Inspection Procedure F-1

Sunroof: Sunroof does not Operate.

Sunroof Motor Assembly Power Supply Circuit Part 1:

Sunroof Motor Assembly Power Supply Circuit Part 2:

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

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

DIAGNOSIS

Required Special Tool:
- MB991223: Test Harness Set

STEP 1. Check the sunroof motor assembly power supply circuit [fusible link (5)] at the sunroof motor assembly connector D-06 by backprobing.




1. Do not disconnect the sunroof motor assembly connector D-06.




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 the 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 sunroof should work normally.













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

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

Q: Are the harness wires 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. Check that the sunroof work normally.

STEP 4. Check the sunroof motor assembly power supply circuit (battery) at the sunroof motor assembly connector D-06 by backprobing.




1. Do not disconnect the sunroof motor assembly connector D-06.




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 sunroof should work normally.










STEP 6. Check the harness wires between sunroof motor assembly connector D-06 (terminal 3) and battery.

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

Q: Are the harness wires between sunroof motor assembly connector D-06 (terminal 3) and battery in good condition?

YES: No action to be taken.

NO: Repair the wiring harness. Check that the sunroof work normally.

STEP 7. Check the sunroof motor assembly power supply circuit [ignition switch (IG2)] at the sunroof motor assembly connector D-06 by backprobing.




1. Do not disconnect the sunroof motor assembly connector D-06.
2. Turn the ignition switch to "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 the 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 sunroof should work normally.







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

NOTE: After checking junction block connectors C-102 and C-111, check the wires. If junction block connectors C-102 or C-111 are damaged, repair or replace the connectors. Refer to Harness Connector Inspection.

Q: Are the harness wires between sunroof motor assembly connector C-06 (terminal 2) and ignition switch (IG2) in good condition?

YES: No action to be taken.

NO: Repair the wiring harness. Check that the sunroof work normally.

STEP 10. Check the sunroof motor assembly ground circuit at the sunroof motor assembly connector D-06.




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




2. Measure the resistance 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 the 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 sunroof should work normally.




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

Q: Is the harness wire 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. Check that the sunroof work normally.







STEP 13. Check the sunroof switch.

Q: Does the check above meet the table?

YES: Go to Step 14.

NO: Replace the sunroof switch. The sunroof should work normally.

STEP 14. Check the sunroof switch ground circuit at the sunroof switch connector D-05.




1. Disconnect the sunroof switch connector D-05 and measure at the harness side.




2. Measure the resistance between terminal 4 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 17.

NO: Go to Step 15.




STEP 15. Check the sunroof switch connector D-05 for damage.

Q: Is sunroof switch connector D-05 in good condition?

YES: Go to Step 16.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. The sunroof should work normally.




STEP 16. Check the harness wire between sunroof switch connector D-05 (terminal 4) and ground.

Q: Is the harness wire between sunroof switch connector D-05 (terminal 4) and ground in good condition?

YES: No action to be taken.

NO: Repair the wiring harness. Check that the sunroof work normally.




STEP 17. Check the sunroof switch connector D-05 and sunroof motor assembly connector D-06 for damage.

Q: Are sunroof switch connector D-05 and sunroof motor assembly connector D-06 in good condition?

YES: Replace the sunroof motor assembly. Check that the sunroof works normally.

NO: Repair or replace the connectors. Refer to Harness Connector Inspection.