Diagnostic Aids

BCM detects that ignition is ON and send appropriate power mode message to other modules. BCM must be connected to DLC for any other module to communicate with scan tool. When class 2 serial data circuit is shorted to ground, DTC U1300 or U1305 will be set. If DTC U1300 or U1305 exist, go to DTC U1300: CLASS 2 DATA LINK SHORTED TO GROUND  . When class 2 serial data circuit is shorted to power, DTC U1301 or U1305 will be set. If DTC U1301 or U1305 exists, go to DTC U1301: CLASS 2 DATA LINK SHORTED TO POWER  .