Wireless Control Module

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.

TPMS DTC SET CONDITION
WCM incorporates the EEPROM (nonvolatile memory). The EEPROM stores the TPMS information. If the data in EEPROM fails, this code is set.

TROUBLESHOOTING HINTS
The most likely causes for this DTC to set are:
- Damaged wiring harness and connector.
- Malfunction of WCM.

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 MB991958, diagnose the CAN bus lines.

Q: Is the check result normal?

YES : Go to Step 3.

NO : Repair the CAN bus lines. On completion, go to Step 2.

STEP 2. Diagnostic trouble code recheck after resetting CAN bus lines.
1. Turn the ignition switch to the "ON" position.
2. Erase the DTC.
3. Turn the ignition switch to the "LOCK" (OFF) position.
4. Turn the ignition switch to the "ON" position.
5. Check if the DTC is set.
6. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the diagnostic trouble code C1608 set?

YES : Replace the WCM and register the ID codes. Then go to Step 3.

NO : The procedure is complete.

STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is set.
1. Turn the ignition switch to the "ON" position.
2. Erase the DTC.
3. Turn the ignition switch to the "LOCK" (OFF) position.
4. Turn the ignition switch to the "ON" position.
5. Check if the DTC is set.
6. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the diagnostic trouble code C1608 reset?

YES : Replace the WCM and register the ID codes. Then start over at Step 1.

NO : The procedure is complete.