Inspection Procedure 2: "Please Turn the Ignition Key to the ON Position." is Continuously Displayed.




CIRCUIT OPERATION


If the RV meter operates when the ignition switch is in other than the ON position*, or if the RV meter operates when there is an abnormality to the CAN adapter power supply or earth, "Please turn the ignition key to the ON position" is displayed.
note *: When the system connection status is completed even once after the battery is connected and the ignition switch is turned to the ON position, "Please turn the ignition key to the ON position" is not displayed even the RV meter is activated with the ignition switch in the ACC position.

COMMENTS ON TROUBLE SYMPTOM


Ignition switch ON signal, CAN adapter power supply, earth, RV meter, or CAN adapter may be faulty.

PROBABLE CAUSES




DIAGNOSIS PROCEDURE

STEP 1. Check the communication and connection (ignition switch (IG1)) of the service function.
Using the signal check of the automatic mode in the service function, check the key position status. (Refer to .)
Item name
 Normal condition
Key position
 IG
OK: Normal condition is displayed.

Q. Is the check result normal?
Go to Step 5.
Go to Step 2.

STEP 2. M.U.T.-III CAN bus diagnostics
Use the M.U.T-III to diagnose the CAN bus lines.

Q. Is the check result satisfactory?
Go to Step 3
Repair the CAN bus lines (Refer to GROUP 54C, Diagnosis - Can Bus Diagnostics Table ). After diagnosing the CAN bus lines, go to Step 3.

STEP 3. M.U.T.-III other system diagnosis code.
Check whether the ETACS-ECU diagnosis code is set.

Q. Is the diagnosis code set?
Diagnose ETACS-ECU (Refer to ).
Go to Step 4.

STEP 4. M.U.T.-III diagnosis code.
When the ignition switch is turned to the "LOCK" (OFF) position, check that the CAN adapter does not set the diagnosis code.

Q. Is the diagnosis code set?
Refer to diagnosis code chart .
Go to Step 10.

STEP 5. Check the following connector: C-110 CAN adapter connector


Q. Is the check result normal?

Go to Step 6.

Repair the defective connector.

STEP 6. Measure the resistance at C-110 CAN adapter connector.


(1)Disconnect the connector, and measure at the wiring harness side.

(2)Resistance between C-110 fuel pump and gauge unit connector terminal No.4 and body earth
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?

Go to Step 8.

Go to Step 7.

STEP 7. Check the harness wire between C-110 CAN adapter connector terminal No.4 and body earth.



note Prior to the wiring harness inspection, check joint connector C-120, and repair if necessary.

  • Check the earth circuit.

Q. Is the check result normal?

Go to Step 8.

Repair the wiring harness.

STEP 8. Measure the voltage at C-110 CAN adapter connector.




(1)Disconnect the connector, and measure at the wiring harness side.
(2)Ignition switch: ON

(3)Voltage between C-110 CAN adapter connector terminal No.1 and body earth
OK: System voltage

Q. Is the check result normal?

Go to Step 10.

Go to Step 9.

STEP 9. Check the harness wire between ignition switch (ACC) and C-110 CAN adapter connector terminal No.1.





note Prior to the wiring harness inspection, check joint connector C-127, junction block connector C-207 and C-208, and repair if necessary.

  • Check the IG (ACC) power supply open circuit.

Q. Is the check result normal?

Retest the system.

Repair the wiring harness.

STEP 10. Replace the RV meter temporarily and retest the system.
Check that the CAN adapter correctly when the RV meter is replaced temporarily.

Q. Is the check result normal?
If no malfunctions are found in all steps, an intermittent malfunction is suspected. Refer to GROUP 00,How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .
Replace the RV meter.