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Diagnostic Procedure

DTC P0571:00 DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1 VERIFY RELATED REPAIR INFORMATION AVAILABILITY
  • Verify related Service Bulletins and/or on-line 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.
2 VERIFY DTC FOR MODULE COMMUNICATION
 Yes Go to the applicable DTC inspection.
(See DTC U0073:00, U0101:00, U0121:00, U0155-00: .)
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. (See ON-BOARD DIAGNOSTIC TEST [MZR 2.5] .)
  • Is the PENDING CODE/DTC P0703:00 also present?
 Yes Go to the applicable PENDING CODE or DTC inspection.
(See DTC P0703-00: .)
No Go to the next step.
4 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 connector and/or terminals, then go to Step 13.
No Go to the next step.
5 INSPECT BRAKE SWITCH NO. 1 POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT
  • Verify that the brake switch connector is disconnected.
  • Measure the voltage at the brake switch terminal A (wiring harness-side).
  • Is the voltage B+?
 Yes Go to the next step.
No Inspect the STOP 10 A fuse.
  • If the fuse is blown:
    • Repair or replace the wiring harness for a possible short to ground.
      • Replace the fuse.
  • If the fuse is deteriorated:
    • Replace the fuse.
  • If the fuse is normal:
    • Repair or replace the wiring harness for a possible open circuit.

Go to Step 13.
6 INSPECT BRAKE SWITCH NO. 2 GROUND CIRCUIT FOR OPEN CIRCUIT
  • Verify that the 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 connector and/or terminals, then go to Step 13.
No Go to the next step.
8 INSPECT BRAKE SWITCH CIRCUIT FOR SHORT TO GROUND
  • Verify that the brake switch and instrument cluster connectors are disconnected.
  • Inspect for continuity between the following terminals (wiring harness-side) and body ground:
    • Brake switch terminal D
      • Brake switch terminal C
  • Is there continuity?
 Yes If the short to ground circuit could be detected:
  • Repair or replace the wiring harness for a possible short to ground.

    If the short to ground circuit could not be detected:

  • Replace the PCM (short to ground in the PCM internal circuit). (See PCM REMOVAL/INSTALLATION [MZR 2.5] .)

Go to Step 13.
No Go to the next step.
9 INSPECT PCM CONNECTOR CONDITION
  • Disconnect the PCM connector.
  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
  • Is there any malfunction?
 Yes Repair or replace the connector and/or terminals, then go to Step 13.
No Go to the next step.
10 INSPECT BRAKE SWITCH CIRCUIT FOR SHORT TO POWER SUPPLY
  • Verify that the brake switch, instrument cluster and PCM connectors are disconnected.
  • Switch the ignition to ON (engine off).
  • Measure the voltage at the following terminals (wiring harness-side):
    • Brake switch terminal D
      • Brake switch terminal C
  • 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 CIRCUIT FOR OPEN CIRCUIT
  • Verify that the brake switch, instrument cluster and PCM connectors are disconnected.
  • Switch the ignition to off.
  • Inspect for continuity between the following terminals (wiring harness-side):
    • Brake switch terminal D-PCM terminal 1AB
      • Brake switch terminal C
      • Instrument cluster terminal N
  • 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
 Yes Replace the brake switch, then go to the next step.
(See BRAKE PEDAL REMOVAL/INSTALLATION .)
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. (See AFTER REPAIR PROCEDURE [MZR 2.5] .)
  • Switch the ignition to ON (engine off).
  • Depress and release the brake pedal for 15 smore than 5 times.
  • Perform the DTC Reading Procedure. (See ON-BOARD DIAGNOSTIC TEST [MZR 2.5] .)
  • Is the same DTC present?
 Yes Repeat the inspection from Step 1.

Go to the next step.
No Go to the next step.
14 VERIFY AFTER REPAIR PROCEDURE
 Yes Go to the applicable DTC inspection.
(See DTC TABLE [MZR 2.5] .)
No DTC troubleshooting completed.
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