Code No. C1431: T/F actuator terminal high VOLT. <Super select 4WD>
Code No. C1432: T/F actuator terminal low VOLT. <Super select 4WD>
Code No. C1433: T/F actuator terminal HI current <Super select 4WD>
Code No. C1434: T/F actuator terminal LO current <Super select 4WD>
Code No. C1435: T/F ACT.terminal driven circuit <Super select 4WD>
OPERATION
- When voltage is applied to the transfer actuator terminal No.5 from the transfer-ECU, the motor turns to the normal direction and the drive mode is shifted in the order of 2H → 4H → 4HLc. When voltage is applied to the transfer actuator terminal No.6, the motor turns to the reverse direction and the drive mode is shifted in the order of 4HLc → 4H → 2H.
- When voltage is applied to the transfer actuator terminal No.11 from the transfer-ECU, the motor turns to the normal direction and the drive mode is shifted in the order of 4HLc → 4LLc. When voltage is applied to the transfer actuator terminal No.12 from the transfer-ECU, the motor turns to the normal direction and the drive mode is shifted in the order of 4LLc → 4HLc.
DIAGNOSIS CODE SET CONDITIONS
- When power supply voltage rises to 4.9 V or more, the code No.C1431 is set as high voltage.
- When power supply voltage drops to 1.1 V or less, the code No.C1432 is set as low voltage.
- When power supply current rises to 1.0 A or more, the code No.C1433 is set as high current.
- When power supply current drops to 100 mA or less, the code No.C1434 is set as low current.
- When power supply voltage rises to 4.9 V or more, the electric current monitoring circuit offset value is 3.4 V or more, or 0.3 V or less, diagnosis code No.C1435 will be set.
PROBABLE CAUSES
- Malfunction of the transfer actuator
- Damaged harness wires and connectors
- Malfunction of the transfer-ECU
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STEP 1. Check of short to power supply, short to earth, and open circuit in TM1 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 2.
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 Repair the connector(s) or wiring harness.
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STEP 2. Check of short to power supply, short to earth, and open circuit in TM2 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 3.
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Repair the connector(s) or wiring harness.
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STEP 3. Check of short to power supply, short to earth, and open circuit in HM1 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 4.
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Repair the connector(s) or wiring harness.
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STEP 4. Check of short to power supply, short to earth, and open circuit in HM2 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 5.
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Repair the connector(s) or wiring harness.
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STEP 5. Resistance measurement at the transfer actuator connector (transfer motor 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 (transfer motor terminal) and transfer actuator connector (transfer motor terminal).
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Q.
Is the check result normal?
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Go to Step 6.
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Replace the transfer actuator
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STEP 6. Resistance measurement at the transfer actuator connector (High-Low motor 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 (High-Low motor terminal) and transfer actuator connector (High-Low motor terminal).
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Q.
Is the check result normal?
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Go to Step 7.
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Replace the transfer actuator
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STEP 7. 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)Turn the drive mode-selector between "2H" and "4H" position, and check that the transfer motor work.
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(4)Check that the diagnosis code is set again.
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(5)Turn the drive mode-selector between "4HLc" and "4LLc" position, and check that the High/Low motor work.
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(6)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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