35C-DTC C1707 Implausible coding data

DTC C1707 Implausible coding data

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 communication circuit is normal.

OPERATION

FCM/LDW/AHB-ECU receives the vehicle information stored in ETACS-ECU via CAN bus lines.

DTC SET CONDITION

This DTC is set when the abnormality below is detected:

A unfeasible coding data is received from ETACS-ECU.

TROUBLESHOOTING HINTS

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

DIAGNOSIS

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

(1)

caution

To prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).

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

(2) Turn the ignition switch to the "ON" position.

(3) Diagnose the CAN bus line.

(4) Turn the ignition switch to the "LOCK" (OFF) position.

Is the check result normal?

Go to Step 2

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

STEP 2. ETACS-ECU coding data check

Using the M.U.T.-III, check if there is the FCM type2, LDW Parameter status abnormality to the coding data stored in the ETACS-ECU (Refer to GROUP 00 - Coding Reference Table

Is the check result normal?

Go to Step 3

Go to Step 4

STEP 3. 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 the ignition switch from "LOCK" (OFF) position to "ON" position.

(3) Check if DTC is set.

Is the DTC set?

Replace the FCM/LDW/AHB-ECU (Refer to

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