Code No. C1430: Transfer position SW <Easy select 4WD>
OPERATION
System voltage is applied to the each transfer actuator from the transfer-ECU.
DIAGNOSIS CODE SET CONDITIONS
- When the transfer changeover is not completed while driving, code No. C1430 is set for abnormality of each transfer actuator.
- When the transfer changeover is not completed while the vehicle is stopped, code No. C1430 is set for abnormality of each transfer actuator.
- When the abnormality of each transfer actuator is detected all the time, code No. C1430 is set.
PROBABLE CAUSES
- Damaged harness wires and connectors
- Malfunction of the transfer actuator
- Malfunction of the transfer-ECU
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STEP 1. M.U.T.-III diagnosis code
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Check if diagnosis code is set in the transfer-ECU.
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Q.
Is the diagnosis code set?
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 Troubleshoot the transfer-ECU. Refer to  .
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 Go to Step 2.
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STEP 2. Resistance measurement at the transfer actuator connector (earth terminal).
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(1)Disconnect the connector, and measure at the wiring harness side.
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(2)Measure the resistance between the transfer actuator connector (earth terminal) and body earth.
OK: Continuity exists (2 Ω or less)
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Q.
Is the check result normal?
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Go to Step 4.
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Go to Step 3.
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STEP 3. Check of open circuit in earth line between the transfer actuator connector (earth terminal) and body earth.
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Q.
Is the check result normal?
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Go to Step 4.
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Repair the connector(s) or wiring harness.
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STEP 4. Voltage measurement at transfer actuator connector (Transfer limit switch 1 terminal).
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(2)Disconnect the connector, and measure at the wiring harness side.
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(3)Check the voltage between the transfer actuator connector (Transfer limit switch 1 terminal) and body earth.
OK: System voltage
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Q.
Is the check result normal?
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Go to Step 6.
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Go to Step 5.
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STEP 5. Check of short to earth, and open circuit in TL1 line between transfer-ECU and transfer actuator connector.
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Q.
Is the check result normal?
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Go to Step 6.
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Repair the connector(s) or wiring harness.
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STEP 6. Voltage measurement at transfer actuator connector (Transfer limit switch 2 terminal).
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(2)Disconnect the connector, and measure at the wiring harness side.
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(3)Check the voltage between the transfer actuator connector (Transfer limit switch 2 terminal) and body earth.
OK: System voltage
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Q.
Is the check result normal?
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Go to Step 8.
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Go to Step 7.
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STEP 7. Check of short to earth, and open circuit in TL2 line between transfer-ECU and transfer actuator connector.
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Q.
Is the check result normal?
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Go to Step 8.
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Repair the connector(s) or wiring harness.
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STEP 8. Voltage measurement at transfer actuator connector (Transfer limit switch 3 terminal).
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(2)Disconnect the connector, and measure at the wiring harness side.
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(3)Check the voltage between the transfer actuator connector (Transfer limit switch 3 terminal) and body earth.
OK: System voltage
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Q.
Is the check result normal?
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Go to Step 10.
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Go to Step 9.
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STEP 9. Check of short to earth, and open circuit in TL3 line between transfer-ECU and transfer actuator connector.
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Q.
Is the check result normal?
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Go to Step 10.
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Repair the connector(s) or wiring harness.
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STEP 10. Voltage measurement at transfer actuator connector (4WD detection switch terminal).
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(2)Disconnect the connector, and measure at the wiring harness side.
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(3)Check the voltage between the transfer actuator connector (4WD detection switch terminal) and body earth.
OK: System voltage
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Q.
Is the check result normal?
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Go to Step 12.
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Go to Step 11.
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STEP 11. Check of short to earth, and open circuit in HL1 line between transfer-ECU and transfer actuator connector.
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Q.
Is the check result normal?
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Go to Step 12.
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Repair the connector(s) or wiring harness.
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STEP 12. Voltage measurement at transfer actuator connector (4L detection switch terminal).
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(2)Disconnect the connector, and measure at the wiring harness side.
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(3)Check the voltage between the transfer actuator connector (4L detection switch terminal) and body earth.
OK: System voltage
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Q.
Is the check result normal?
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Go to Step 14.
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Go to Step 13.
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STEP 13. Check of short to earth, and open circuit in 4WD line between transfer-ECU and transfer actuator connector.
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Q.
Is the check result normal?
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Go to Step 14.
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Repair the connector(s) or wiring harness.
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STEP 14. Check of short to power supply circuit in TL1 line between transfer-ECU and transfer actuator connector.
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Q.
Is the check result normal?
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Go to Step 15.
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Repair the connector(s) or wiring harness.
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STEP 15. Check of short to power supply circuit in TL2 line between transfer-ECU and transfer actuator connector.
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Q.
Is the check result normal?
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Go to Step 16.
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Repair the connector(s) or wiring harness.
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STEP 16. Check of short to power supply circuit in TL3 line between transfer-ECU and transfer actuator connector.
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Q.
Is the check result normal?
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Go to Step 17.
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Repair the connector(s) or wiring harness.
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STEP 17. Check of short to power supply circuit in HL1 line between transfer-ECU and transfer actuator connector.
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Q.
Is the check result normal?
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Go to Step 18.
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Repair the connector(s) or wiring harness.
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STEP 18. Check of short to power supply circuit in 4WD line between transfer-ECU and transfer actuator connector.
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Q.
Is the check result normal?
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Go to Step 19.
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Repair the connector(s) or wiring harness.
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STEP 19. Check whether the diagnosis code is set again.
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Check again if the diagnosis code is set in the transfer-ECU.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch to the "LOCK" (OFF) position once, and then turn it to the ON position again.
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(3)Check that diagnosis code is not set again.
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Q.
Is diagnosis code set?
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Go to Step 26.
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Go to Step 20.
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STEP 20. Drive mode-selector "2H" position check.
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(2)Turn the ignition switch to the "LOCK" (OFF) position.
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(3)Turn the drive mode-selector to the "2H" position.
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(4)Turn the ignition switch to the ON position.
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(5)Check again if the diagnosis code is set in the transfer-ECU.
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Q.
Is diagnosis code set?
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Go to Step 26.
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Go to Step 21.
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STEP 21. M.U.T.-III data list
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Use the transfer-ECU service data to check the signals related to the operation of drive mode-selector.
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Item No.
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Item name
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Normal condition
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28
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T/F limit switch 1
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ON
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29
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T/F limit switch 2
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OFF
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30
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T/F limit switch 3
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OFF
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31
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4WD position switch
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OFF
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32
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4WDL position switch
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OFF
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OK: Normal condition are displayed.
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Q.
Are the check result normal?
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Go to Step 22.
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Go to Step 26.
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STEP 22. Drive mode-selector "4H" position check.
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(2)Turn the ignition switch to the "LOCK" (OFF) position.
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(3)Turn the drive mode-selector to the "4H" position.
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(4)Turn the ignition switch to the ON position.
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(5)Check again if the diagnosis code is set in the transfer-ECU.
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Q.
Is diagnosis code set?
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Go to Step 26.
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Go to Step 23.
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STEP 23. M.U.T.-III data list
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Use the transfer-ECU service data to check the signals related to the operation of drive mode-selector.
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Item No.
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Item name
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Normal condition
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28
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T/F limit switch 1
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OFF
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29
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T/F limit switch 2
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OFF
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30
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T/F limit switch 3
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ON
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31
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4WD position switch
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ON
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32
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4WDL position switch
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OFF
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OK: Normal condition are displayed.
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Q.
Are the check result normal?
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Go to Step 24.
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Go to Step 26.
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STEP 24. Drive mode-selector "4L" position check.
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(2)Turn the ignition switch to the "LOCK" (OFF) position.
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(3)Turn the drive mode-selector to the "4L" position.
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(4)Turn the ignition switch to the ON position.
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(5)Depress the clutch pedal <M/T> or the selector lever to the N position <A/T>.
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(6)Check again if the diagnosis code is set in the transfer-ECU.
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Q.
Is diagnosis code set?
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Go to Step 26.
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Go to Step 25.
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STEP 25. M.U.T.-III data list
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Use the transfer-ECU service data to check the signals related to the operation of drive mode-selector.
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Item No.
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Item name
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Normal condition
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28
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T/F limit switch 1
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OFF
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29
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T/F limit switch 2
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ON
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30
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T/F limit switch 3
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OFF
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31
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4WD position switch
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ON
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32
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4WDL position switch
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ON
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OK: Normal condition are displayed.
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Q.
Are the check result normal?
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The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
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Go to Step 26.
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STEP 26. Transfer actuator check.
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(1)Disconnect the transfer actuator connector, and measure at the transfer actuator side.
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(2)Measure the resistance between the transfer actuator connector (transfer limit switch 1 terminal) and transfer actuator connector (earth terminal).
ON: Continuity exists (2 Ω or less)
OFF: No continuity
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(3)Measure the resistance between the transfer actuator connector (transfer limit switch 2 terminal) and transfer actuator connector (earth terminal).
ON: Continuity exists (2 Ω or less)
OFF: No continuity
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(4)Measure the resistance between the transfer actuator connector (transfer limit switch 3 terminal) and transfer actuator connector (earth terminal).
ON: Continuity exists (2 Ω or less)
OFF: No continuity
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(5)Measure the resistance between the transfer actuator connector (4WD detection switch terminal) and transfer actuator connector (earth terminal).
ON: Continuity exists (2 Ω or less)
OFF: No continuity
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(6)Measure the resistance between the transfer actuator connector (4L detection switch terminal) and transfer actuator connector (earth terminal).
ON: Continuity exists (2 Ω or less)
OFF: No continuity
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(7)Check whether the following table is satisfied.
Item
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Abnormal condition
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Transfer limit switch 1
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ON
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ON
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OFF
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OFF
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OFF
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ON
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OFF
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ON
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Transfer limit switch 2
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OFF
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OFF
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OFF
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ON
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ON
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ON
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OFF
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ON
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Transfer limit switch 3
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OFF
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ON
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ON
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ON
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OFF
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ON
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OFF
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OFF
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4WD detection switch
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ON or OFF
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ON or OFF
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ON or OFF
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OFF
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OFF
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ON or OFF
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ON or OFF
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ON or OFF
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4L detection switch
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ON
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ON
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ON
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ON or OFF
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ON or OFF
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ON or OFF
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ON or OFF
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ON or OFF
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Q.
Are the check result Abnormal?
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Replace the transfer actuator.
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Go to Step 27.
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STEP 27. Check whether the diagnosis code is set again.
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Check again if the diagnosis code is set in the transfer-ECU.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
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(3)Check that the diagnosis code is set again.
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Q.
Is the diagnosis code set?
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Replace the transfer-ECU (Refer to ).
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The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
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