Inspection Procedure

INSPECT DLC3
1. Turn the ignition switch to ON.
2. Measure voltage between terminals TC and CG of DLC3.
  Voltage: 10 to 14 V
Fig 1: Identifying DLC3 Connector Terminal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to step 3

NG: GO TO NEXT STEP
CHECK HARNESS AND CONNECTOR (DLC3 - BODY GROUND)
1. Check for an open circuit in harness and connector between terminal CG of DLC3 and body ground (See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS ).
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO NEXT STEP
CHECK HARNESS AND CONNECTOR (DLC3 - ECM)
1. Check for an open or short circuit in harness and connector between terminal TC of DLC3 and ECM (See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS ).
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE ECM