B1309

DTC B1309 Timeout error (5bow up)






CIRCUIT OPERATION

When opening operation is performed, the convertible top control module drives the pump motor and at the same time applies current to the solenoid valve (5-bow locking cylinder) and the solenoid valve (5-bow cylinder) to control the hydraulic pressure to each power cylinder. As a result, the 5-bow rises. Then, when the 5-bow sensor (UP) is turned ON, this control is terminated.

DTC SET CONDITION

This DTC is set when the 5-bow sensor (UP) signal is not turned ON after the operation above persists for a specified period (approximately 10 seconds) when opening operation is performed.

TROUBLESHOOTING HINTS

- OFF failure of the 5-bow sensor (UP)
- Malfunction of the convertible top relay
- Malfunction of the convertible top pump motor
- Malfunction of the solenoid valve (5-bow locking cylinder)
- Malfunction of the solenoid valve (5-bow cylinder)
- Damaged harness wires and connectors
- Malfunction of hydraulic circuit
- 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. Check the convertible top operation.

When the convertible top is opened, check that the 5-bow rises and stops in approximately 5 seconds.

Q. Does the 5-bow rise when the convertible top is opened?

YES (stops in approximately 5 seconds.) : Go to Step 2.
YES (stops in approximately 10 seconds.) : If it takes approximately 10 seconds to stop, the operation is stopped by the convertible top control module fail-safe function. In this case, the hydraulic circuit may be defective.
Check the hydraulic circuit.
NO Go to Step 4.
STEP 2. Using scan tool MB991958, check data list.

(1)Open the convertible top.

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

- Item 09: 5-bow sensor up
OK: "ON" appears.


Q. Is the check result satisfactory?

YES Intermittent malfunction How to Cope With Intermittent Malfunctions).
NO Replace the 5-bow sensor (UP). Then go to Step 3.
STEP 3. Using scan tool MB991958, check data list.

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

- Item 09: 5-bow sensor up

OK: "ON" appears.


Q. Is the check result satisfactory?

YES This diagnosis is complete.
NO Replace the convertible top control module.
STEP 4. Check the pump motor operating sound.

Q. Is the pump motor operated when the convertible top is opened?

YES Go to Step 5.
NO Perform troubleshooting referring to "Symptom Procedure 2: Pump motor does not operate." (Refer to Inspection Procedure 2.)
STEP 5. Check convertible top control module connector F-27 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. Measure the resistance at convertible top control module connector F-27.





(1)Disconnect convertible top control module connector F-27, and measure at the wiring harness side.





(2)Measure the resistance between terminal 5 and 10.

- The measured value should be 5 - 7ohms .

Q. Is the check result satisfactory?

YES Go to Step 9.

NO Go to Step 7.

STEP 7. Check solenoid valve (5-bow locking cylinder) connector F-19 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Is the check result satisfactory?

YES Go to Step 8.

NO Repair or replace the damaged component(s).

STEP 8. Solenoid valve (5-bow locking cylinder) check

Check that the resistance value of the solenoid valve (5-bow locking cylinder) is within the standard value range.

Standard value: 5 - 7ohms


Q. Is the check result satisfactory?

YES Check the harness between convertible top control module connector F-27 (terminal 5, 10) and solenoid valve (5-bow locking cylinder) connector F-19 (terminal 2, 1). Repair as necessary.
NO Replace the solenoid valve (tonneau latch cylinder).
STEP 9. Measure the resistance at convertible top control module connector F-27.





(1)Disconnect convertible top control module connector F-27, and measure at the wiring harness side.





(2)Measure the resistance between terminal 5 and 9.

- The measured value should be 5 - 7ohms .

Q. Is the check result satisfactory?

YES Go to Step 12.

NO Go to Step 10.

STEP 10. Check solenoid valve (5-bow cylinder) connector F-18 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. Solenoid valve (5-bow cylinder) check

Check that the resistance value of the solenoid valve (5-bow cylinder) is within the standard value range.

Standard value: 5 - 7ohms


Q. Is the check result satisfactory?

YES Check the harness between convertible top control module connector F-27 (terminal 5, 9) and solenoid valve (5-bow cylinder) connector F-18 (terminal 2, 1). Repair as necessary.
NO Replace the solenoid valve (5-bow cylinder).
STEP 12. Check the hydraulic circuit.

Check the hydraulic circuit to the 5-bow locking cylinder and 5-bow cylinder.

Q. Is the check result satisfactory?

YES Go to Step 13.
NO Repair or replace the damaged component(s).
STEP 13. Recheck the DTC.

Q. Is DTC B1309 set?

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