FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM: Car repair manuals for everyone.
Home >> Mitsubishi >> 2009 >> Eclipse L4-2.4L (4G69) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Information Bus >> Testing and Inspection >> Component Tests and General Diagnostics >> CAN Bus Diagnostics >> Diagnostic Item 2 >> Part 2

Part 2

STEP 14. Check the CAN line of the front wiring harness for a short to the power supply. Measure the resistance at intermediate connector C-26.







1. Disconnect intermediate connector C-26, and measure the resistance at the male side (at floor wiring harness side).
2. Turn the ignition switch to the "ON" position.







3. Measure the resistance between intermediate connector terminal 15 (CAN_H) and body ground.

OK: 1 kohms or more







4. Measure the resistance between intermediate connector terminal 16 (CAN_L) and body ground.

OK: 1 kohms or more

Q: Is the check result normal?

YES : Go to Step 17.

NO : Go to Step 15.

STEP 15. Check the CAN line between intermediate connector C-26 and convertible top control module connector D-45 for a short to ground. Measure the resistance at intermediate connector C-26.

CAUTION: Disconnect the negative battery terminal.

1. Disconnect the negative battery terminal.







2. Disconnect intermediate connector C-26 and convertible top control module connector D-45, and measure the resistance at the male side of intermediate connector C-26 (at floor wiring harness side).







3. Measure the resistance between intermediate connector terminal 15 (CAN_H) and body ground.

OK: 1 kohms or more







4. Measure the resistance between intermediate connector terminal 16 (CAN_L) and body ground.

OK: 1 kohms or more

CAUTION: Strictly observe the specified wiring harness repair procedure.

Q: Is the check result normal?

YES : Go to Step 16.

NO : Repair the wiring harness.

STEP 16. Check the CAN line between intermediate connector C-23 and convertible top control module connector D-45 for a short to ground. Measure the resistance at intermediate connector C-23.

CAUTION: Disconnect the negative battery terminal.

1. Disconnect the negative battery terminal.







2. Disconnect intermediate connector C-23 and convertible top control module connector D-45, and measure the resistance at the male side of intermediate connector C-23 (at floor wiring harness side).







3. Measure the resistance between intermediate connector terminal 22 (CAN_H) and body ground.

OK: 1 kohms or more







4. Measure the resistance between intermediate connector terminal 23 (CAN_L) and body ground.

OK: 1 kohms or more

CAUTION: Strictly observe the specified wiring harness repair procedure.

Q: Is the check result normal?

YES : Check the convertible top control module connector D-45, and repair if necessary. If the convertible top control module connector D-45 is in good condition, replace the convertible top control module.

NO : Repair the wiring harness.

STEP 17. Check the CAN line between the ECM [M/T] or PCM [A/T] connector B-18 and ABS-ECU connector A-02 [vehicles without TCL or ASC] or ABS/TCL-ECU connector A-03 [vehicles with TCL] or TCL/ASC-ECU connector A-38 [vehicles with ASC] for a short to ground. Measure the resistance at ECM [M/T] or PCM [A/T] connector B-18.

CAUTION: Disconnect the negative battery terminal.

1. Disconnect the negative battery terminal.













2. Disconnect ECM [M/T] or PCM [A/T] connector B-18 and ABS-ECU connector A-02 [vehicles without TCL or ASC] or ABS/TCL-ECU connector A-03 [vehicles with TCL] or TCL/ASC-ECU connector A-38 [vehicles with ASC], and measure the resistance at the harness side of ECM [M/T] or PCM [A/T] connector B-18.







3. Measure the resistance between ECM [M/T] or PCM [A/T] connector terminal 17 and body ground.

OK: 1 kohms or more







4. Measure the resistance between ECM [M/T] or PCM [A/T] connector terminal 18 and body ground.

OK: 1 kohms or more

CAUTION: Strictly observe the specified wiring harness repair procedure.

Q: Is the check result normal?

YES : Go to Step 18.

NO : Repair the wiring harness between ECM [M/T] or PCM [A/T] connector and ABS-ECU [vehicles without TCL or ASC] or ABS/TCL-ECU [vehicles with TCL] connector or TCL/ASC-ECU [vehicles with ASC] connector.

STEP 18. Retest the system.

CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.







1. Connect scan tool MB991958 to the data link connector.
2. Diagnose CAN bus lines, and check if scan tool MB991958 screen shows normal state.

Q: Is the check result normal?

YES : Intermittent malfunction.

NO : Check the ABS-ECU [vehicles without TCL or ASC] or ABS/TCL-ECU [vehicles with TCL] connector or TCL/ASC-ECU [vehicles with ASC] connector, and repair if necessary. If the ABS-ECU [vehicles without TCL or ASC] or ABS/TCL-ECU [vehicles with TCL] connector or TCL/ASC-ECU [vehicles with ASC] connector is in good condition, replace the ABS-ECU [vehicles without TCL or ASC] or ABS/TCL-ECU [vehicles with TCL] or TCL/ASC-ECU [vehicles with ASC].

STEP 19. Check the combination meter for a short to ground.







1. Disconnect combination meter connector C-04.

CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.







2. Connect scan tool MB991958 to the data link connector.







3. Diagnose CAN bus lines, and check if scan tool MB991958 screen is as shown in the illustration.

Q: Does scan tool MB991958 screen correspond to the illustration?

YES : Go to Step 20.

NO : Go to Step 21.

STEP 20. Check the ECM [M/T] or PCM [A/T] for a short to ground.







1. Disconnect ECM [M/T] or PCM [A/T] connector B-18.

CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.







2. Connect scan tool MB991958 to the data link connector.







3. Diagnose CAN bus lines, and check if scan tool MB991958 screen is as shown in the illustration.

Q: Does scan tool MB991958 screen correspond to the illustration?

YES : Return to Step 1.

NO : Go to Step 22.

STEP 21. Retest the system.

CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.







1. Connect scan tool MB991958 to the data link connector.
2. Diagnose CAN bus lines, and check if scan tool MB991958 screen shows normal state.

Q: Is the check result normal?

YES : Intermittent malfunction.

NO : Check the combination meter connector, and repair if necessary. If the combination meter connector is in good condition, replace the combination meter.

STEP 22. Retest the system.

CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.







1. Connect scan tool MB991958 to the data link connector.
2. Diagnose CAN bus lines, and check if scan tool MB991958 screen shows normal state.

Q: Is the check result normal?

YES : Intermittent malfunction.

NO : Check the ECM [M/T] or PCM [A/T] connector, and repair if necessary. If the ECM [M/T] or PCM [A/T] connector is in good condition, replace the ECM [M/T] or PCM [A/T]. When the ECM [M/T] or PCM [A/T] is replaced, register the encrypted code.
pro multis Credits:Operation CHARM About Operation CHARM