Diagnostic procedure
|
STEP
|
INSPECTION
|
ACTION
|
|
|---|---|---|---|
|
1
|
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has FREEZE FRAME DATA been recorded?
|
Yes
|
Go to the next step.
|
|
No
|
Record the FREEZE FRAME DATA on the repair order, then go to the next step.
|
||
|
2
|
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
• Verify related service repair information availability.
• Is any related repair information available?
|
Yes
|
Perform repair or diagnosis according to the available repair information.
• If the vehicle is not repaired, go to the next step.
|
|
No
|
Go to the next step.
|
||
|
3
|
VERIFY RELATED PENDING CODE OR STORED DTC
• Turn the ignition switch off, then to the ON position (Engine off).
• Verify the related PENDING CODE or stored DTCs.
• Are other DTCs present?
|
Yes
|
Go to the appropriate DTC inspection.
(See DTC TABLE.)
|
|
No
|
Go to the next step.
|
||
|
4
|
INSPECT BRAKE SWITCH CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch off.
• Disconnect the brake switch connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is there any malfunction?
|
Yes
|
Repair or replace the terminal, then go to Step 11.
|
|
No
|
Go to the next step.
|
||
|
5
|
INSPECT BRAKE SWITCH NO.1 POWER CIRCUIT FOR OPEN CIRCUIT OR SHORT TO GND
• Turn the ignition switch to the ON position (Engine off).
• Measure the voltage between brake switch terminal B (wiring harness-side) and body GND.
• Is the voltage B+?
|
Yes
|
Go to the next step.
|
|
No
|
Repair or replace the wiring harness for a possible open circuit or short to GND, then go to Step 11.
|
||
|
6
|
INSPECT BRAKE SWITCH NO.1 SIGNAL CIRCUIT FOR SHORT TO GND
• Turn the ignition switch off.
• Inspect for continuity between brake switch terminal D (wiring harness-side) and body GND.
• Is there continuity?
|
Yes
|
Repair or replace the wiring harness for a possible short to GND, then go to Step 11.
|
|
No
|
Go to the next step.
|
||
|
7
|
INSPECT BRAKE SWITCH NO.1 SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY
• Turn the ignition switch to the ON position (Engine off).
• Measure the voltage between brake switch terminal D (wiring harness-side) and body GND.
• Is the voltage B+?
|
Yes
|
Repair or replace the wiring harness for a possible short to power supply, then go to Step 11.
|
|
No
|
Go to the next step.
|
||
|
8
|
INSPECT BRAKE SWITCH NO.1
• Inspect the brake switch No.1.
(See BRAKE SWITCH INSPECTION.)
• Is there any malfunction?
|
Yes
|
Replace the brake switch, then go to Step 11.
|
|
No
|
Go to the next step.
|
||
|
9
|
INSPECT DSC HU/CM CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch off.
• Disconnect the DSC HU/CM connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is there any malfunction?
|
Yes
|
Repair or replace the terminal, then go to Step 11.
|
|
No
|
Go to the next step.
|
||
|
10
|
INSPECT BRAKE SWITCH NO.1 SIGNAL CIRCUIT FOR OPEN CIRCUIT
• Turn the ignition switch off.
• Inspect for continuity between brake switch terminal D (wiring harness-side) and DSC HU/CM terminal AD (wiring harness-side).
• Is there continuity?
|
Yes
|
Go to the next step.
|
|
No
|
Repair or replace the wiring harness for a possible open circuit, then go to the next step.
|
||
|
11
|
VERIFY TROUBLESHOOTING OF DTC P0571 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Start the engine.
• Operate the brake pedal.
• Is the same DTC present?
|
Yes
|
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION.)
|
|
No
|
Go to the next step.
|
||
|
12
|
VERIFY AFTER REPAIR PROCEDURE
• Perform the "AFTER REPAIR PROCEDURE".
(See AFTER REPAIR PROCEDURE.)
• Are any DTCs present?
|
Yes
|
Go to the applicable DTC inspection.
(See DTC TABLE.)
|
|
No
|
DTC troubleshooting completed.
|
||
