Inspection Procedure

NOTE: When the distance control ECU and/or ECM are 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

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
A8-16 (MODE) - Body ground	Distance control switch ON (pushed)	0 to 2 V
A8-16 (MODE) - Body ground	Distance control switch OFF (not pushed)	10 to 14 V

Fig 1: Identifying A8 Connector Terminals

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

NG: Go to Next Step

INSPECT DISTANCE CONTROL ECU CIRCUIT

Disconnect the A8 connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specified condition
A8-16 (MODE)-Body ground	Distance control switch ON (pushed)	Below 1 Ω
A8-16 (MODE)-Body ground	Distance control switch OFF (not pushed)	10 kΩ or higher

Fig 2: Disconnecting A8 Connector

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OK REPLACE DISTANCE CONTROL ECU (See REMOVAL )

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 the d1 connector from the spiral cable.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
d1-4 (DIST) - d1-6 (ECC)	Distance control switch ON (pushed)	Below 2.5 Ω
d1-4 (DIST) - d1-6 (ECC)	Distance control switch OFF (not pushed)	10 kΩ or higher

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

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (ECM - 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 page shown in the brackets.

HINT:

(See REMOVAL )
(See INSTALLATION )

Remove the spiral cable.
Disconnect the A8 connector from the distance control ECU.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
E30-11 (DIST) - A8-16 (MODE)	Always	Below 1 Ω
A8-16 (MODE) - Body ground	Distance control switch off	10 kΩ or higher
A8-16 (MODE) - Body ground	Distance control switch on	Below 1 Ω

Fig 4: Identifying A8 And E30 Connectors Terminals

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE SPIRAL CABLE (See REMOVAL )