Inspection Procedure F-1
Sunroof: Sunroof Does Not OperateSunroof Motor Assembly Power Supply Circuit:
Connectors:
CIRCUIT OPERATION
- The sunroof motor assembly is energized by the battery through fusible link (4) and battery.
- 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 circuit (battery) at the sunroof motor assembly connector D-06 by back probing.
1. Do not disconnect the sunroof motor assembly connector D-06.
2. Measure the voltage between terminal 3 and ground by back probing.
Q: Is the voltage approximately 12 volts (battery positive voltage)?
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 it. Refer to Harness Connector Inspection. The sunroof should work normally.
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.
Q: Are the harness wires between sunroof motor assembly connector D-06 and battery in good condition?
YES: There is no action to be taken.
NO: Repair or replace them. The sunroof should work normally.
STEP 4. Check the sunroof motor assembly power supply circuit [fusible link (4)] at the sunroof motor assembly connector D-06 by back probing.
1. Do not disconnect the sunroof motor assembly connector D-08.
2. Measure the voltage between terminal 1 and ground by back probing.
Q: Is the voltage approximately 12 volts (battery positive voltage)?
YES: Go to Step 7.
NO: Go to Step 5.
STEP 5. Check the sunroof motor assembly connector D-08 for damage.
Q: Is sunroof motor assembly connector D-06 in good condition?
YES: Go to Step 6.
NO: Repair or replace it. Refer to Harness Connector Inspection. The sunroof should work normally.
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.
Q: Are the harness wires between sunroof motor assembly connector D-06 and fusible link (4) In good condition?
YES: There is no action to be taken.
NO: Repair or replace them. The sunroof should work normally.
STEP 7. Check the sunroof motor assembly power supply circuit [ignition switch (IG2)] at the sunroof motor assembly connector D-06 by back probing.
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 back probing.
Q: Is the voltage approximately 12 volts (battery positive voltage)?
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 it. Refer to Harness Connector Inspection. The sunroof should work normally.
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.
Q: Are the harness wires between sunroof motor assembly connector D-06 and ignition switch (IG2) in good condition?
YES: There is no action to be taken.
NO: 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. Measure the resistance between terminal 5 and ground.
Q: Is the resistance less than 2 ohms?
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 it. Refer to Harness Connector Inspection. The sunroof should work normally.
STEP 12. Check the harness wire between sunroof motor assembly connector D-06 and ground.
Q: Is the harness wire between sunroof motor assembly connotes D-06 and ground in good condition?
YES: There is no action to be taken.
NO: Repair it. The sunroof should 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 connector D-05 for damage.
Q: Is sunroof switch connector D-05 in good condition?
YES: Go to Step 15.
NO: Repair or replace it. Refer to Harness Connector Inspection. The sunroof should work normally.
STEP 15. Check the harness wire between sunroof switch connector D-05 and ground.
Q: Is the harness wire between sunroof switch connector D-05 and ground In good condition?
YES: There is no action to be taken.
NO: Repair it. The sunroof should work normally.