DTC P0504:00 [MZR-CD (RF Turbo)]

id0102f1155600

DTC P0504:00

Brake switch circuit problem
DETECTION CONDITION
•  The PCM monitors changes in input voltage for brake switch No.1 and No.2 (signal from instrument cluster). If the PCM detects that both brake switches No.1 and No.2 remain on or off for 15 s, it determines that the brake switch circuit has a malfunction.
Diagnostic support note
•  This is a continuous monitor.
•  The MIL does not illuminate.
•  FREEZE FRAME DATA is not available.
•  DTC is stored in PCM memory.
POSSIBLE CAUSE
•  Brake switch malfunction
•  Open circuit between brake switch terminal C and PCM terminal 101
•  Open circuit between brake switch terminal B and body ground
•  Short to power between brake switch terminal C and PCM terminal 101
•  Short to ground circuit between brake switch terminal C and PCM terminal 101
•  PCM malfunction

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 FREEZE FRAME DATA on repair, then go to the next step.
2
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.
3
INSPECT BRAKE SWITCH CONNECTOR FOR POOR CONNECTION
•  Switch the ignition to off.
•  Disconnect the brake switch connector.
•  Inspect for poor connection (such as damaged, pull-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 10.
No
Go to the next step.
4
INSPECT BRAKE SWITCH
•  Inspect the brake switch.
•  Is the brake switch normal?
Yes
Go to the next step.
No
Replace the brake switch, then go to Step 10.
5
INSPECT GROUND CIRCUIT OF BRAKE SWITCH NO.2 FOR OPEN CIRCUIT
•  Inspect for continuity between brake switch terminal B and body ground.
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for open circuit, then go to Step 10.
6
INSPECT SIGNAL CIRCUIT OF BRAKE SWITCH NO.2 FOR SHORT TO GROUND
•  Inspect for continuity between brake switch terminal C and body ground.
•  Is there continuity?
Yes
Repair or replace the wiring harness for short to ground circuit, then go to Step 10.
No
Go to the next step.
7
INSPECT INSTRUMENT CLUSTER CONNECTOR FOR POOR CONNECTION
•  Switch the ignition to off.
•  Disconnect instrument cluster connector.
•  Inspect for poor connection (such as damaged, pull-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 10.
No
Go to the next step.
8
INSPECT SIGNAL CIRCUIT OF BRAKE SWITCH NO.2 FOR OPEN CIRCUIT
•  Inspect for continuity between brake switch terminal C and instrument cluster terminal 101.
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for open circuit, then go to Step 10.
9
INSPECT SIGNAL CIRCUIT OF BRAKE SWITCH NO.2 FOR SHORT TO POWER
•  Switch the ignition to ON (Engine off).
•  Measure the voltage between brake switch terminal C and body ground.
•  Is the voltage B+?
Yes
Repair or replace the wiring harness for short to power circuit, then go to the next step.
No
Go to the next step.
10
VERIFY TROUBLESHOOTING OF P0504:00 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 more than 5 times.
•  Is the same DTC present?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
No
Go to the next step.
11
VERIFY AFTER REPAIR PROCEDURE
•  Perform “AFTER REPAIR PROCEDURE”.
•  Is any DTC present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZR-CD (RF Turbo)].)
No
Troubleshooting completed.