Code No.32, 33: Transfer detection switch system
OPERATION
- System voltage is applied to the each detection switch (terminal No.1)
from the transfer-ECU (terminal No.43, No.44, No.45, No.46 or
No.47).
- The each detection switch is grounded through the transfer case to the
vehicle body.
DIAGNOSIS CODE SET CONDITIONS
In the case that the transfer
shifting has not been completed during driving, the code No.32 is set as the
open circuit or the short circuit of each transfer detection switch system,
malfunction of the shift actuator or the malfunction of the transfer shift
mechanism. In the case that the input signal from each transfer detection
switch is unstable, the code No.33 is set as the open circuit or the short
circuit of each transfer detection switch system.
PROBABLE CAUSES
- Malfunction of the each transfer detection switch
- Damaged harness wires and connectors
- Malfunction of the transfer-ECU
- Malfunction of the shift actuator
- Malfunction of the transfer shift mechanism
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STEP 1. M.U.T.-III actuator test
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Item 2, 3: Shift actuator (Refer to data list
reference table  ).
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Q.
Is the check result normal?
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 Go to Step 2.
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 Replace the shift actuator (Refer to
GROUP 22B - Transfer ).
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STEP 2. M.U.T.-III data list
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Item 7: Transfer position (Refer to data list
reference table ).
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Q.
Is the check result normal?
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Intermittent malfunction (Refer to
GROUP 00 - How to Cope with Intermittent Malfunction ).
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Go to Step 3.
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STEP 3. Check the transfer shift lever switch.
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Refer to .
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Q.
Is the check result normal?
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Go to Step 4.
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Replace the transfer shift lever
switch (Refer to ).
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STEP 4. Measure the voltage at each detection switch connectors C-08,
C-09, C-12, C-13, C-14.
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(1)Disconnect the connectors, and measure the voltage between
terminal No.1 and earth at the wiring harness side.
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(2)Turn the ignition switch to the ON
position.
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 5.
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STEP 5. Measure the voltage at transfer-ECU connector
D-123.
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(1)Disconnect the connector, and measure the voltage between
terminal No.43, No.44, No.45, No.46, No.47 and earth at the wiring harness
side.
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(2)Turn the ignition switch to the ON
position.
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 6.
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STEP 6. Connector check: C-08, C-09, C-12, C-13, C-14 each detection
switch connectors, D-123 transfer-ECU connector.
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Check for the contact with terminals.
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Q.
Is the check result normal?
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Go to Step 7.
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Repair
the defective connector.
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STEP 7. Check the harnesses between each detection switch connectors
C-08, C-09, C-12, C-13, C-14 terminal No.1 and transfer-ECU connector
D-123 terminals No.43, No.44, No.45, No.46, No.47.
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Check the output line for short
circuit.
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Q.
Is the check result normal?
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Go to Step 11.
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Repair
the wiring harness.
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STEP 8. Connector check: C-08, C-09, C-12, C-13, C-14 each detection
switch connectors, D-123 transfer-ECU connector.
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Check for the contact with terminals.
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Q.
Is the check result normal?
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Go to Step 9.
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Repair
the defective connector.
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STEP 9. Check the harnesses between each detection switch connectors
C-08, C-09, C-12, C-13, C-14 terminal No.1 and transfer-ECU connector
D-123 terminals No.43, No.44, No.45, No.46, No.47.
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Check the output line for open
circuit.
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Q.
Is the check result normal?
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Go to Step 11.
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Repair
the wiring harness.
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STEP 10. Measure the resistance at each detection switch connectors
C-08, C-09, C-12, C-13, C-14.
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(1)Connect the M.U.T.-III to the diagnosis
connector.
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(2)Turn the ignition switch to the ON position.
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(3)Transmission gear should be neutral position.
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(4)Item 2, 3: Shift actuator.
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(5)Disconnect connectors C-08, C-09, C-12, C-13, C-14, and
measure the voltage between terminal No.1 and earth at the wiring harness
side.
OK:
- When the transfer position is 2H, connector C-08 terminal No.1
resistance should measure less than 2 Ω.
When the transfer
position is other than 2H, connector C-08 terminal No.1 resistance should
measure open circuit.
- When the transfer position is 2H or 4H, connector C-14 terminal No.1
resistance should measure less than 2 Ω.
When the transfer
position is other than 2H or 4H, connector C-14 terminal No.1 resistance
should measure open circuit.
- When the transfer position is 4H or 4HLc, connector C-13 terminal No.1
resistance should measure less than 2 Ω.
When the transfer
position is other than 4H or 4HLc, connector C-13 terminal No.1
resistance should measure open circuit.
- When the transfer position is 4HLc or 4LLc, connector C-12 terminal
No.1 resistance should measure less than 2 Ω.
When the
transfer position is other than 4HLc or 4LLc, connector C-12 terminal
No.1 resistance should measure open circuit.
- When the transfer position is 4LLc, connector C-09 terminal No.1
resistance should measure less than 2 Ω.
When the transfer
position is other than 4LLc, connector C-09 terminal No.1 resistance
should measure open circuit.
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Q.
Is the check result normal?
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Go to Step 11.
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Replace the each detection switch
(Refer to GROUP 22B - Transmission ).
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STEP 11. M.U.T.-III data list
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Item 7: Transfer position (Refer to data list
reference table ).
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Q.
Is the check result normal?
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Intermittent malfunction (Refer to
GROUP 00 - How to Cope with Intermittent Malfunction ).
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Replace the transfer-ECU.
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