GSIC - Global Service Information Center

### DTC P0504/51 Brake Switch "A" / "B" Correlation

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

When using intelligent tester:

CHECK STOP LIGHT (OPERATION)

READ DATA LIST (STP SIGNAL, ST1- VOLTAGE)

INSPECT STOP LIGHT SWITCH ASSEMBLY

CHECK ECM (STOP LIGHT SWITCH - ECM)

When not using intelligent tester:

CHECK STOP LIGHT (OPERATION)

CHECK ECM (STP, ST1- VOLTAGE)

INSPECT STOP LIGHT SWITCH ASSEMBLY

CHECK ECM (STOP LIGHT SWITCH - ECM)