Inspection Procedure

WARNING: This page is about a different car, the 2006 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DLC3 (TC VOLTAGE)
1. Turn the ignition switch ON.
2. Measure the voltage between terminals 13 (TC) and 4 (CG) of the DLC3.
  OK:
  
  Standard voltage: 10 to 14 V
OK: CHECK ABS AND VSC TRAC WARNING LIGHT

Fig 1: Identifying DLC3 Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: GO TO NEXT STEP
CHECK WIRE HARNESS (DLC3 - SKID CONTROL ECU)
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: REPLACE SKID CONTROL ECU ASSEMBLY