Distance Control Switch Circuit: Procedure

INSPECT DISTANCE CONTROL ECU

Turn the engine switch on (IG).

Fig 1: Locating Distance Control ECU
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard voltage

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

OK → PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG: Go to next step

INSPECT DISTANCE CONTROL ECU CIRCUIT

Disconnect the A8 connector.

Fig 2: View Of A8 Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard resistance

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

OK → See step 7

NG: Go to next step

INSPECT STEERING PAD SWITCH ASSEMBLY

Remove the steering pad . Refer to REMOVAL .

Fig 3: Identifying D1 Connector And Spiral Cable
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	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 → See step 5

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:

Removal . Refer to REMOVAL
Installation . Refer to INSTALLATION

Remove the spiral cable.

Fig 4: Identifying A8 And E30 Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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	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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK → See step 6

REPLACE STEERING PAD SWITCH. Refer to REMOVAL
REPLACE SPIRAL CABLE. Refer to REMOVAL
REPLACE DISTANCE CONTROL ECU. Refer to REMOVAL