Inspection Procedure

NOTE: The vehicle is equipped with an SRS (Supplemental Restraint System) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the precautionary notice for the Supplemental Restraint System (See AIRBAG SYSTEM ).

CHECK ILLUMINATION

Check if the illumination for the multi-display, radio receiver, steering pad switch assembly, glove box, or others (seat heater switch, console box, etc.) comes on when the light control switch is turned to the HEAD or TAIL position.

Result

RESULT CHART

Condition	Proceed to
Illumination comes on for all components except steering pad switch.	A
Illumination comes on for all components except multi-display.	B
No illumination comes on (radio receiver, glove box, multi-display, etc.)	C
Illumination comes on only for glove box and steering pad switch.	D

B: Go to step 6

C: GO TO LIGHTING SYSTEM

D: Go to step 8

A: Go to Next Step

CHECK HARNESS AND CONNECTOR (BATTERY - SPIRAL CABLE)

Disconnect the spiral cable connector.

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Tester connection	Condition	Specified condition
IL+2 - Body ground	Light control SW TAIL or HEAD	10 to 14 V

Fig 1: Identifying C13 Spiral Cable Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

CHECK STEERING PAD SWITCH ASSEMBLY
1. Disconnect the steering pad switch assembly connector.
  
  Fig 2: Identifying Steering Pad Switch Assembly Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect the positive (+) lead to terminal IL+2 and the negative (-) lead to terminal EAU of the steering pad switch assembly connector.
3. Check if the illumination for the steering pad switch assembly comes on.
  OK: Illumination for the steering pad switch assembly comes on.
NG: REPLACE STEERING PAD SWITCH ASSEMBLY

OK: Go to Next Step

CHECK SPIRAL CABLE

Disconnect the steering pad switch assembly and spiral cable connectors.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Tester connection	Spiral cable position	Specified condition
EAU-EAU	Center	Below 1 Ω
	2.5 rotations to the left
	2.5 rotations to the right
IL+2 - IL+2	Center	Below 1 Ω
	2.5 rotations to the left
	2.5 rotations to the right

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 )

Fig 3: Identifying Spiral Cable Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE SPIRAL CABLE

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - RADIO RECEIVER)

Disconnect the radio receiver and spiral cable connectors.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Tester connection	Condition	Specified condition
SWG - EAU	Always	Below 1 Ω
SWG - Body ground	Always	10 kΩ or higher

Fig 4: Identifying Radio Receiver And Spiral Cable Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE RADIO RECEIVER

CHECK HARNESS AND CONNECTOR (BATTERY - MULTI-DISPLAY)

Disconnect the multi-display connector M5.

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Tester connection	Condition	Specified condition
ILL+ - Body ground	Light control switch TAIL or HEAD	10 to 14 V

Fig 5: Identifying M5 Multi-Display Connector Terminals

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY

Disconnect the multi-display and combination meter connectors.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Tester connection	Condition	Specified condition
ILL- - C8-2	Always	Below 1 Ω
HILL - C8-2	Always	Below 1 Ω
ILL- - Body ground	Always	10 kΩ or higher
HILL - Body ground	Always	10 kΩ or higher

Fig 6: Identifying Multi-Display And Combination Meter Connector Terminals

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

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

CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - COMBINATION METER)

Disconnect the multi-display and combination meter connectors.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

Tester connection	Condition	Specified condition
ILL- - C8-2	Always	Below 1 Ω
HILL - C8-2	Always	Below 1 Ω
ILL- - Body ground	Always	10 kΩ or higher
HILL - Body ground	Always	10 kΩ or higher

Fig 7: Identifying Multi-Display And Combination Meter Connector Terminals

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO COMBINATION METER