Inspection Procedure 1: The RV meter does not show any information.




CIRCUIT OPERATION



  • The RV meter receives the ACC signal from the ignition switch via the harness wire.
  • The RV meter receives the IG1 signal from the ETACS-ECU by CAN communication, and at the same time it supplementally receives the signal from the ignition switch via the harness wire.
    note The IG1 signal via the ignition switch is used when the IG1 signal cannot be received by CAN communication.

COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • Malfunction of the RV meter
  • Malfunction of the ETACS-ECU
  • Malfunction of the CAN bus line
  • Damaged harness wires and connectors

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. Check whether the diagnosis code is set.
Check if the diagnosis code is set.

Q. Is the diagnosis code set?
Go to Step 3
Diagnose RV meter (Refer to RV meter, Troubleshooting ).

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 ETACS-ECU, Troubleshooting ). After diagnosing the ETACS-ECU, go to Step 4.
Go to Step 4

STEP 4. Check the following connector: C-171 RV meter connector


Q. Is the check result normal?

Go to Step 5

Repair the defective connector.

STEP 5. Measure the resistance at C-171 RV meter connector.


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

(2)Measure the resistance between C-171 RV meter connector terminal No.14 and body earth
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?

Go to Step 7

Go to Step 6

STEP 6. Check the harness wire between C-171 RV meter connector terminal No.14 and body earth.



  • Check the earth wires for open circuit.
note Prior to the wiring harness inspection, check joint connector C-120 <RHD>, and repair if necessary.

Q. Is the check result normal?

Retest the system.

Repair the wiring harness.

STEP 7. Measure the voltage at C-171 RV meter connector.


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

(3)Measure the voltage between C-171 RV meter connector terminal No.12 and body earth
OK: System voltage

Q. Is the check result normal?

Go to Step 9

Go to Step 8

STEP 8. Check the harness wire between battery (fusible link No.20) and C-171 RV meter connector terminal No.12.






note Prior to the wiring harness inspection, check joint connector C-132, junction block connectors C-209 and C-213, and repair if necessary.

  • Check the battery power supply open circuit and short circuit.

Q. Is the check result normal?

Retest the system.

Repair the wiring harness.

STEP 9. Measure the voltage at C-171 RV meter connector.




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

(3)Measure the voltage between C-171 RV meter connector terminal No.11 and body earth
OK: System voltage

Q. Is the check result normal?

Go to Step 11

Go to Step 10

STEP 10. Check the harness wire between ignition switch (ACC) and C-171 RV meter connector terminal No.11.






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

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

Q. Is the check result normal?

Refer to ignition switch ().

Retest the system.

STEP 11. Measure the voltage at C-171 RV meter connector.




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

(3)Measure the voltage between C-171 RV meter connector terminal No.26 and body earth
OK: System voltage

Q. Is the check result normal?

Go to Step 13

Go to Step 12

STEP 12. Check the harness wire between ignition switch (IG1) and C-171 RV meter connector terminal No.26.






note Prior to the wiring harness inspection, check joint connectors C-132, C-138 and C-137, junction block connectors C-207 and C-209, and repair if necessary.

  • Check the IG (IG1) power supply open circuit and short circuit.

Q. Is the check result normal?

Refer to ignition switch ().

Retest the system.

STEP 13. Replace the RV meter temporarily and retest the system.
Check that the RV meter shows the drive information when the RV meter is replaced temporarily.

Q. Is the check result normal?
Replace the RV meter.
Go to Step 14

STEP 14. Retest the system.
Check that the RV meter RV meter shows the drive information.

Q. Is the check result normal?
The procedure is complete.
Return to Step 1.