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CAN BUS DIAGNOSTICS TABLE Mitsubishi Eclipse IV

Controller Area Network (CAN): Diagnosis 13 illustrations ~521 words

CAN BUS DIAGNOSTICS TABLE

This diagnosis applies only to the CAN bus lines. If a different system is defective, proceed to the applicable diagnosis section for each system. Observe the diagnosis procedure below only when the CAN bus line is defective.

CAUTIONDuring diagnosis, a DTC code associated with another system may be set when the ignition switch is turned on with connector(s) disconnected. After completing the repair, confirm all systems for DTC code(s). If DTC code(s) are set, erase them all.

CAN BUS DIAGNOSTICS SCAN TOOL SCREEN DIAGNOSIS DETAIL < Comment > Short circuit to battery in red displayed area is estimated. DIAGNOSTIC ITEM 1 Diagnose shorts in the power supply to CAN bus line < Comment > Grounding in red displayed area is estimated. DIAGNOSTIC ITEM 2 Diagnose shorts in the ground to CAN bus line < Comment > Short circuit between CAN_H and CAN_L in red displayed area is estimated. DIAGNOSTIC ITEM 3 Diagnose shorts between CAN_H and L lines < Comment > Disconnection in red displayed area is estimated. < Comment > Disconnection or terminating resistance in red displayed area is estimated. DIAGNOSTIC ITEM 4 Diagnose the terminator resistors < Comment > Harness disconnection or loose connection in red displayed area is estimated. DIAGNOSTIC ITEM 5 Diagnose when the scan tool cannot receive the data sent by combination meter. < Comment > Harness disconnection or loose connection in red displayed area is estimated. DIAGNOSTIC ITEM 6 Diagnose when the scan tool cannot receive the data sent by ETACS-ECU. < Comment > Harness disconnection or loose connection in red displayed area is estimated. DIAGNOSTIC ITEM 7 Diagnose when the scan tool cannot receive the data sent by A/C-ECU. < Comment > Harness disconnection or loose connection in red displayed area is estimated. DIAGNOSTIC ITEM 8 Diagnose when the scan tool cannot receive the data sent by SRS-ECU. < Comment > Harness disconnection or loose connection in red displayed area is estimated. DIAGNOSTIC ITEM 9 Diagnose when the scan tool cannot receive the data sent by the ECM < M/T > or the PCM < A/T >. < Comment > Harness disconnection or loose connection in red displayed area is estimated. DIAGNOSTIC ITEM 10 Diagnose when the scan tool cannot receive the data sent by ABS-ECU < vehicles without traction control system > or ABS/TCL-ECU < vehicles with traction control system >. < Comment > Harness disconnection or loose connection in red displayed area is estimated. DIAGNOSTIC ITEM 11 Diagnose when the scan tool cannot receive the data sent by the ECM < M/T > or the PCM < A/T > and ABS-ECU < vehicles without traction control system > or ABS/TCL-ECU < vehicles with traction control system >. < Comment > Malfunction in red displayed area is estimated. Please refer to service manual and inspect with 'CAN Detail Diagnosis'. DIAGNOSTIC ITEM 12 Diagnose CAN bus lines thoroughly

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Note. If the screen other than above is displayed, troubles are present at two or more spots. In this case, diagnose CAN bus lines by referring to the trouble spot pinpoint procedures.

Note. If a trouble cannot be solved after performing the diagnosis other than item 4, diagnose CAN bus line thoroughly.