B1302

DTC B1302: 5bow sensor: L=ON/R=OFF
DTC B1303: 5bow sensor: L=OFF/R=ON

CAUTION:
These DTC can be set when the convertible top is opened or closed by manual operation while the ignition switch is ON position. Carry out the troubleshooting after conforming the presence or absence of manual operation.






CIRCUIT OPERATION

- The convertible top control module judges the convertible top operating state based on the signals from the sensors and switches.
- 5-bow sensor is the one of those sensors and the convertible top control module mounts 5-bow sensor (UP), 5-bow sensor (DOWN) (RH), and 5-bow sensor (DOWN) (LH). They output the following signals to the convertible top control module according to the open/close state of the convertible top.





DTC SET CONDITION

This DTC is set as a 5-bow sensor (DOWN) error if the LH and RH 5-bow sensors (DOWN) output different signals which are unavailable in the normal condition.

TROUBLESHOOTING HINTS

- ON or OFF failure of any 5-bow sensor (DOWN) (including defective sensor power supply line or signal line)
- 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. Using scan tool MB991958, check data list.

(1)Close the convertible top.

(2)Use scan tool MB991958 to check the following service data (Refer to Data Reference Table).

- Item 10: 5-bow sensor down (left)
- Item 11: 5-bow sensor down (right)
OK: "ON" appears.


Q. Is the check result satisfactory?

YES : Go to Step 8.
NO (Item 10: OFF) : Go to Step 2.
NO (Item 11: OFF) : Go to Step 5.
STEP 2. Check convertible top control module connector F-26, F-27 and 5-bow sensor (DOWN) (LH) connector F-16 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 harness between convertible top control module connector F-27 (terminal 1) and 5-bow sensor (DOWN) (LH) connector F-16 (terminal 2), and between convertible top control module connector F-26 (terminal 12) and 5-bow sensor (DOWN) (LH) connector F-16 (terminal 1).





Check the power supply line and the signal line of the 5-bow sensor (DOWN) (LH) for open or short circuit.

Q. Is the check result satisfactory?

YES Replace the 5-bow sensor (DOWN) (LH). Then go to Step 4.

NO Repair the harness wire.

STEP 4. Using scan tool MB991958, check data list.

Use scan tool MB991958 to check the following service data (Refer to Data Reference Table).

- Item 10: 5-bow sensor down (left)

OK: "ON" appears.


Q. Is the check result satisfactory?

YES The procedure is complete.
NO Replace the convertible top control module.
STEP 5. Check convertible top control module connector F-26, F-27 and 5-bow sensor (DOWN) (RH) connector F-22 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Is the check result satisfactory?

YES Go to Step 6.

NO Repair or replace the damaged component(s).

STEP 6. Check the harness between convertible top control module connector F-27 (terminal 1) and 5-bow sensor (DOWN) (RH) connector F-22 (terminal 2), and between convertible top control module connector F-26 (terminal 13) and 5-bow sensor (DOWN) (RH) connector F-22 (terminal 1).





Check the power supply line and the signal line of the 5-bow sensor (DOWN) (RH) for open or short circuit.

Q. Is the check result satisfactory?

YES Replace the 5-bow sensor (DOWN) (RH). Then go to Step 7.

NO Repair the harness wire.

STEP 7. Using scan tool MB991958, check data list.

Use scan tool MB991958 to check the following service data (Refer to Data Reference Table).

- Item 11: 5-bow sensor down (right)

OK: "ON" appears.


Q. Is the check result satisfactory?

YES The procedure is complete.
NO Replace the convertible top control module.
STEP 8. Using scan tool MB991958, check data list.

(1)Close the convertible top.

(2)Use scan tool MB991958 to check the following service data (Refer to Data Reference Table).

- Item 10: 5-bow sensor down (left)
- Item 11: 5-bow sensor down (right)
OK: "OFF" appears.


Q. Is the check result satisfactory?

YES : Go to Step 10.
NO (Item 10: ON) : Replace the 5-bow sensor (DOWN) (LH). Then go to Step 9.
NO (Item 11: ON) : Replace the 5-bow sensor (DOWN) (RH). Then go to Step 9.
STEP 9. Using scan tool MB991958, check data list.

Use scan tool MB991958 to check the following service data (Refer to Data Reference Table).

- Item 10: 5-bow sensor down (left)
- Item 11: 5-bow sensor down (right)

OK: "OFF" appears.


Q. Is the check result satisfactory?

YES The procedure is complete.
NO Replace the convertible top control module.
STEP 10. Recheck the DTC.

Q. Is DTC B1302 or B1303 set?

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