35C-DTC C2276 Brake switch signal

DTC C2276 Brake switch signal

caution

If there is any problem in the CAN bus lines, an incorrect DTC may be set. Prior to this diagnosis, diagnose the CAN bus lines.
Whenever the ECU is replaced, ensure that the CAN bus lines are normal.

OPERATION

FCM/LDW/AHB-ECU communicates with the ETACS-ECU via the CAN bus lines.

DTC SET CONDITION

This DTC is set when the abnormality below is detected:

The ECU receives an invalid stoplight switch signal from the ETACS-ECU.

TROUBLESHOOTING HINTS

Malfunction of the CAN bus line
Malfunction of the ETACS-ECU
Malfunction of the FCM/LDW/AHB-ECU

DIAGNOSIS

STEP 1. Scan tool (M.U.T.-IIISE) CAN bus diagnostics.

(1)

caution

To prevent damage to scan tool (M.U.T.-IIISE), always turn off the power supply mode of the electric motor switch before connecting or disconnecting scan tool (M.U.T.-IIISE).

Connect scan tool (M.U.T.-IIISE). Refer to "How to connect the Scan Tool (M.U.T.-IIISE)

(2) Turn on the power supply mode of the electric motor switch.

(3) Diagnose the CAN bus line.

(4) Turn off the power supply mode of the electric motor switch.

Is the check result normal?

Go to Step 2

Repair the CAN bus lines (Refer to GROUP 54C - Troubleshooting

STEP 2. Check whether the DTC is set again.

Check again if the DTC is set in the FCM/LDW/AHB-ECU.

(1) Erase the DTC.

(2) Turn off the power supply mode of the electric motor switch.

(3) Turn on the power supply mode of the electric motor switch.

(4) Check if DTC is set.

Is the DTC set?

Replace the ETACS-ECU (Refer to GROUP 54A - ETACS-ECU

) and then go to Step 3

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction

STEP 3. Check whether the DTC is set again.