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Home >> Mitsubishi >> 2011 >> Endeavor AWD V6-3.8L (6G75) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Information Bus >> Testing and Inspection >> Component Tests and General Diagnostics >> Diagnostics Item 13
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Diagnostics Item 13




DIAGNOSTIC ITEM 13: Diagnose the lines between CAN main bus line and the ETACS-ECU

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.














TROUBLE JUDGMENT

If the M.U.T.-III cannot received signals from ETACS-ECU, CAN bus line connector(s) are broken or an open circuit has occurred.

COMMENTS ON TROUBLE SYMPTOM

The wiring harness wire or connectors may have loose, corroded, or damage terminals, or terminals pushed back in the connector, or the ETACS-ECU may be defective.

TROUBLESHOOTING HINTS

- The wiring harness or connectors may have loose, corroded, or damage terminals, or terminals pushed back in the connector
- The ETACS-ECU may be defective

DIAGNOSIS

Required Special Tools:

- MB991223: Harness Set
- MB992006: Extra Fine Probe

STEP 1. Check joint connector (4) C-101 and ETACS-ECU connector C-218 for loose, corroded or damaged terminals, or terminals pushed back in the connector.









NOTE:
For the removal of the joint connector, refer to Service and Repair.

CAUTION:
The strand end of the twist wire should be within 10 cm (4 inches) from the connector. For details refer to Precautions When CAN Bus Line(s) are Repaired.





Check the joint connector at the wiring harness side for loose, corroded or damaged terminals, or terminals pushed back in the connector, and also check the short pin behind the connector for corrosion, deformation and delamination.

Q. Are joint connector (4) C-101 and ETACS-ECU connector C-218 in good condition?

YES Go to Step 2 .

NO Repair the damaged parts. Replace the joint connector as necessary.

STEP 2. Check the CAN bus lines between joint connector (4) and the ETACS-ECU. Measure the resistance between joint connector (4) C-101 and ETACS-ECU connector C-218.

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 (4) C-101 and ETACS-ECU connector C-218, and measure the resistances at the wiring harness sides of joint connector (4) C-101 and ETACS-ECU connector C-218.
(2)Turn the ignition switch to the "LOCK" (OFF) position.
(3)
CAUTION:
Disconnect the negative battery terminal. For details refer to Precautions When CAN Bus Line(s) are Repaired.

Disconnect the negative battery terminal.





(4)Measure the resistance between joint connector (4) terminal 6 and ETACS-ECU connector terminal 73.
OK: 2 ohms or less





(5)Measure the resistance between joint connector (4) terminal 17 and ETACS-ECU connector terminal 72.
OK: 2 ohms or less
CAUTION:
Strictly observe the specified wiring harness repair procedure.
For details refer to Precautions on How to Repair the CAN Bus Line(s).

Q. Do all the resistances measure 2 ohms or less?

YES [All the resistances measure 2 ohms or less] Power supply to the ETACS-ECU may be suspected. Diagnose the SWS. Inspection Procedure A-3.

NO [If either of the resistances measures more than 2 ohms or all the resistances measure more than 2 ohms] Repair the wiring harness between joint connector (4) and the ETACS-ECU connector.

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