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Code No.17 Throttle
Position Sensor, Idle Position Signal System
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DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set if the Idle position signal voltage is 2.5 volts or less and
the throttle position sensor voltage is 4.0 -
5.5 volts for four seconds or more, and
the Idle position signal voltage is 4.0 -
5.5 volts and the throttle position sensor
voltage is 0.4 -
1.0 volt for four seconds or more.
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PROBABLE CAUSES
- Malfunction of the connector.
- Malfunction of the harness.
- Malfunction of the throttle position sensor.
- Malfunction of the engine-A/T-ECU.
- Malfunction of the auto-cruise control-ECU.
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STEP 1. Check the throttle position sensor. Q: Is the MPI system MUT-II/III diagnosis code No. 14 set?
YES:
Refer to GROUP 13B - Troubleshooting  . Then
go to Step 11  .
NO:
Go to Step 2 .
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STEP 2. 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 1 and body earth.
- OK: 4.0 -
5.5 volts (When accelerator
pedal is fully depressed).
- 0.4 -
1.0 volt (When accelerator pedal is released).
Q: Is the check result normal?
YES:
Go to Step 5 .
NO:
Go to Step 3 .
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STEP 3. Check auto-cruise control-ECU connector C-113 and intermediate
connectors C-106 <L.H. drive vehicles only>
and joint connector (1) C-16 <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 11 .
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STEP 4. Check the harness between the auto-cruise control-ECU C-113
and throttle position sensor connector B-06. Q: Is the check result normal?
YES:
Go to Step 10 .
NO:
Repair harness. Then go to Step 11 .
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STEP 5. Measure at engine-A/T-ECU connector C-110.
Do not disconnect engine-A/T-ECU connector C-110 and measure
at the backprobing.
- Auto-cruise control MAIN switch: ON
- Voltage between terminal 79 and body earth.
OK: 4.0 -
5.5 volts
Q: Is the check result normal?
YES:
Go to Step 8 .
NO:
Go to Step 6 .
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STEP 6. Check engine-A/T-ECU connector C-110. Q: Is the check result normal?
YES:
Go to Step 7 .
NO:
Repair or replace connector. Then go to Step 11 .
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STEP 7. Check the MUT-II/III diagnosis code No.17. Q: Is the MUT-II/III diagnosis code No. 17 set?
YES:
Replace the engine-A/T-ECU (Refer to GROUP 13B - Engine-A/T-ECU ). 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 8. Check auto-cruise control-ECU connector C-113 and intermediate
connectors C-106 <L.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-ECU C-113
and engine-A/T-ECU connector C-110. Q: Is the check result normal?
YES:
Go to Step 10 .
NO:
Repair harness. Then go to Step 11 .
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STEP 10. Check the MUT-II/III diagnosis code No.17. Q: Is the MUT-II/III diagnosis code No. 17 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.17. Q: Is the MUT-II/III diagnosis code No. 17 set?
YES:
Return to Step 1 .
NO:
This procedure is complete.
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