Code No. 26: Engine CAN Timeout


caution
  • If diagnosis code No.26 is set in the RV meter, diagnose the CAN main bus line.
  • Whenever the RV meter is replaced, ensure that the communication circuit is normal.
note When the diagnosis codes relating to the CAN communication error are set, make sure of the vehicle equipment. When the vehicle is not equipped with the system the RV meter communicates to, the diagnosis code is always output. This is not abnormal.

TROUBLE JUDGEMENT


If the engine ECU is not communicated from the RV meter, the diagnosis code No. 26 is set.

COMMENT ON TROUBLE SYMPTOM


The harness or connector between the engine-ECU and RV meter may be faulty.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.

Q. Is the check result normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting ). On completion, go to Step 2.

STEP 2. M.U.T-III other system diagnosis code.
Check whether the DIESEL system-related diagnosis code is set.

Q. Is the diagnosis code set?
Diagnose DIESEL system. (Refer to GROUP 13A - Troubleshooting .) After diagnosing the DIESEL system, go to Step 3.
Go to Step 3.

STEP 3. M.U.T-III other system diagnosis code.
Check if a diagnosis code, which relates to CAN communication-linked systems below, is set.

    ETACS-ECU

    • diagnosis code U1100: Engine-ECU time-out

Q. Is the diagnosis code set?
Go to Step 4.
Go to Step 5.

STEP 4. Check whether the diagnosis code is reset.
Check again if the diagnosis code is set.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3)On completion, check that the diagnosis code is not reset.

Q. Is the diagnosis code set?
Replace the engine-ECU.
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 5. Check whether the diagnosis code is reset.
Recheck if the diagnosis code is set.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3)On completion, check that the diagnosis code is not reset.

Q. Is the diagnosis code set?
Replace the RV meter.
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).