B1316

DTC B1316 Timeout error (Topstack up)






CIRCUIT OPERATION

At closing operation, when the tonneau panel is opened, the convertible top control module applies current to the solenoid valve (tonneau latch cylinder) in addition to the solenoid valve (tonneau drive cylinder) to control the hydraulic pressure to the rotary drive cylinder. As a result, the convertible top rises. Then, when the convertible top position switch (up) is turned ON, this control is terminated.

DTC SET CONDITION

This DTC is set when a signal from the convertible top position switch (up) is not turned ON after the operation above continues for approximately 20 seconds.

TROUBLESHOOTING HINTS

- OFF failure of the convertible top position switch (up)
- Malfunction of the solenoid valve (tonneau latch 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 closed, check that the convertible top rises and stops in approximately 9 seconds.

Q. Does the convertible top rise when the convertible top is closed?

YES (stops in approximately 8 seconds.) : Go to Step 7.
YES (stops in approximately 10 seconds.) : If it takes approximately 20 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 2.
STEP 2. 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 3.

NO Repair or replace the damaged component(s).

STEP 3. 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 6.
The measured resistance should be 5 - 7ohms .

Q. Is the check result satisfactory?

YES Go to Step 6.

NO Go to Step 4.

STEP 4. Check solenoid valve (tonneau latch cylinder) connector F-24 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. Solenoid valve (tonneau latch cylinder) check

Check that the resistance value of the solenoid valve (tonneau latch 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, 6) and solenoid valve (tonneau latch cylinder) connector F-24 (terminal 2, 1). Repair as necessary.
NO Replace the solenoid valve (tonneau latch cylinder).
STEP 6. Hydraulic circuit check

Check the hydraulic circuit to the rotary drive cylinder.

Q. Is the check result satisfactory?

YES Replace the convertible top control module.
NO Repair or replace the damaged component(s).
STEP 7. Check convertible top position switch connector F-29 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. Convertible top position switch check

Check for continuity at the convertible top position switch (up).





Q. Is the check result satisfactory?

YES Go to Step 9.
NO Replace the convertible top position switch.
STEP 9. Measure the voltage at the convertible top control module connector.





(1)Disconnect convertible top position switch connector F-29, and measure at the wiring harness side.





(2)Measure the voltage between terminal 2 and ground.

- The measured value should be approximately 8 volts.

Q. Is the check result satisfactory?

YES Go to Step 10.

NO Check the harness between convertible top control module connector F-27 (terminal 1) and convertible top position switch connector F-29 (terminal 2). Repair as necessary.

STEP 10. Check the harness between convertible top control module connector F-26 (terminal 14) and convertible top position switch connector F-29 (terminal 1).





Check the signal line of the convertible top position switch (up) for open or short circuit.

Q. Is the check result satisfactory?

YES Go to Step 11.

NO Repair the harness wire.

STEP 11. Recheck the DTC.

Q. Is DTC B1316 set?

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