B1320

DTC B1320 Quarter window cancel current






CIRCUIT OPERATION

At convertible top operation, the convertible top control module applies current to the power window motor (quarter) to lower the quarter window glass. When it detects the motor lock current from the power window motor (quarter), it determines that the quarter window glass is lowered to the end, and then stops this control.

DTC SET CONDITION

This DTC is set when the convertible top control module does not detect the motor lock current from the power window motor (quarter) after the convertible top control module applies current to the power window motor (quarter) for a specified period (approximately 10 seconds).

TROUBLESHOOTING HINTS

- Malfunction of the power window motor (quarter)
- Damaged harness wires and connectors
- Malfunction of the convertible top control module

DIAGNOSIS

Required Special Tool

- MB991958 Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827 M.U.T.-III USB Cable
- MB991910 M.U.T.-III Main Harness A
- MB992006: Extra fine probe

STEP 1. Retest the system.

Q. Which power window does not operate, the left one or the right?

LH : Go to Step 2.
RH : Go to Step 6.
Both : Go to Step 10.
STEP 2. Check power window motor (quarter: LH) connector D-47 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Is the check result satisfactory?

YES Go to Step 3.

NO Repair or replace the damaged component(s).

STEP 3. Check the power window motor (quarter: LH).

Connect the power window motor (quarter: LH) to the battery.

Q. Does the motor rotate?

YES Go to Step 4.
NO Replace the power window motor (quarter: LH).
STEP 4. Check convertible top control module connector D-46 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Is the check result satisfactory?

YES Go to Step 5.

NO Repair or replace the damaged component(s).

STEP 5. Check the harness between power window motor (quarter: LH) connector D-47 (terminal 1, 2) and convertible top control module connector D-46 (terminal 61, 62).





- Check for power supply and short circuit of the relevant harness.

Q. Is the check result satisfactory?

YES Go to Step 12.

NO Repair the harness wire.

STEP 6. Check power window motor (quarter: RH) connector D-37 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Is the check result satisfactory?

YES Go to Step 7.

NO Repair or replace the damaged component(s).

STEP 7. Check the power window motor (quarter: RH).

Connect the power window motor (quarter: RH) to the battery.

Q. Does the motor rotate?

YES Go to Step 8.
NO Replace the power window motor (quarter: RH).
STEP 8. Check convertible top control module connector D-46 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Is the check result satisfactory?

YES Go to Step 9.

NO Repair or replace the damaged component(s).

STEP 9. Check the harness between power window motor (quarter: LH) connector D-37 (terminal 1, 2) and convertible top control module connector D-46 (terminal 63, 64).









- Check for power supply and short circuit of the relevant harness.

NOTE:
Before the wiring harness check, check the intermediate connector D-40, and repair if necessary.

Q. Is the check result satisfactory?

YES Go to Step 12.

NO Repair the harness wire.

STEP 10. Check convertible top control module connector D-46 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Is the check result satisfactory?

YES Go to Step 11.

NO Repair or replace the damaged component(s).

STEP 11. Measure the voltage at convertible top control module connector D-46.





(1)Disconnect convertible top control module connector D-46, and measure at the wiring harness side.
(2)Turn the ignition switch to the "ON" position.





(3)Measure the voltage between terminal 71 and ground.

- The measured value should be approximately 12 volts (battery positive voltage).

Q. Is the check result satisfactory?

YES Go to Step 10.

NO Check the wiring harness between convertible top control module connector D-46 (terminal 71) and power window relay. Repair as necessary.

STEP 12. Recheck the DTC.

Q. Is DTC B1320 set?

YES Replace the convertible top control module.
NO Intermittent malfunction How to Cope With Intermittent Malfunctions).