B1315

DTC B1315 Time-out error (TN latch close)






CIRCUIT OPERATION

At opening or closing operation, when the tonneau panel is lowered, the convertible top control module stops applying current to the solenoid valve (rotary drive cylinder) to control the hydraulic pressure to the rotary drive cylinder. As a result, the tonneau latch is closed. Then, when the tonneau latch switch (latched) is turned ON, this control is terminated.

DTC SET CONDITION

This DTC is set when a signal from the tonneau latch switch (latched) is not turned ON after the operation above continues for approximately five seconds.

TROUBLESHOOTING HINTS

- OFF failure of the tonneau latch switch (latched)
- Damaged harness wires and connectors
- Malfunction of hydraulic circuit
- Malfunction of the convertible top control module

NOTE:
When OFF failure occurs in tonneau latch switch (latched), DTC B1307 or B1308 is set at the same time.

DIAGNOSIS

Required Special Tools

- 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, read diagnostic trouble code.

Q. Is DTC B1307 or B1308 set?

YES [DTC B1307 is set] : Perform troubleshooting for DTC B1307.
YES [DTC B1308 is set] : Perform troubleshooting for DTC B1308.
NO : Go to Step 2.
STEP 2. Hydraulic circuit check

Check the hydraulic circuit to the rotary drive cylinder.

Q. Is the check result satisfactory?

YES Go to Step 3.
NO Repair or replace the damaged component(s).
STEP 3. Check tonneau latch switch connector F-28 for loose, corroded or damaged terminals, or terminals pushed back in the connector.





Q. Is the check result satisfactory?

YES Go to Step 4.

NO Repair or replace the damaged component(s).

STEP 4. Tonneau latch switch (Latched) check

Check for continuity at the tonneau latch switch (Latched).





Q. Is the check result satisfactory?

YES Go to Step 5.
NO Replace the tonneau latch switch.
STEP 5. Check convertible top control module connector F-26 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-26 (terminal 17) and tonneau latch switch connector F-28 (terminal 3), the harness between convertible top control module connector F-26 (terminal 19) and tonneau latch switch connector F-28 (terminal 3) or the harness between tonneau latch switch connector F-28 (terminal 2) and ground.





Check the wiring harness for short circuit.

Q. Is the check result satisfactory?

YES Go to Step 7.

NO Repair the harness wire.

STEP 7. Recheck the DTC.

Q. Is DTC B1315 set?

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