Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota Tacoma. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

When a particular warning light blinks continuously, a ground short in the wiring of terminal TC of the DLC3 or an internal ground short in the relevant ECU is suspected.

CHECK HARNESS AND CONNECTOR (TC of DLC3 - ECM)

Turn the ignition switch off.
1GR-FE:
Disconnect the E8 connector of the ECM.
2TR-FE:
Disconnect the E7 connector of the ECM.

Measure the resistance according to the value(s) in TESTER CONNECTION SPECIFIED CONDITION .

Standard Resistance (1GR-FE)

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specification
TC (D4-13) - TC (E8-23)	Always	Below 1 Ω

Standard Resistance (2TR-FE)

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specification
TC (D4-13) - TC (E7-17)	Always	Below 1 Ω

Reconnect the ECM connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (TC of DLC3 - ECM)

Fig 1: Disconnecting E8 Connector Of ECM

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step

CHECK HARNESS AND CONNECTOR (TC of DLC3 - BODY GROUND)

Measure the resistance according to the value(s) in TESTER CONNECTION SPECIFIED CONDITION .

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specification
TC (D4-13) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (TC CIRCUIT)

Fig 2: Identifying DLC3 Connector Terminals

OK: Go to next step

CHECK HARNESS AND CONNECTOR (CG of DLC3 - BODY GROUND)

Measure the resistance according to the value(s) in TESTER CONNECTION SPECIFIED CONDITION .

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specification
CG (D4-4) - Body ground	Always	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (CG of DLC3 - BODY GROUND)

Fig 3: Identifying DLC3 Connector Terminals

OK: REPLACE ECM