Inspection Procedure

WARNING: This page is about a different car, the 2005 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT DLC3 (TC TERMINAL VOLTAGE)

Turn the ignition switch to ON.
Measure voltage between terminals TC and CG of DLC3.

Standard:

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
Terminal 13 (TC) - Terminal 4 (CG)	10 to 14V

Fig 1: Inspecting DLC3

NG: Go to step 3
OK: Go to Next step

CHECK HARNESS AND CONNECTOR (DLC3 - ECM)
1. Check for open or short circuit in harness and connector between terminal TC of DLC3 and body ground (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
Fig 2: Checking For Open Or Short Circuit In Harness & Connector Between Terminal TC Of DLC3
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. OK: REPLACE ECM (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE )
CHECK HARNESS AND CONNECTOR (DLC3 - BODY GROUND)
1. Check for open circuit in harness and connector between terminal CG of DLC3 and body ground (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
Fig 3: Checking For Open Circuit In Harness & Connector Between Terminal CG Of DLC3 & Body Ground
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (DLC3 - ECM)
1. Check for open or short circuit in harness and connector between terminal TC of DLC3 and ECM (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).
Fig 4: Checking Harness & Connector (DLC3 & ECM)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. OK: REPLACE ECM (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE )