Home Engine/Hybrid System Cruise Control CRUISE CONTROL SYSTEM
Last Modified: 11-27-2007 1.6 J
Service Category: Engine/Hybrid System Section: Cruise Control
Model Year: 2008 Model: LX570 Doc ID: RM000002L7100AX
Title: CRUISE CONTROL: CRUISE CONTROL SYSTEM: DESCRIPTION (2008 LX570)

TC and CG Terminal Circuit

DESCRIPTION

Connecting terminals TC and CG of the DLC3 causes the system to enter self-diagnostic mode. If a malfunction is present, DTCs will be output.

HINT:

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

WIRING DIAGRAM



INSPECTION PROCEDURE

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (DLC3 - ECM AND BODY GROUND)



(a) Disconnect the A38 ECM connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

E22-13 (TC) - A38-16 (TC)

Always

Below 1 Ω

E22-4 (CG) - Body ground

E22-13 (TC) - Body ground

Always

10 kΩ or higher

OK