Inspection Procedure 4: The Drive Information is not Displayed Normal.




CIRCUIT OPERATION


RV meter receives the vehicle speed signal and average injected fuel amount signal from the engine-ECU and from the fuel gauge unit. Then, RV meter displays the average vehicle speed, average fuel consumption, and possible cruising distance.

COMMENTS ON TROUBLE SYMPTOM


Harness between RV meter and engine-ECU, harness between RV meter and fuel gauge unit, RV meter, engine-ECU, CAN adapter, or fuel gauge unit 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 satisfactory?
Go to Step 2
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 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 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 4.

STEP 4. Connector check: Fuel gauge unit connector F-09

Q. Is the check result normal?

Go to Step 5.

Repair the defective connector.

STEP 5. Check the fuel gauge unit.
Check the fuel gauge unit .

Q. Is the check result normal?
Go to Step 6.
Replace the fuel gauge unit.

STEP 6. Check the communication and connection (the fuel gauge unit) of the service function.
Using the connection status of the automatic mode in the service function, check the status of fuel gauge unit. (Refer to .)
note If the fuel is full, "Full or Disconnected" of abnormal condition is displayed. Therefore, check that the fuel is not full, and then check the status display of service function for the fuel gauge unit.
Item name
 Normal condition
Fuel.
 OK
OK: Normal condition is displayed.

Q. Is the check result normal?
Go to Step 11.
Go to Step 7.

STEP 7. Measure the resistance at F-09 fuel gauge unit connector.

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

(2)Resistance between F-09 fuel gauge unit connector terminal No.2 and body earth
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?

Go to Step 9.

Go to Step 8.

STEP 8. Check the harness wire between F-09 fuel gauge unit connector terminal No.2 and body earth.


  • Check the earth wires for open circuit.

Q. Is the check result normal?

Retest the system.

Repair the wiring harness.

STEP 9. Connector check: RV meter connector C-108


Q. Is the check result normal?

Go to Step 10.

Repair the defective connector.

STEP 10. Check the wiring harness between C-108 RV meter connector terminal No.13 and F-09 fuel gauge unit connector terminal No.1.



note Prior to the wiring harness inspection, check the intermediate connector C-30, and repair if necessary.

  • Check the input line circuit.

Q. Is the check result normal?

Go to Step 11.

Repair the wiring harness.

STEP 11. Recheck for malfunction.

Q. Is a malfunction eliminated?
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.