If diagnosis
code No.24 is set in the CAN adapter, diagnose the CAN main bus line.
Whenever the ECU is replaced, ensure that the communication circuit is normal.
TROUBLE JUDGMENT
If the RV meter communication signal (IG ON signal from ETACS- ECU, buzzer request signal
from RV meter) is not communicated from the CAN adapter, the diagnosis code No. 24 is set.
COMMENT ON TROUBLE SYMPTOM
The harness or connector between the RV meter and CAN adapter may be faulty.
PROBABLE CAUSES
Malfunction of the CAN adapter
Damaged harness wires and connectors
Malfunction of the CAN bus
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. Connector check: RV meter connector C-109 and CAN adapter
connector C-110
Q.
Is the check result normal?
Go to Step 3.
Repair the defective connector.
STEP 3. Check the harness wires between RV meter connector C-109 (terminal
6) and CAN adapter connector C-110 (terminal 2).
Q.
Is the check result normal?
Go to Step 4.
Repair the wiring harness.
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 check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 -
How
to use Troubleshooting/inspection Service Points -
How to Cope with Intermittent
Malfunction ).
Replace the CAN adapter, go to Step 5.
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.
)
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C -
Troubleshooting 
).
On completion, go to Step 2.)
)
)