Inspection Procedure

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

INSPECT DISTANCE CONTROL ECU

Turn the engine switch on (IG).

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

Standard voltage

VOLTAGE SPECIFICATION CHART

Tester Connection	Condition	Specified Condition
J17-16 (MODE) - Body ground	Distance control switch ON (pushed)	0 to 2 V
J17-16 (MODE) - Body ground	Distance control switch OFF (pushed)	10 to 14 V

Fig 1: Identifying Distance Control ECU Connector J17

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

NG: Go to Next Step

INSPECT DISTANCE CONTROL ECU CIRCUIT

Disconnect the J17 connector.

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

Standard resistance

RESISTANCE SPECIFICATION CHART

Tester connection	Condition	Specified condition
J17-16 (MODE) - Body ground	Distance control switch ON (pushed)	Below 1 Ω
J17-16 (MODE) - Body ground	Distance control switch OFF (pushed)	10 kΩ or higher

Fig 2: Identifying Distance Control ECU Connector J17

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE DISTANCE CONTROL ECU

NG: Go to Next Step

INSPECT STEERING PAD SWITCH ASSEMBLY

Remove the steering pad (See REMOVAL ).

Fig 3: Inspecting Steering Pad Switch Assembly
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect k1 connector from the spiral cable.

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

Standard resistance

RESISTANCE SPECIFICATION CHART

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

NG: REPLACE STEERING PAD SWITCH ASSEMBLY

OK: Go to Next Step

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

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

HINT:

Removal (See REMOVAL )
Installation (See INSTALLATION )

Remove the spiral cable.
Disconnect the J17 connector from the distance control ECU.

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

Standard resistance

RESISTANCE SPECIFICATION CHART

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

Fig 4: Identifying Distance Control ECU Connector J17 And Spiral Cable Connector J24

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE SPIRAL CABLE