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Inspection Procedure
4: Auto-cruise Control cannot be Set.
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COMMENTS ON TROUBLE SYMPTOM
The fail-safe function is probably cancelling auto-cruise control. In this case, MUT-II/III
can be used to Retest each system by checking the diagnosis trouble codes. The MUT-II/III can
also be used to check if the circuits of each input switch are normal or not by checking the
input switch codes.
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PROBABLE CAUSES
- Malfunction of the auto-cruise control switch.
- Malfunction of the stop lamp switch.
- Malfunction of the inhibitor switch.
- Malfunction of the engine-A/T-ECU.
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STEP 1. Check the MUT-II/III diagnosis code Q: Is any diagnosis code set?
YES:
Refer to  , Check Chart for Diagnosis Codes. Then
go to Step 6  .
NO:
Go to Step 2 .
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STEP 2. MUT-II/III data list
Item 04: Cancel switch (Refer to data list reference table ).
Q: Is the check result normal?
YES:
Go to Step 3 .
NO:
Refer to , Symptom Procedures number 3. Then go
to Step 6 .
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STEP 3. MUT-II/III data list - Item 05: Stop lamp switch (Refer to data list reference table ).
- Item 06: Brake switch (Refer to data list reference table ).
Q: Is the check result normal?
YES:
Go to Step 4 .
NO:
Refer to , Symptom Procedures number 1. Then go
to Step 6 .
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STEP 4. MUT-II/III data list
Item 07, Inhibitor switch (Refer to data list reference table ).
Q: Is the check result normal?
YES:
Go to Step 5
NO:
Refer to , Symptom Procedures number 2. Then go
to Step 6
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STEP 5. Check the symptoms. Q: Can auto-cruise control be set?
YES:
It can be assumed that this malfunction is intermittent.
NO:
Replace the engine-A/T-ECU (Refer to GROUP 13C, Engine-A/T-ECU ).
Then go to Step 6 .
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STEP 6. Check the symptoms. Q: Can auto-cruise control be set?
YES:
The procedure is complete.
NO:
Return to Step 1 .
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