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Code No.15 Auto-cruise Control Switch System
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DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set if the auto-cruise control RESUME switch or SET switch remains ON.
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PROBABLE CAUSES
- Malfunction of the connector.
- Malfunction of the harness.
- Malfunction of the auto-cruise control switch.
- Malfunction of the clock spring.
- Malfunction of the auto-cruise control-ECU.
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STEP 1. Measure at auto-cruise control switch connector C-301.
Disconnect auto-cruise control switch connector C-301 and measure at the harness side.
- Voltage between terminal 1 and body earth.
OK: System voltage
Q: Is the check result normal?
YES:
Go to Step 5  .
NO:
Go to Step 2 .
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STEP 2. Check the clock spring.
Refer to GROUP 52B - Air Bag Module and Clock Spring Inspection  .
Q: Is the check result normal?
YES:
Go to Step 3 .
NO:
Replace the clock spring. (Refer to GROUP 52B - Air Bag Module and Clock Spring ). Then go to Step 11 .
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STEP 3. Check auto-cruise control switch connector C-301, clock spring connectors C-308 and C-309, junction block connector C-205 and intermediate connector C-302. Q: Is the check result normal?
YES:
Go to Step 4 .
NO:
Repair or replace connector. Then go to Step 11 .
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STEP 4. Check the harness between the junction block connector C-205 and auto-cruise control switch connector C-301. Q: Is the check result normal?
YES:
This malfunction is intermittent. (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points ).
NO:
Repair harness. Then go to Step 11 .
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STEP 5. Measure at auto-cruise control-ECU connector C-113.
Do not disconnect auto-cruise control-ECU connector C-113 and measure at the backprobing.
- Auto-cruise control MAIN switch: ON
- Voltage between terminal 9 and body earth.
- OK: 2.3 - 3.5 volts (When auto-cruise control RESUME switch ON).
- 0.4 - 2.3 volts (When auto-cruise control SET switch ON).
Q: Is the check result normal?
YES:
Go to Step 10 .
NO:
Go to Step 6 .
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STEP 6. Check the auto-cruise control switch.
Refer to .
Q: Is the check result normal?
YES:
Go to Step 7 .
NO:
Replace the auto-cruise control switch. (Refer to ). Then go to Step 11 .
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STEP 7. Check the clock spring.
Refer to GROUP 52B - Air Bag Module and Clock Spring Inspection .
Q: Is the check result normal?
YES:
Go to Step 8 .
NO:
Replace the clock spring. (Refer to GROUP 52B - Air Bag Module and Clock Spring ). Then go to Step 11 .
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STEP 8. Check auto-cruise control switch connector C-301, clock spring connectors C-308 and C-309, auto-cruise control-ECU connector C-113 and intermediate connector C-302 and C-106 <R.H. drive vehicles only>. Q: Is the check result normal?
YES:
Go to Step 9 .
NO:
Repair or replace connector. Then go to Step 11 .
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STEP 9. Check the harness between the auto-cruise control switch connector C-301 and auto-cruise control-ECU connector C-113. Q: Is the check result normal?
YES:
This malfunction is intermittent (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points ).
NO:
Repair harness. Then go to Step 11 .
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STEP 10. Check the MUT-II/III diagnosis code No. 15. Q: Is the MUT-II/III diagnosis code No. 15 set?
YES:
Replace the auto-cruise control-ECU. (Refer to ). Then go to Step 11 .
NO:
This malfunction is intermittent (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points ).
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STEP 11. Check the MUT-II/III diagnosis code No. 15. Q: Is the MUT-II/III diagnosis code No. 15 set?
YES:
Return to Step 1 .
NO:
This procedure is complete.
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