Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: When the distance control ECU is replaced with a new one, initialization must be performed (see INSTALLATION ).

INSPECT STEERING PAD SWITCH ASSEMBLY

Remove the steering pad (See STEERING PAD ).
Disconnect the k1 connector from the spiral cable.

Fig 1: Identifying Distance Control Switch
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Switch Condition	Specified Condition
k1-4 (DIST) - k1-6 (ECC)	Distance control switch ON	Below 2.5 Ω
k1-4 (DIST) - k1-6 (ECC)	Distance control switch OFF	10 kΩ or higher

NG: REPLACE STEERING PAD SWITCH ASSEMBLY (See STEERING PAD SWITCH )

OK: Go to next step

INSPECT SPIRAL CABLE

NOTE: The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may cause airbag deployment. Be sure to read the article shown in the brackets.

HINT.

Removal (See REMOVAL )
Installation (See INSTALLATION )

Remove the spiral cable (See SPIRAL CABLE ).

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
k1-4 (DIST) - J24-11 (DIST)	The spiral cable position is center	Below 1 Ω
	The spiral cable position is 2.5 rotations to the left
	The spiral cable position is 2.5 rotations to the right
k1-6 (ECC) - J24-2 (ECC)	The spiral cable position is center	Below 1 Ω
	The spiral cable position is 2 5 rotations to the left
	The spiral cable position is 2.5 rotations to the right

HINT:

The spiral cable makes a maximum of approximately 5 rotations.

Fig 2: Identifying Terminals Of Spiral Cable Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE SPIRAL CABLE (See SPIRAL CABLE )

OK: Go to next step

CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - DISTANCE CONTROL ECU, BODY GROUND)

Disconnect the distance control ECU connector

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
J24-11 (DIST) - J17-16 (MODE)	Always	Below 1 Ω
J24-11 (DIST) - Body ground	Always	10 kΩ or higher
J24-2 (ECC) - Body ground	Always	Below 1 Ω

Fig 3: Identifying Terminals Of Distance Control ECU Connector

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

INSPECT DISTANCE CONTROL ECU

Reconnect the distance control ECU connector.
Turn the engine switch on (IG).

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

Standard Voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Switch Condition	Specified Condition
J17-16 (MODE) - Body ground	Distance control switch ON	0 to 2 V
J17-16 (MODE) - Body ground	Distance control switch OFF	11 to 14 V

Fig 4: Identifying Terminals Of Distance Control ECU Connector

NG: REPLACE DISTANCE CONTROL ECU (See DISTANCE CONTROL ECU )

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )