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Home >> Mitsubishi >> 2004 >> Eclipse V6-3.0L SOHC >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Information Bus >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> Symptom Diagnostic Procedures >> A - Charts >> Inspection Procedure A-5

Inspection Procedure A-5

Communication with the Sunroof Motor Assembly (Sunroof-ECU) is Impossible.

Sunroof Motor Assembly (Sunroof-ECU) Power Supply And SWS Communication Circuit Part 1:




Sunroof Motor Assembly (Sunroof-ECU) Power Supply And SWS Communication Circuit Part 2:






CIRCUIT OPERATION
- Power to the sunroof motor assembly is supplied through battery and fusible link (5).
- When the ignition switch (IG2) signal is on, the sunroof motor assembly is ready to operate.

TECHNICAL DESCRIPTION (COMMENT)
The power supply circuit or the communication circuit to the sunroof motor assembly or the sunroof motor assembly may be defective.

TROUBLESHOOTING HINTS
- Malfunction of the sunroof motor assembly
- Damaged harness wires or connectors

DIAGNOSIS

Required Special Tools:
- MB991223: Harness Set
- MB991958: Scan Tool (MUT-III Sub Assembly)
- MB991824: Vehicles communication interface
- MB991827: MUT-III USB cable
- MB991911: MUT-III Main harness B
- MB991813: SWS monitor kit
- MB991806: SWS monitor cartridge
- MB991812: SWS monitor harness (for column-ECU)
- MB991922: Probe harness

STEP 1. Check sunroof motor assembly connector D-06 by backprobing in order to the fusible link (5) line of the power supply circuit to the sunroof motor assembly.




1. Measure at sunroof motor assembly connector D-06 without disconnecting it.




2. Measure the voltage between terminal 1 and ground by backprobing.
- The measured value should be approximately 12 volts (battery positive voltage).

Q: Does the measured voltage correspond with this range?

YES: Go to Step 4.

NO: Go to Step 2.




STEP 2. Check sunroof motor assembly connector D-06 for damage.

Q: Is sunroof motor assembly connector D-06 in good condition?

YES: Go to Step 3.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. The system should communicate with the sunroof motor assembly (sunroof-ECU) normally.













STEP 3. Check the wiring harness between sunroof motor assembly connector D-06 (terminal 1) and fusible link (5).

NOTE: Also check intermediate connectors C-31 and C-89. If intermediate connector C-31 or C-89 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between sunroof motor assembly connector D-06 (terminal 1) and fusible link (5) in good condition?

YES: No action to be taken.

NO: Repair the wiring harness. The system should communicate with the sunroof motor assembly (sunroof-ECU) normally.

STEP 4. Check sunroof motor assembly connector D-06 by backprobing in order to the battery line of the power supply circuit to the sunroof motor assembly.




1. Measure at sunroof motor assembly connector D-06 without disconnecting it.




2. Measure the voltage between terminal 3 and ground by backprobing.
- The measured value should be approximately 12 volts (battery positive voltage).

Q: Does the measured voltage correspond with this range?

YES: Go to Step 7.

NO: Go to Step 5.




STEP 5. Check sunroof motor assembly connector D-06 for damage.

Q: Is sunroof motor assembly connector D-06 in good condition?

YES: Go to Step 6.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. The system should communicate with the sunroof motor assembly (sunroof-ECU) normally.
















STEP 6. Check the wiring harness between sunroof motor assembly connector D-06 (terminal 3) and fusible link (2).

NOTE: Also check intermediate connectors C-31, C-89 and joint connector C-78. If intermediate connector C-31, C-89 and joint connector C-78 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between sunroof motor assembly connector D-06 (terminal 3) and fusible link (2) in good condition?

YES: No action to be taken.

NO: Repair the wiring harness. The system should communicate with the sunroof motor assembly (sunroof-ECU) normally.

STEP 7. Check sunroof motor assembly connector D-06 by backprobing in order to the ignition switch (IG2) line of the power supply circuit to the sunroof motor assembly.




1. Measure at sunroof motor assembly connector D-06 without disconnecting it.
2. Turn the ignition switch to the "ON" position.




3. Measure the voltage between terminal 2 and ground by backprobing.
- The measured value should be approximately 12 volts (battery positive voltage).

Q: Does the measured voltage correspond with this range?

YES: Go to Step 10.

NO: Go to Step 8.




STEP 8. Check sunroof motor assembly connector D-06 for damage.

Q: Is sunroof motor assembly connector D-06 in good condition?

YES: Go to Step 9.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. The system should communicate with the sunroof motor assembly (sunroof-ECU) normally.







STEP 9. Check the wiring harness between sunroof motor assembly connector D-06 (terminal 2) and ignition switch (IG2).

NOTE: Also check junction block connectors C-102 and C-111. If junction block connector C-102 or C-111 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between sunroof motor assembly connector D-06 (terminal 2) and the ignition switch (IG2) in good condition?

YES: No action to be taken.

NO: Repair the wiring harness. The system should communicate with the sunroof motor assembly (sunroof-ECU) normally.

STEP 10. Measure at sunroof motor assembly connector D-06 in order to check the ground circuit to the sunroof motor assembly.




1. Disconnect sunroof motor connector D-06, and measure at the wiring harness side.




2. Measure the resistance value between terminal 5 and ground.
- The measured value should be 2 ohm or less.

Q: Does the measured resistance value correspond with this range?

YES: Go to Step 13.

NO: Go to Step 11.




STEP 11. Check sunroof motor assembly connector D-06 for damage.

Q: Is sunroof motor assembly connector D-06 in good condition?

YES: Go to Step 12.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. The system should communicate with the sunroof motor assembly (sunroof-ECU) normally.




STEP 12. Check the wiring harness between sunroof motor connector D-06 (terminal 5) and ground.

Q: Is the wiring harness between sunroof motor assembly connector D-06 (terminal 5) and ground in good condition?

YES: No action to be taken.

NO: Repair the wiring harness. The system should communicate with the sunroof motor assembly (sunroof-ECU) normally.







STEP 13. Check sunroof motor assembly connector D-06 and ETACS-ECU connector C-118 for damage.

Q: Are sunroof motor assembly connector D-06 and ETACS-ECU connector C-118 in good condition?

YES: Go to Step 14.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. The system should communicate with the sunroof motor assembly (sunroof-ECU) normally.










STEP 14. Check the wiring harness between sunroof motor assembly connector D-06 (terminal 10) and ETACS-ECU connector C-118 (terminal 59).

NOTE: Also check intermediate connector C-31 and joint connector C-78. If intermediate connector C-31 or joint connector C-78 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between sunroof motor assembly connector D-06 (terminal 10) and ETACS-ECU connector C-118 (terminal 59) in good condition?

YES: Go to Step 15.

NO: Repair the wiring harness. The system should communicate with the sunroof motor assembly (sunroof-ECU) normally.

STEP 15. Replace the sunroof motor assembly.

1. Replace the sunroof motor assembly.
2. The system should communicate with the sunroof motor assembly normally.

Q: Can the system communicate with the sunroof motor assembly?

YES: No action to be taken.

NO: Replace the ETACS-ECU. The system should communicate with the sunroof motor assembly (sunroof-ECU) normally.
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