Code No. C1460: Drive mode selector circuit failure


caution If there is any problem in the CAN bus lines, an incorrect diagnosis code may be set. Prior to this diagnosis, always diagnose the CAN bus lines.

OPERATION



DIAGNOSIS CODE SET CONDITIONS




  • Drive mode selector internal short
  • IG1 voltage: 7 V or more

PROBABLE CAUSES


Current trouble
  • Drive mode selector internal short
  • Short to earth between 4WD-ECU and the drive mode selector
  • 4WD-ECU malfunction
Past trouble
  • Intermittent wiring harness or connector failure
    note For diagnosis procedures, refer to "How to treat past trouble". (Refer to GROUP 00, How to Treat Past Trouble .)
  • Intermittent malfunction of drive mode selector

DIAGNOSIS PROCEDURE

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

Q. Is the check result normal?
Go to Step 3.
Repair the CAN bus line. (Refer to GROUP 54C - Troubleshooting .) On completion, go to Step 2.

STEP 2. Check whether the diagnosis code is reset after repairing the CAN bus line.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from the LOCK (OFF) position to the ON position and hold there for 15 seconds.
(3)Check that the meter display is correct when the drive mode selector is switched to each position (2WD, 4WD, and LOCK).
(4)Check if the diagnosis code is set.

Q. Is the diagnosis code No. C1460 set?
Go to Step 3.
This diagnosis is complete.

STEP 3. M.U.T.-III data list
Check the following service data. (Refer to .)

  • Item 10: 2WD SW
  • Item 11: LOCK SW

Q. Is the check result normal?
Replace 4WD-ECU. (Refer to .)
Go to Step 4.

STEP 4. Check the following connector:
Check the connectors below for improper engagement, terminal damage or terminal drawn in the connector case.

  • C-130 4WD-ECU connector
  • C-25 Drive mode selector connector
  • C-36 intermediate connector

Q. Are the connectors and terminals in good condition?
Go to Step 5.
Repair the connector(s) or terminal(s). Then go to Step 10.

STEP 5. Wiring harness check
Check the wiring harness between the C-130 4WD-ECU connector and the C-25 drive mode selector connector for damage or other problem.

Q. Is the wiring harness in good condition?
Go to Step 6.
Repair damage or other problem in the wiring harness. Then go to Step 10.

STEP 6. Resistance measurement between the drive mode selector connector terminals
Disconnect the C-25 connector, and measure the resistance value between the connector terminals on the drive mode selector side. (Refer to .)
Standard value: Continuity exists (2 Ω or less).

Q. Is the measured resistance value within the standard value range?
Go to Step 7.
Replace the drive mode selector. (Refer to .) Then go to Step 10.

STEP 7. Voltage measurement at the 4WD-ECU connector
(1)Disconnect the C-130 4WD-ECU connector.
(2)Measure the voltage between the C-130 wiring harness side connector terminals No. 4 and No. 10.
OK: Battery voltage

Q. Is the check result normal?
Go to Step 9.
Go to Step 8.

STEP 8. Wiring harness check

  • Wiring harness between the C-130 4WD-ECU connector and the C-313 ETACS-ECU connector
  • Wiring harness between the C-130 4WD-ECU connector and the C-317 ETACS-ECU connector
Check the wiring harness above for damage or other problem.

Q. Is the wiring harness in good condition?
Go to Step 9.
Repair the wiring harness. Then go to Step 10.

STEP 9. Check whether the diagnosis code is reset.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from the LOCK (OFF) position to the ON position and hold there for 15 seconds.
(3)Check that the meter display is correct when the drive mode selector is switched to each position (2WD, 4WD, and LOCK).
(4)Check if the diagnosis code is set.

Q. Is the diagnosis code No. C1460 set?
Replace 4WD-ECU. (Refer to .) Then go to Step 10.
The trouble can be an intermittent malfunction. (Refer to GROUP 00 - How to Cope with Intermittent Malfunction .)

STEP 10. Check whether the diagnosis code is reset.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from the LOCK (OFF) position to the ON position and hold there for 15 seconds.
(3)Check that the meter display is correct when the drive mode selector is switched to each position (2WD, 4WD, and LOCK).
(4)Check if the diagnosis code is set.

Q. Is the diagnosis code No. C1460 set?
Diagnose again from Step 1.
This diagnosis is complete.