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Code No.14 Stop Lamp Switch System
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DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set when none of the drive signals from the release valve, control valve and motor of the auto-cruise vacuum pump are input to the auto-cruise control-ECU.
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PROBABLE CAUSES
- Malfunction of the connector.
- Malfunction of the harness.
- Malfunction of the stop lamp switch.
- Malfunction of the auto-cruise vacuum pump.
- Malfunction of the auto-cruise control-ECU.
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STEP 1. Measure at auto-cruise vacuum pump connector A-03.
Disconnect auto-cruise vacuum pump connector A-03 and measure at the harness side.
- Auto-cruise control MAIN switch: ON
- Voltage between terminal 1 and body earth.
OK: 10 volts or more (When brake pedal is released).
Q: Is the check result normal?
YES:
Go to Step 2  .
NO:
Go to Step 5 .
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STEP 2. Check the auto-cruise vacuum pump.
Refer to  .
Q: Is the check result normal?
YES:
Go to Step 3 .
NO:
Replace the auto-cruise vacuum pump. (Refer to ). Then go to Step 14 .
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STEP 3. Check auto-cruise vacuum pump connector A-03, auto-cruise control-ECU connector C-113 and intermediate connectors C-14 and C-106 <R.H. drive vehicles only>. Q: Is the check result normal?
YES:
Go to Step 4 .
NO:
Repair or replace connector. Then go to Step 14 .
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STEP 4. Check the harness between the auto-cruise vacuum pump connector A-03 and auto-cruise control-ECU connector C-113. Q: Is the check result normal?
YES:
Go to Step 13 .
NO:
Repair harness. Then go to Step 14 .
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STEP 5. Measure at stop lamp switch connector C-101.
Disconnect stop lamp switch connector C-101 and measure at the harness side.
- Auto-cruise control MAIN switch: ON
- Voltage between terminal 3 and body earth.
OK: 10 volts or more
Q: Is the check result normal?
YES:
Go to Step 6 .
NO:
Go to Step 9 .
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STEP 6. Check the stop lamp switch.
Refer to .
Q: Is the check result normal?
YES:
Go to Step 7 .
NO:
Replace the stop lamp switch. (Refer to GROUP 35A - Brake Pedal ). Then go to Step 14 .
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STEP 7. Check stop lamp switch connector C-101, auto-cruise vacuum pump connector A-03 and intermediate connectors C-14. Q: Is the check result normal?
YES:
Go to Step 8 .
NO:
Repair or replace connector. Then go to Step 14 .
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STEP 8. Check the harness between the stop lamp switch connector C-101 and auto-cruise vacuum pump connector A-03. 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 14 .
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STEP 9. 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 5 and body earth.
OK: 10 volts or more (When brake pedal is released).
Q: Is the check result normal?
YES:
Go to Step 10 .
NO:
Go to Step 12 .
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STEP 10. Check stop lamp switch connector C-101 and intermediate connector C-106 <R.H. drive vehicles only>. Q: Is the check result normal?
YES:
Go to Step 11 .
NO:
Repair or replace connector. Then go to Step 14 .
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STEP 11. Check the harness between the stop lamp switch connector C-101 and auto-cruise control-ECU connector C-113. Q: Is the check result normal?
YES:
Go to Step 13 .
NO:
Repair harness. Then go to Step 14 .
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STEP 12. Check auto-cruise control-ECU connector C-113. Q: Is the check result normal?
YES:
Go to Step 13 .
NO:
Repair or replace connector. Then go to Step 14 .
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STEP 13. Check the MUT-II/III diagnosis code No.14. Q: Is the MUT-II/III diagnosis code No. 14 set?
YES:
Replace the auto-cruise control-ECU. (Refer to ). Then go to Step 14 .
NO:
This malfunction is intermittent. (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points ).
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STEP 14. Check the MUT-II/III diagnosis code No.14. Q: Is the MUT-II/III diagnosis code No. 14 set?
YES:
Return to Step 1 .
NO:
This procedure is complete.
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