Diagnosis System

DIAGNOSIS SYSTEM

Inspect the battery voltage.
Battery voltage:

11 to 14 V

If the voltage is below 11 V, recharge the battery before proceeding.

Check DLC3.

The absorber control ECU uses the CAN system and ISO 9141-2 for communication. The terminal arrangement of the DCL3 complies with SAE J1962 and matches the ISO 9141-2 format. Verify the conditions listed in the table below:

Fig 1: Identifying DLC3 Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TERMINAL DESCRIPTION SPECIFICATION

Symbols (Terminal No.)	Terminal Description	Condition	Specified Condition
SIL (2) - 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
CANH (6) - CANL (14)	HIGH-level CAN bus line	Engine switch off	54 to 67 Ω
CANH (6) - Battery positive	HIGH-level CAN bus line	Engine switch off	1 MΩ. or higher
CANH (6) - CG (4)	HIGH-level CAN bus line	Engine switch off	3 KΩ or higher
CANL (14) - Battery positive	LOW-level CAN bus line	Engine switch off	1 MΩ or higher
CANL (14) - CG (4)	LOW-level CAN bus line	Engine switch off	3 KΩ or higher

HINT:

If the intelligent tester display shows a communication error message when the cable of the intelligent tester is connected to the DLC3, the engine switch is turned on (IG) and the tester is in operation, there is a problem either 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 is probably in the tester itself. Consult the service department listed in the tester's instruction manual.

DTCs (Normal mode)
1. DTCs are memorized in the absorber control ECU and read by using the intelligent tester (See DTC CHECK / CLEAR ).
Test Mode (SIGNAL CHECK)
1. By switching from normal mode into Test Mode, you can inspect the absorber control switch and each acceleration sensor (See TEST MODE PROCEDURE ).

Check the absorber control indicator light.

Turn the engine switch on (IG).

Check that the absorber control indicator light comes on for 2 seconds.

If the indicator light check result is not normal, proceed to troubleshooting for the absorber control indicator light circuit below.

TROUBLE AREAS REFERENCE

Trouble area	See procedure
Absorber control indicator light (Remains on)	ABSORBER CONTROL INDICATOR LIGHT REMAINS ON
Absorber control indicator light (Does not come on)	ABSORBER CONTROL INDICATOR LIGHT DOES NOT COME ON

Fig 2: Checking Absorber Control Indicator Light