Inspection Procedure

NOTE: The vehicle is equipped with an SRS (Supplemental Restraint System), 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 radio receiver, steering pad switch, cigarette lighter, glove box light or others (transmission control SW, etc.) comes on when the light control switch is turned to the HEAD or TAIL position.

Result

RESULT REFERENCE

Result	Proceed to
Illumination conies on for all components except steering pad switch.	A
Illumination comes on for all components except radio receiver.	B
No illumination comes on (radio receiver, steering pad switch, cigarette lighter, glove box light, transmission control switch).	C
No illumination comes on for all components except glove box light.	D

B: Go to step 6

C: GO TO LIGHTING SYSTEM

D: GO TO COMBINATION METER

A: Go to Next Step

CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - BATTERY)

Disconnect the spiral cable connector.

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

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

Fig 1: Identifying Spiral Cable Connector Terminals (D15) And (IL)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

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

OK: Go to Next Step

INSPECT SPIRAL CABLE

Disconnect the spiral cable connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specified condition
EAU - EAU	Always	Below 1 Ω
IL+2 - IL+2	Always	Below 1 Ω

Fig 3: Identifying Spiral Cable Connector Terminals (EAU) And (IL)

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 E15 connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

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

Fig 4: Disconnecting Radio Receiver E15 Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE RADIO RECEIVER

INSPECT RADIO RECEIVER

Disconnect the radio receiver E12 or E13 connector.

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

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

Fig 5: Disconnecting Radio Receiver E12 Or E13 Connector

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMBINATION METER)

Disconnect the combination meter E2 connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester connector	Condition	Specified condition
ILL- - E2-11	Always	Below 1 Ω

Fig 6: Disconnecting Combination Meter E2 Connector

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO COMBINATION METER