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Code No.22 Stop
Lamp Switch System
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OPERATION
- Battery positive voltage is supplied to the stop lamp switch (terminal 2
and 4).
- When the brake pedal is depressed, battery positive voltage is applied to the engine-A/T-ECU
(terminal 39 and 54).
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DIAGNOSIS CODE SET CONDITIONS
Check Condition
- The "CRUISE" indicator light illuminates.
Judgement Criteria
- Short in stop lamp switch circuit.
- Open circuit in the brake switch circuit (between engine-A/T-ECU terminal 54 and earth).
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PROBABLE CAUSES
- Malfunction of the stop lamp switch.
- Damaged harness or connector.
- Malfunction of the engine-A/T-ECU.
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STEP 1. MUT-II/III data list
Item 05: Stop lamp switch (Refer to data list reference table  ).
Q: Is the check result normal?
YES:
Go to Step 14  .
NO:
Go to Step 2 .
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STEP 2. Check the stop lamp operation.
Check the stop lamp operation.
OK:
- Brake pedal depressed: Stop lamp will illuminate
- Brake pedal not depressed: Stop lamp does not illuminate
Q: Is the check result normal?
YES:
Go to Step 3 .
NO:
Go to Step 6 .
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STEP 3. Measure the voltage at engine-A/T-ECU connector C-135. - Turn the ignition switch to the "ON" position.
- Measure the voltage between engine-A/T-ECU connector C-135 terminal No.39 and earth.
OK:
- Brake pedal depressed: System voltage
- Brake pedal not depressed: 1 V or less
- Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the check result normal?
YES:
Go to Step 13 .
NO:
Go to Step 4 .
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STEP 4. Connectors check: C-135 engine-A/T-ECU connector, C-16 J/C
(1), C-104 intermediate connector Q: Is the check result normal?
YES:
Go to Step 5 .
NO:
Repair or replace the damaged components. Then go to Step 23 .
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STEP 5. Check the harness between engine-A/T-ECU connector C-135 terminal
No.39 and stop lamp switch connector C-101 terminal No.1. Q: Is the check result normal?
YES:
Go to Step 13 .
NO:
Repair the damaged harness wire. Then go to Step 23 .
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STEP 6. Measure the voltage at stop lamp switch connector C-101. - Disconnect stop lamp switch connector C-101.
- Measure the voltage between stop lamp switch connector C-101 terminal No.2 and
earth.
OK: System voltage
- Connect stop lamp switch connector C-101.
Q: Is the check result normal?
YES:
Go to Step 10 .
NO:
Go to Step 7 .
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STEP 7. Connectors check: C-101 stop lamp switch connector, C-116 intermediate
connector Q: Is the check result normal?
YES:
Go to Step 8 .
NO:
Repair or replace the damaged components. Then go to Step 23 .
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STEP 8. Check the harness between stop lamp switch connector C-101 terminal
No.2 and fuse No.11 at the relay box in engine compartment for damage. Q: Is the check result normal?
YES:
Go to Step 9 .
NO:
Repair the damaged harness wire. Then go to Step 23 .
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STEP 9. Check the fuse No.11 at the relay box in engine compartment. Q: Is the check result normal?
YES:
Go to Step 10 .
NO:
Check the stop lamp system harness and replace the fuse. Then go to Step 23 .
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STEP 10. Check the stop lamp switch.
Refer to .
Q: Is the check result normal?
YES:
Install the stop lamp switch (Refer to GROUP 35A, Brake Pedal ). Then
go to Step 11 .
NO:
Replace the stop lamp switch (Refer to GROUP 35A, Brake Pedal ). Then
go to Step 23 .
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STEP 11. Connectors check: C-101 stop lamp switch connector, C-104 intermediate
connector, C-16 J/C (1), C-135 engine-A/T-ECU connector Q: Is the check result normal?
YES:
Go to Step 12 .
NO:
Repair or replace the damaged components. Then go to Step 23 .
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STEP 12. Check the harness between stop lamp switch connector C-127 terminal
No.1 and engine-A/T-ECU connector C-135 terminal No.39. Q: Is the check result normal?
YES:
Go to Step 13 .
NO:
Repair the damaged harness wire. Then go to Step 23 .
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STEP 13. MUT-II/III data list
Item 05: Stop lamp switch (Refer to data list reference table ).
Q: Is the check result normal?
YES:
Go to Step 22 .
NO:
Replace the engine-A/T-ECU (Refer to GROUP 13C, Engine-A/T-ECU ).
Then go to Step 23 .
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STEP 14. MUT-II/III data list
Item 06: Brake switch (Refer to data list reference table ).
Q: Is the check result normal?
YES:
Go to Step 22 .
NO:
Go to Step 15 .
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STEP 15. Measure the voltage at engine-A/T-ECU connector C-135. - Turn the ignition switch to the "ON" position.
- Measure the voltage between engine-A/T-ECU connector C-135 terminal No.54 and earth.
OK:
- Brake pedal depressed: System voltage
- Brake pedal not depressed: 1 V or less
- Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the check result normal?
YES:
Go to Step 21 .
NO:
Go to Step 16 .
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STEP 16. Check the stop lamp switch.
Refer to .
Q: Is the check result normal?
YES:
Install the stop lamp switch (Refer to GROUP 35A, Brake Pedal ). Then
go to Step 17 .
NO:
Replace the stop lamp switch (Refer to GROUP 35A, Brake Pedal ). Then
go to Step 23 .
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STEP 17. Connectors check: C-135 engine-A/T-ECU connector, C-105 intermediate
connector <L.H. drive vehicles>
or C-106 intermediate connector <R.H.
drive vehicles>, C-101 stop lamp switch connector Q: Is the check result normal?
YES:
Go to Step 18 .
NO:
Repair or replace the damaged components. Then go to Step 23 .
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STEP 18. Check the harness between engine-A/T-ECU connector C-135 terminal
No.54 and stop lamp switch connector C-101 terminal No.3. Q: Is the check result normal?
YES:
Go to Step 19 .
NO:
Repair the damaged harness wire. Then go to Step 23 .
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STEP 19. Connectors check: C-101 stop lamp switch connector, C-14 intermediate
connector <R.H. drive vehicles only> Q: Is the check result normal?
YES:
Go to Step 20 .
NO:
Repair or replace the damaged components. Then go to Step 23 .
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STEP 20. Check the harness between stop lamp switch connector C-101 terminal
No.4 and earth. Q: Is the check result normal?
YES:
Go to Step 21 .
NO:
Repair the damaged harness wire. Then go to Step 23 .
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STEP 21. MUT-II/III data list
Item 06: Brake switch (Refer to data list reference table ).
Q: Is the check result normal?
YES:
Go to Step 22 .
NO:
Replace the engine-A/T-ECU (Refer to GROUP 13C, Engine-A/T-ECU ).
Then go to Step 23 .
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STEP 22. Check the MUT-II/III diagnosis code No.22. Q: Is the MUT-II/III diagnosis code No.22 set?
YES:
Replace the engine-A/T-ECU (Refer to GROUP 13C, Engine-A/T-ECU ).
Then go to Step 23 .
NO:
It can be assumed that this malfunction is intermittent.
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STEP 23. Check the MUT-II/III diagnosis code No.22. Q: Is the MUT-II/III diagnosis code No.22 set?
YES:
Return to Step 1 .
NO:
The procedure is complete.
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