with KOS or WCM) : Go to Step 24.

STEP 3. Check the wiring harness between joint connector (CAN1) C-05 and KOS-ECU connector C-10 for a short to ground. Measure the resistance at joint connector (CAN1) C-05.

(1)Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1).





(2)Measure the resistance between joint connector (CAN1) terminal 9 and body ground.
OK: 1 kohms or more





(3)Measure the resistance between joint connector (CAN1) terminal 20 and body ground.
OK: 1 kohms or more
Q. Do all the resistances measure 1 kohms or more?

YES (vehicles with KOS) : Go to Step 4.

YES (vehicles without KOS) : Go to Step 5.

NO Go to Step 25.

STEP 4. Check the wiring harness between joint connector (CAN1) C-05 and OSS-ECU connector C-14 for a short to ground. Measure the resistance at joint connector (CAN1) C-05.

(1)Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1).





(2)Measure the resistance between joint connector (CAN1) terminal 5 and body ground.
OK: 1 kohms or more





(3)Measure the resistance between joint connector (CAN1) terminal 16 and body ground.
OK: 1 kohms or more
Q. Do all the resistances measure 1 kohms or more?

YES Go to Step 6.

NO Go to Step 26.

STEP 5. Check the wiring harness between joint connector (CAN1) C-05 and WCM connector C-09 for a short to ground. Measure the resistance at joint connector (CAN1) C-05.

(1)Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1).





(2)Measure the resistance between joint connector (CAN1) terminal 9 and body ground.
OK: 1 kohms or more





(3)Measure the resistance between joint connector (CAN1) terminal 20 and body ground.
OK: 1 kohms or more
Q. Do all the resistances measure 1 kohms or more?

YES Go to Step 6.

NO Go to Step 27.

STEP 6. Check the wiring harness between joint connector (CAN1) C-05 and SRS-ECU connector C-126 for a short to ground. Measure the resistance at joint connector (CAN1) C-05.

(1)Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1).





(2)Measure the resistance between joint connector (CAN1) terminal 10 and body ground.
OK: 1 kohms or more





(3)Measure the resistance between joint connector (CAN1) terminal 21 and body ground.
OK: 1 kohms or more
Q. Do all the resistances measure 1 kohms or more?

YES Go to Step 7.

NO Go to Step 28.

STEP 7. Check the wiring harness between joint connector (CAN1) C-05 and occupant classification-ECU connector D-48-2 for a short to ground. Measure the resistance at joint connector (CAN1) C-05.

(1)Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1).





(2)Measure the resistance between joint connector (CAN1) terminal 4 and body ground.
OK: 1 kohms or more





(3)Measure the resistance between joint connector (CAN1) terminal 15 and body ground.
OK: 1 kohms or more
Q. Do all the resistances measure 1 kohms or more?

YES Go to Step 8.

NO : Go to Step 29.

STEP 8. Check the wiring harness between joint connector (CAN1) C-05 and A/C-ECU connector C-210 for a short to ground. Measure the resistance at joint connector (CAN1) C-05.

(1)Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1).





(2)Measure the resistance between joint connector (CAN1) terminal 6 and body ground.
OK: 1 kohms or more





(3)Measure the resistance between joint connector (CAN1) terminal 17 and body ground.
OK: 1 kohms or more
Q. Do all the resistances measure 1 kohms or more?

YES (vehicles without MMCS) : Go to Step 9.

YES (vehicles with MMCS) : Go to Step 10.

NO Go to Step 30.

STEP 9. Check the wiring harness between joint connector (CAN1) C-05 and radio and CD player connector C-103 for a short to ground. Measure the resistance at joint connector (CAN1) C-05.

(1)Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1).





(2)Measure the resistance between joint connector (CAN1) terminal 8 and body ground.
OK: 1 kohms or more





(3)Measure the resistance between joint connector (CAN1) terminal 19 and body ground.
OK: 1 kohms or more
Q. Do all the resistances measure 1 kohms or more?

YES Go to Step 11.

NO : Go to Step 31.

STEP 10. Check the wiring harness between joint connector (CAN1) C-05 and CAN box unit connector C-119 for a short to ground. Measure the resistance at joint connector (CAN1) C-05.

(1)Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1).





(2)Measure the resistance between joint connector (CAN1) terminal 8 and body ground.
OK: 1 kohms or more





(3)Measure the resistance between joint connector (CAN1) terminal 19 and body ground.
OK: 1 kohms or more
Q. Do all the resistances measure 1 kohms or more?

YES Go to Step 11.

NO : Go to Step 32.

STEP 11. Check the wiring harness between joint connector (CAN1) C-05 and satellite radio tuner connector C-37 for a short to ground. Measure the resistance at joint connector (CAN1) C-05.

(1)Disconnect joint connector (CAN1), and measure the resistance at the wiring harness side of joint connector (CAN1).





(2)Measure the resistance between joint connector (CAN1) terminal 3 and body ground.
OK: 1 kohms or more





(3)Measure the resistance between joint connector (CAN1) terminal 14 and body ground.
OK: 1 kohms or more
Q. Do all the resistances measure 1 kohms or more?

YES Go to Step 12.

NO Go to Step 33.

STEP 12. Check the wiring harness between joint connector (CAN1) C-05 and ETACS-ECU connector C-411 for a short to ground. Measure the resistance at joint connector (CAN1) C-05.

(1)Disconnect joint connector (CAN1) and ETACS-ECU connector C-411, and measure the resistance at the wiring harness side of joint connector (CAN1).





(2)Measure the resistance between joint connector (CAN1) terminal 11 and body ground.
OK: 1 kohms or more





(3)Measure the resistance between joint connector (CAN1) terminal 22 and body ground.
OK: 1 kohms or more
Q. Do all the resistances measure 1 kohms or more?

YES Go to Step 34.

NO Repair the wiring harness between joint connector (CAN1) C-05 and ETACS-ECU connector C-411.

STEP 13. Check the wiring harness between joint connector (CAN1) C-05 and combination meter connector C-203 for a short to power supply. Measure the voltage at joint connector (CAN1) C-05.

CAUTION:
A digital multimeter should be used. For details refer to Harness Connector Inspection.

CAUTION:
The test wiring harness should be used. For details refer to Harness Connector Inspection.

(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 18 and body ground.
OK: 4.7 volts or less
Q. Do all the voltages measure 4.7 volts or less?

YES (vehicles with KOS) : Go to Step 14.

YES (vehicles with WCM) : Go to Step 16.

NO (vehicles with KOS and WCM) : Go to Step 24.

STEP 14. Check the wiring harness between joint connector (CAN1) C-05 and KOS-ECU connector C-10 for a short to power supply. Measure the voltage at joint connector (CAN1) C-05.

CAUTION:
A digital multimeter should be used. For details refer to Harness Connector Inspection.

CAUTION:
The test wiring harness should be used. For details refer to Harness Connector Inspection.

(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 20 and body ground.
OK: 4.7 volts or less
Q. Do all the voltages measure 4.7 volts or less?

YES (vehicles with KOS) : Go to Step 15.

YES (vehicles with WCM) : Go to Step 16.

NO Go to Step 25.

STEP 15. Check the wiring harness between joint connector (CAN1) C-05 and OSS-ECU connector C-14 for a short to power supply. Measure the voltage at joint connector (CAN1) C-05.

CAUTION:
A digital multimeter should be used. For details refer to How to Cope With Intermittent Malfunctions.

CAUTION:
The test wiring harness should be used. For details refer to Precautions When CAN Bus Line(S) Are Repaired.

(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 26.

STEP 16. Check the wiring harness between joint connector (CAN1) C-05 and WCM connector C-09 for a short to power supply. Measure the voltage at joint connector (CAN1) C-05.

CAUTION:
A digital multimeter should be used. For details refer to Precautions When CAN Bus Line(S) Are Repaired.

CAUTION:
The test wiring harness should be used. For details refer to Precautions When CAN Bus Line(S) Are Repaired.

(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 20 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 27.

STEP 17. Check the wiring harness between joint connector (CAN1) C-05 and SRS-ECU connector C-126 for a short to power supply. Measure the voltage at joint connector (CAN1) C-05.

CAUTION:
A digital multimeter should be used. For details refer to Precautions When CAN Bus Line(S) Are Repaired.

CAUTION:
The test wiring harness should be used. For details refer to Precautions When CAN Bus Line(S) Are Repaired.

(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 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 28.

STEP 18. Check the wiring harness between joint connector (CAN1) C-05 and occupant classification-ECU connector D-48-2 for a short to power supply. Measure the voltage at joint connector (CAN1) C-05.

CAUTION:
A digital multimeter should be used. For details refer to Precautions When CAN Bus Line(S) Are Repaired.

CAUTION:
The test wiring harness should be used. For details refer to Precautions When CAN Bus Line(S) Are Repaired.

(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 4 and body ground.
OK: 4.7 volts or less





(4)Measure the voltage between joint connector (CAN1) terminal 15 and body ground.
OK: 4.7 volts or less
Q. Do all the voltages measure 4.7 volts or less?

YES Go to Step 19.

NO : Go to Step 29.

STEP 19. Check the wiring harness between joint connector (CAN1) C-05 and A/C-ECU connector C-210 for a short to power supply. Measure the voltage at joint connector (CAN1) C-05.

CAUTION:
A digital multimeter should be used. For details refer to Precautions When CAN Bus Line(S) Are Repaired.

CAUTION:
The test wiring harness should be used. For details refer to Precautions When CAN Bus Line(S) Are Repaired.

(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 17 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 20.

YES (vehicles with MMCS) : Go to Step 21.

NO Go to Step 30.

STEP 20. Check the wiring harness between joint connector (CAN1) C-05 and radio and CD player connector C-103 for a short to power supply. Measure the voltage at joint connector (CAN1) C-05.

CAUTION:
A digital multimeter should be used. For details refer to Precautions When CAN Bus Line(S) Are Repaired.

CAUTION:
The test wiring harness should be used. For details refer to Precautions When CAN Bus Line(S) Are Repaired.

(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 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 22.

NO : Go to Step 31.

STEP 21. Check the wiring harness between joint connector (CAN1) C-05 and CAN box unit connector C-119 for a short to power supply. Measure the voltage at joint connector (CAN1) C-05.

CAUTION:
A digital multimeter should be used. For details refer to Precautions When CAN Bus Line(S) Are Repaired.

CAUTION:
The test wiring harness should be used. For details refer to Precautions When CAN Bus Line(S) Are Repaired.

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