DTC P0571:00 [MZR 2.0 DISI i-stop]

id0102d4705500

DTC P0571:00

Brake switch circuit problem
DETECTION CONDITION
•  The PCM monitors switching in conjunction with brake switches No.1 and No.2. If either No.1 or No.2 do not switch for a continuous five times even though either No.1 or No.2 is switched from off to on or from on to off, P0571:00 is detected.
Diagnostic support note
•  This is a continuous monitor (other).
•  The MIL does not illuminate.
•  FREEZE FRAME DATA (Mode 2)/Snapshot data is not available.
•  The DTC is stored in the PCM memory.
POSSIBLE CAUSE
Caution
•  Inspect the brake switch with it installed to the brake pedal, otherwise the brake switch may not operate normally. If the brake switch is removed from the brake pedal, replace the brake switch with a new one.
•  Communication error between instrument cluster and PCM
•  Keyless control module malfunction (vehicles with advanced keyless entry and push button start system)
•  Brake switch connector or terminals malfunction
•  Open circuit in wiring harness between brake switch terminal B and body ground
•  Instrument cluster connector or terminals malfunction
•  Keyless control module connector or terminals malfunction (vehicles with advanced keyless entry and push button start system)
•  Short to ground in wiring harness between the following terminals:
―  Brake switch terminal C—Instrument cluster terminal 2N
―  Brake switch terminal C—Keyless control module terminal 4W (vehicles with advanced keyless entry and push button start system)
•  Short to power supply in wiring harness between the following terminals:
―  Brake switch terminal C—Instrument cluster terminal 2N
―  Brake switch terminal C—Keyless control module terminal 4W (vehicles with advanced keyless entry and push button start system)
•  Open circuit in wiring harness between the following terminals:
―  Brake switch terminal C—Instrument cluster terminal 2N
―  Brake switch terminal C—Keyless control module terminal 4W (vehicles with advanced keyless entry and push button start system)
•  Brake switch malfunction
•  Instrument cluster malfunction
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform repair or diagnosis according to the available Service Information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
2
VERIFY DTC FOR MODULE COMMUNICATION
•  Switch the ignition to off, then to ON (engine off).
•  Perform the DTC Reading Procedure.
•  Is the DTC U0155:00 also present?
Yes
Go to the applicable DTC inspection.
(See FOREWORD [MULTIPLEX COMMUNICATION SYSTEM (L.H.D. (MZR-CD 2.2, MZR 2.0 DISI i-stop))].)
(See FOREWORD [MULTIPLEX COMMUNICATION SYSTEM (R.H.D. (MZR-CD 2.2, MZR 2.0 DISI i-stop))].)
No
Go to the next step.
3
VERIFY RELATED PENDING CODE AND/OR DTC
•  Switch the ignition to off, then to ON (engine off).
•  Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.
•  Is the PENDING CODE/DTC P0703:00 also present?
Yes
Go to the applicable PENDING CODE or DTC inspection.
(See DTC P0703:00 [MZR 2.0 DISI i-stop].)
No
Vehicles without advanced keyless entry and push button start system:
•  Go to Step 5.
Vehicles with advanced keyless entry and push button start system:
•  Go to the next step.
4
VERIFY DTC FOR KEYLESS CONTROL MODULE
•  Switch the ignition to off, then to ON (engine off).
•  Press the brake pedal few times.
•  Retrieve the keyless control module DTC using the M-MDS.
•  Is the DTC C0040:92 present?
Yes
Go to the applicable DTC inspection.
(See DTC C0040:29 [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].)
No
Go to the next step.
5
INSPECT BRAKE SWITCH CONNECTOR CONDITION
•  Switch the ignition to 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 and/or connector, then go to Step 13.
No
Go to the next step.
6
INSPECT BRAKE SWITCH GROUND CIRCUIT FOR OPEN CIRCUIT
•  Brake switch connector is disconnected.
•  Inspect for continuity between brake switch terminal B (wiring harness-side) and body ground.
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit, then go to Step 13.
7
INSPECT INSTRUMENT CLUSTER CONNECTOR CONDITION
•  Disconnect the instrument cluster connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the terminal and/or connector, then go to Step 13.
No
Vehicles without advanced keyless entry and push button start system:
•  Go to Step 9.
Vehicles with advanced keyless entry and push button start system:
•  Go to the next step.
8
INSPECT KEYLESS CONTROL MODULE CONNECTOR CONDITION
•  Disconnect the keyless control module connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the terminal and/or connector, then go to Step 13.
No
Go to the next step.
9
INSPECT BRAKE SWITCH SIGNAL CIRCUIT FOR SHORT TO GROUND
•  Brake switch and instrument cluster connectors are disconnected.
•  Keyless control module connector is disconnected (vehicles with advanced keyless entry and push button start system).
•  Inspect for continuity between brake switch terminal C (wiring harness-side) and body ground.
•  Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to ground, then go to Step 13.
No
Go to the next step.
10
INSPECT BRAKE SWITCH SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY
•  Brake switch and instrument cluster connectors are disconnected.
•  Keyless control module connector is disconnected (vehicles with advanced keyless entry and push button start system).
•  Switch the ignition to ON (engine off).
•  Measure the voltage at the brake switch terminal C (wiring harness-side).
•  Is there any voltage?
Yes
Repair or replace the wiring harness for a possible short to power supply, then go to Step 13.
No
Go to the next step.
11
INSPECT BRAKE SWITCH SIGNAL CIRCUIT FOR OPEN CIRCUIT
•  Brake switch and instrument cluster connectors are disconnected.
•  Keyless control module connector is disconnected (vehicles with advanced keyless entry and push button start system).
•  Switch the ignition to off.
•  Inspect for continuity between the following terminals (wiring harness-side):
―  Brake switch terminal C—Instrument cluster terminal 2N
―  Brake switch terminal C—Keyless control module terminal 4W (vehicles with advanced keyless entry and push button start system)
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit, then go to Step 13.
12
INSPECT BRAKE SWITCH
•  Inspect the brake switch.
•  Is there any malfunction?
Yes
Replace the brake switch, then go to the next step.
(See BRAKE PEDAL REMOVAL/INSTALLATION [L.H.D.].)
(See BRAKE PEDAL REMOVAL/INSTALLATION [R.H.D.].)
No
Replace the instrument cluster, then go to the next step.
(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
13
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Switch the ignition to ON (engine off).
•  Depress and release the brake pedal for 15 smore than 5 times.
•  Perform the DTC Reading Procedure.
•  Is the same DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the PCM.
Go to the next step.
No
Go to the next step.
14
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZR 2.0 DISI i-stop].)
No
DTC troubleshooting completed.