Inspection Procedure F-1

Sunroof Motor Assembly Power Supply Circuit:

Connectors:

CIRCUIT OPERATION
- The sunroof motor assembly is energized by the battery through fusible link (4).
- If the ignition switch (IG2) sends a signal, the sunroof motor assembly operates.

TECHNICAL DESCRIPTION (COMMENT)
The power supply circuit of the sunroof motor assembly, the sunroof switch ground circuit, or the sunroof motor assembly may be defective.

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 (battery) at the sunroof motor assembly connector D-06.
1. Disconnect the sunroof motor assembly connector D-06 and measure at the harness side.
2. Voltage between terminal 3 and ground.
- Voltage should be approximately 12 volts (battery positive voltage).
If not approximately 12 volts, go to Step 2.
If approximately 12 volts, go to Step 4.




STEP 2. Check the sunroof motor assembly connector D-06 for damage.
If the sunroof motor assembly connector D-06 is damaged, repair or replace it. Refer to Harness Connector Inspection.
The sunroof should work normally.
If the connector is in good condition, go to Step 3.










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

NOTE: After checking intermediate connector C-89, joint connector C-78, junction block connector C-103 and C-109, check the wires. If intermediate connector C-89, joint connector C-78, junction block connector C-103 and C-109 are damaged, repair or replace them. Refer to Harness Connector Inspection.

If the harness wires between sunroof motor assembly connector D-06 and battery are damaged, repair or replace them.
The sunroof should work normally.




STEP 4. Check the sunroof motor assembly power supply [fusible link (4)] at the sunroof motor assembly connector D-06.
1. Disconnect the sunroof motor assembly connector D-06 and measure at the harness side.
2. Voltage between terminal 1 and ground.
- Voltage should be approximately 12 volts (battery positive voltage).
If not approximately 12 volts, go to Step 5.
If approximately 12 volts, go to Step 7.




STEP 5. Check the sunroof motor assembly connector D-06 for damage.
If the sunroof motor assembly connector D-06 is damaged, repair or replace it. Refer to Harness Connector Inspection.
The sunroof should work normally.
If the connector is in good condition, go to Step 6.













STEP 6. Check the harness wires between sunroof motor assembly connector D-06 and fusible link (4).

NOTE: After checking intermediate connectors C-31 and C-89, check the wires. If intermediate connectors C-31 and C-89 are damaged, repair or replace them. Refer to Harness Connector Inspection.

If the harness wires between sunroof motor assembly connector D-06 and fusible link (4) are damaged, repair or replace them.
The sunroof should work normally.




STEP 7. Check the sunroof motor assembly power supply [ignition switch (IG2)1 at the sunroof motor assembly connector D-06.
1. Disconnect the sunroof motor assembly connector D-06 and measure at the harness side.
2. Turn the ignition switch to "ON" position.
3. Voltage between terminal 2 and ground.
- Voltage should be approximately 12 volts (battery positive voltage).
If not approximately 12 volts, go to Step 8.
If approximately 12 volts, go to Step 10.




STEP 8. Check the sunroof motor assembly connector D-06 for damage.
If the sunroof motor assembly connector D-06 is damaged, repair or replace it. Refer to Harness Connector Inspection.
The sunroof should work normally.

If the connector is in good condition, go to Step 9.










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

NOTE: After checking intermediate connector C-31, joint connector C-77, junction block connector C-101 and C-107, check the wires. If intermediate connector C-31, joint connector C-77, junction block connector C-101 and C-107 are damaged, repair or replace them. Refer to Harness Connector Inspection.

If the harness wires between sunroof motor assembly connector D-06 and ignition switch (IG2) are damaged, repair or replace them.
The sunroof should 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. Resistance between terminal 5 and ground.
- Should be less than 2 Ohms. If open circuit, go to Step 12.
If less than 2 Ohms. go to Step 14.




STEP 12. Check the sunroof motor assembly connector D-06 for damage.
If the sunroof motor assembly connector D-05 is damaged, repair or replace it. Refer to Harness Connector Inspection.
The sunroof should work normally.
If the connector is in good condition, go to Step 13.




STEP 13. Check the harness wire between sunroof motor assembly connector D-06 and ground.
If the harness wire between sunroof motor assembly connector D-06 and ground is damaged, repair it.
The sunroof should work normally.







STEP 14. Check the sunroof switch.
If the check above does not meet the table, replace the sunroof switch.
The sunroof should work normally.
If the check above meets the table, go to Step 15.




STEP 15. Check the sunroof switch connector D-05 for damage.
If the sunroof switch connector D-05 is damaged, repair or replace it. Refer to Harness Connector Inspection.
The sunroof should work normally.
If the connector is in good condition, go to Step 16.




STEP 16. Check the harness wire between sunroof switch connector D-05 and ground.
If the harness wire between sunroof switch connector D-05 and ground is damaged, repair it.
The sunroof should work normally.
If the harness wire is in good condition, replace the sunroof motor.
The sunroof should work normally.