Inspection Procedure

READ VALUE OF INTELLIGENT TESTER

Connect the intelligent tester to the DLC3.
Turn the ignition switch on (IG), and turn the intelligent tester main switch on.
According to the display on the tester, read the "DATA LIST".

CC (ECM):

DATA LIST

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
DISTANCE TIME	Car distance time setting condition /SHRT, MID, LONG, NO	Distance selected by distance control switch	-

OK:

Distance selected by the distance control switch is shown on the display.

NG: Go to step 2

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

INSPECT STEERING PAD SWITCH ASSEMBLY

Remove the steering pad switch assembly.

Measure the resistance between terminals 4 (DIST) and 6 (ECC) of the steering pad switch assembly connector when the distance control switch is operated.

Standard resistance

RESISTANCE SPECIFICATION

Switch Position	Specified Condition
Distance control switch is ON	Below 2.5 Ω
Distance control switch is OFF	100 kΩ or higher

HINT:

When a malfunction is detected in the distance control switch, replace the steering pad switch assembly.

Fig 1: Identifying Steering Pad Switch Assembly Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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 prevent the airbag from deploying. Be sure to read the article shown in the brackets.

HINT:

See REMOVAL
See INSTALLATION

Remove the spiral cable.

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

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Spiral Cable Position	Specified Condition
A-4 - D15-11	Center	Below 1 Ω
	2.5 rotations to the left
	2.5 rotations to the right
A-6 - D15-2	Center	Below 1 Ω
	2.5 rotations to the left
	2.5 rotations to the right

HINT:

The spiral cable makes a maximum of approximately 5 rotations.

Fig 2: Identifying D15 Spiral Cable Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE STEERING PAD SWITCH ASSEMBLY

OK: Go to Next Step

CHECK WIRE HARNESS (DISTANCE CONTROL ECU - SPIRAL CABLE)

Disconnect the distance control ECU connector.

Fig 3: Disconnecting Distance Control ECU Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
D15-11 - A20-16 (MODE)	Always	Below 1 Ω
A20-16 (MODE) - Body ground	Always	10 kΩ or higher

NG: REPLACE SPIRAL CABLE

OK: Go to Next Step

CHECK WIRE HARNESS (SPIRAL CABLE - BODY GROUND)

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

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
D15-2 - Body ground	Always	Below 1 Ω

Fig 4: Identifying Spiral Cable Connector Terminals

NG: REPLACE SPIRAL CABLE

OK: Go to Next Step

INSPECT DISTANCE CONTROL ECU

Remove the distance control ECU (cruise control ECU) with the connector.

Fig 5: Identifying Distance Control ECU Connector

Turn the ignition switch on (IG).

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

Standard voltage

VOLTAGE SPECIFICATION

Tester Connection	Condition	Specified Condition
A20-16 (MODE) - Body ground	Distance control switch ON	0 to 2V
A20-16 (MODE) - Body ground	Distance control switch OFF	9 to 16 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

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