Inspection Procedure

WARNING: This page is about a different car, the 2009 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.

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 ).

INSPECT RADIO RECEIVER

Disconnect the radio receiver connector.
Measure the resistance according to the value(s) in the table below.

Standard Resistance

RESISTANCE SPECIFICATION

Tester Connection

Condition

Specified Condition

E26-7 (SW1) - E26-6 (SWG)

No switch Is pushed

95 to 105 kΩ

E26-7 (SW1) - E26-6 (SWG)

Seek+ switch: pushed

Below 2.5 Ω

E26-7 (SW1) - E26-6 (SWG)

Seek - switch: pushed

313.5 to 346.5 Ω

E26-7 (SW1) - E26-6 (SWG)

Volume+ switch: pushed

959.5 to 1060.5 Ω

E26-7 (SW1) - E26-6 (SWG)

Volume- switch: pushed

3049.5 to 3370.5 Ω

E26-8 (SW2) - E26-6 (SWG)

No switch Is pushed

95 to 105 kΩ

E26-8 (SW2) - E26-6 (SWG)

MODE switch: pushed

Below 2.5 Ω

E26-8 (SW2) - E26-6 (SWG)

Voice switch: pushed⁽¹⁾

3049.5 to 3370.5 Ω

E26-8 (SW2) - E26-6 (SWG)

On Hook switch: pushed⁽¹⁾

313.5 to 346.5 Ω

E26-8 (SW2) - E26-6 (SWG)

Off Hook switch: pushed⁽¹⁾

959.5 to 1060.5 Ω

⁽¹⁾	for 8 Speakers

Fig 1: Identifying Radio Receiver Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 2

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

INSPECT STEERING PAD SWITCH ASSEMBLY

Disconnect the steering pad switch assembly connector.
Measure the resistance according to the values in the table below.

Fig 2: Inspecting Steering Pad Switch Assembly

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Resistance

RESISTANCE SPECIFICATION

Tester Connection

Condition

Specified Condition

Y1-10 (AU1) - Y1-8 (EAU)

No switch is pushed

95 to 105 kΩ

Y1-10 (AU1) - Y1-8 (EAU)

Seek+ switch: pushed

Below 2.5 Ω

Y1-10 (AU1) - Y1-8 (EAU)

Seek- switch: pushed

313.5 to 346.5 Ω

Y1-10 (AU1) - Y1-8 (EAU)

Volume+ switch: pushed

959.5 to 1060.5 Ω

Y1-10 (AU1) - Y1-8 (EAU)

Volume- switch: pushed

3049.5 to 3370.5 Ω

Y1-9 (AU2) - Y1-8 (EAU)

No switch is pushed

95 to 105 kΩ

Y1-9 (AU2) - Y1-8 (EAU)

MODE switch: pushed

Below 2.5 Ω

Y1-9 (AU2) - Y1-8 (EAU)

Voice switch: pushed⁽¹⁾

3049.5 to 3370.5 Ω

Y1-9 (AU2) - Y1-8 (EAU)

ON HOOK switch: pushed⁽¹⁾

313.5 to 346.5 Ω

Y1-9 (AU2) - Y1-8 (EAU)

OFF HOOK switch: pushed⁽¹⁾

959.5 to 1060.5 Ω

⁽¹⁾	for 8 Speakers

NG: REPLACE STEERING PAD SWITCH ASSEMBLY (See REMOVAL )

OK: Go to Next Step

INSPECT SPIRAL CABLE

Disconnect the steering pad switch and spiral cable connectors.

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

Standard Resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
Y1-8 (EAU) - E6-4 (EAU)	Center	Below 1 Ω
	2.5 rotations to the left
	2.5 rotations to the right
Y1-10 (AU1) - E6-6 (AU1)	Center	Below 1 Ω
	2.5 rotations to the left
	2.5 rotations to the right
Y1-9 (AU2) - E6-5 (AU2)	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 page shown in the brackets.

HINT:

Removal (See REMOVAL )
Installation (See INSTALLATION )

NG: REPLACE SPIRAL CABLE (See REMOVAL )

Fig 3: Identifying Steering Pad Switch And Spiral Cable Connectors

OK: REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE - RADIO RECEIVER)