Mitsubishi Outlander manuals

Mitsubishi Outlander: General Information, Service Precautions

General Information

CAN, an abbreviation for Controller Area Network, is an ISO-certified international standard for a serial multiplex communication protocol*. A communication circuit employing the CAN protocol connects each electric control module (ECU), and sensor data can be shared among, which enables more reduction in wiring.

NOTE: *: The regulations have been decided in detail, from software matters such as the necessary transmission rate for communication, the system, data format, and communication timing control method to hardware matters such as the harness type and length and the resistance values.

CAN offers the following advantages.

STRUCTURE

Mitsubishi Outlander. Controller Area Network (CAN)

Special Tools

Mitsubishi Outlander. Controller Area Network (CAN)

Mitsubishi Outlander. Controller Area Network (CAN)

Test Equipment

Mitsubishi Outlander. Controller Area Network (CAN)

Service Precautions

Mitsubishi Outlander. Controller Area Network (CAN)

Mitsubishi Outlander. Controller Area Network (CAN)

Precautions On How To Repair The Can Bus Lines

PRECAUTIONS ON HOW TO REPAIR THE CAN BUS LINES

Mitsubishi Outlander. Controller Area Network (CAN)

Mitsubishi Outlander. Controller Area Network (CAN)

Mitsubishi Outlander. Controller Area Network (CAN)

PRECAUTIONS ON HOW TO REPAIR THE TERMINATOR RESISTOR

If one-side terminator resistor is broken, the CAN communication will continue although noise suppression is deteriorated. No diagnostic trouble code may be set even if the terminator resistor was broken. If a damage is found, replace the ECU which incorporates the defective terminator resistor.

CAN BUS LINE REPAIR HARNESS (PART NAME AND NUMBER)

Mitsubishi Outlander. Controller Area Network (CAN)

EXPLANATION ABOUT THE SCAN TOOL (M.U.T.-III) CAN BUS DIAGNOSTICS

Scan tool MB991958 CAN bus diagnostics carries out the two checks below automatically, and then displays current condition of the CAN bus lines according to the check results.

CAN BUS LINE DIAGNOSTIC FLOW

Mitsubishi Outlander. Controller Area Network (CAN)

1. Scan tool CAN bus diagnostics

Scan tool MB991958 diagnoses CAN bus lines in accordance with the following strategy.

NOTE: After you determine whether the CAN-C lines are in good condition, then determine whether the CAN-B lines are in good condition.

Then confirm each judgment result on the scan tool screen.

  1. Check that the ETACS-ECU sets a diagnostic trouble code.

    You can narrow down the points to be diagnosed by confirming an ETACS-ECU diagnostic trouble code.

  2. Checking the communication condition of ECUs.

    Scan tool MB991958 narrows down troubles in circuit by itself. Its strategies are as follows.

Reference circuit

Mitsubishi Outlander. Controller Area Network (CAN)

Mitsubishi Outlander. Controller Area Network (CAN)

Mitsubishi Outlander. Controller Area Network (CAN)

2. Pinpoint possible trouble spot according to diagnostic trouble code.

If diagnostic trouble code related to CAN communication is set as past trouble, isolate opens as described below.

NOTE: If you pinpoint trouble spot according to diagnostic trouble code, you should use time-out diagnostic trouble code. Diagnostic trouble code related to failure information is set when the data to be set contains an error, so CAN bus line itself is probably normal.

NOTE: Time-out diagnostic trouble codes are stored in each ECU memory individually. Therefore, it is possible that these diagnostic trouble codes have not been set simultaneously. If the trouble spot cannot be found when you diagnose by judging from multiple diagnostic trouble codes, check the communication lines between each ECU.

Mitsubishi Outlander. Controller Area Network (CAN)

Mitsubishi Outlander. Controller Area Network (CAN)

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