Inspection Procedure

WARNING: This page is about a different car, the 2007 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.
  Standard voltage:
  
  9 to 14 V
OK: REPLACE SUSPENSION CONTROL ECU

Fig 1: Measuring Voltage Between Terminals 13 (TC) & 4 (CG) Of DLC3
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

OK: REPLACE SUSPENSION CONTROL ECU