Last Modified: 7-3-2017 6.8:8.0.40 Doc ID: RM000001CU1004X
Model Year Start: 2007 Model: LX470 Prod Date Range: [08/2006 -           ]
Title: SUSPENSION CONTROL: ACTIVE HEIGHT CONTROL SUSPENSION: DIAGNOSIS SYSTEM; 2007 MY LX470 [08/2006 -        ]

DIAGNOSIS SYSTEM

1. DIAGNOSIS SYSTEM

(a) Check DLC3.

The suspension control ECU uses the CAN system and ISO 9141-2 for communication. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 9141-2 format.

Symbols (Terminal No.)

Terminal Description

Condition

Specified Condition

SIL (7) - SG (5)

Bus "+" line

During communication

Pulse generation

CG (4) - Body ground

Chassis ground

Always

Below 1 Ω

SG (5) - Body ground

Signal ground

Always

Below 1 Ω

BAT (16) - Body ground

Battery positive

Always

11 to 14 V

HINT:

If the intelligent tester display shown UNABLE TO CONNECT TO VEHICLE when the cable of the intelligent tester is connected to the DLC3, the ignition switch is turned ON and the tester is operated, there is a problem on the vehicle side or tester side.

  • If communication is normal when the tester is connected to another vehicle, inspect the DLC3 on the original vehicle.
  • If communication is still not possible when the tool is connected to another vehicle, the problem may be in the tester itself, so consult the service department listed in the tester's instruction manual.

(b) DTCs (Normal mode)

(1) DTCs are memorized in the suspension control ECU and read by using the SST check wire or the intelligent tester 2007 MY LX470 [08/2006 -        ]; SUSPENSION CONTROL: ACTIVE HEIGHT CONTROL SUSPENSION: DTC CHECK / CLEAR .

SST: 09843-18040

(c) Test mode (Input signal check)

(1) By switching from normal mode into test mode, you can inspect the height control switch, height control mode select switch, door courtesy light switch, and stop light switch 2007 MY LX470 [08/2006 -        ]; SUSPENSION CONTROL: ACTIVE HEIGHT CONTROL SUSPENSION: TEST MODE PROCEDURE .

(d) Check the indicator light.

(1) Turn the ignition switch ON.

(2) Check that height control indicator light and height control OFF indicator light come on for 2 seconds.

If the indicator does not light, inspect the height control OFF indicator light circuit 2007 MY LX470 [08/2006 -        ]; SUSPENSION CONTROL: ACTIVE HEIGHT CONTROL SUSPENSION: Height Control Indicator Light Circuit and height control indicator light circuit 2007 MY LX470 [08/2006 -        ]; SUSPENSION CONTROL: ACTIVE HEIGHT CONTROL SUSPENSION: Height Control OFF Indicator Light Circuit .