P0504

DTC P0504

DTC Detecting Condition and Trouble Area






Circuit Diagram










DTC Confirmation Procedure

1) Push engine switch to change ignition mode to "ON".
2) Keep brake pedal at depressed position for 3 sec.

DTC Troubleshooting


1. Was "Engine and Emission Control System Check" performed?
YES
Go to Step 2.
NO
Go to Engine and Emission Control System Check Engine and Emission Control System Check.
2. Brake light switch check
Check brake light switch. Brake Light Switch Inspection
Is it in good condition?
YES
Go to Step 3.
NO
Replace brake light switch.
3. Brake light switch power supply circuit check
Confirm that ignition mode of keyless push start system is in "OFF".
Disconnect brake light switch connector.
Check for proper terminal connection to brake light switch connector.
If connections are OK, check that voltage between each of "A1" and "A2" circuits and ground is battery voltage with ignition mode of keyless push start system in "ON".
Are they in good condition?
YES
Go to Step 4.
NO
Repair or replace defective wire harness.
4. Brake light switch signal circuit check
Push engine switch to change ignition mode to "OFF".
Disconnect "C01" and "E01" connectors.
Check for proper terminal connection to "C01" and "E01" connectors.
If connections are OK, check that brake light switch signal circuit (B1 and B2) is as follows.
Resistance of "B1" and "B2" circuits: less than 1
Resistance between each of "B1" and "B2" circuits and ground: infinity
Resistance between "B1" circuit terminal and other terminal at brake light switch connector: infinity
Resistance between "B2" circuit terminal and other terminal at brake light switch connector: infinity
Are they in good condition?
YES
Replace ECM and recheck DTC. Service and Repair
NO
Repair or replace defective wire harness.