Keyless Operation System (KOS)

DTC C1608: EEPROM Error

CAUTION:
If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines Scan Tool Testing and Procedures).

DTC SET CONDITION

KOS incorporates EEPROM (nonvolatile memory), and that EEPROM stores the TPMS, KOS and immobilizer information. When the data in EEPROM is failed, this code is set.

TROUBLESHOOTING HINTS

The most likely causes for this DTC to set are:

- Damaged wiring harness and connector

- Malfunction of KOS-ECU

DIAGNOSIS

Required Special Tools:

- MB991958 Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: Vehicle Communication Interface (V.C.I.)

- MB991827 M.U.T.-III USB Cable

- MB991910 M.U.T.-III Main Harness A

STEP 1. M.U.T.-III CAN bus diagnostics

Use scan tool to diagnose the CAN bus lines.

Q. Is the check result normal?

YES Go to Step 2.
NO Repair the CAN bus lines CAN Bus Line Diagnostics Flow).
On completion, go to Step 2.
STEP 2. Diagnostic trouble code check

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

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

(3)Check if the DTC is set.

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

Q. Is the DTC C1608 set?

YES Replace the KOS-ECU and register the ID codes (Refer to ID Codes Registration Procedure).
Then go to Step 3.
NO The procedure is complete.
STEP 3. Diagnostic trouble code check

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

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

(3)Check if the DTC is set.

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

Q. Is the DTC C1608 set?

YES Start over at Step 1.
NO The procedure is complete.