Inspection Procedure

WARNING: This page is about a different car, the 2005 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: The vehicle is equipped with 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 .

INSPECT RADIO AND NAVIGATION ASSY

Disconnect the radio and navigation assy connector R10.
Measure the resistance according to the value(s) in the table below.

Standard:

RADIO AND NAVIGATION ASSY TESTER CONNECTION - SPECIFIED CONDITION

Tester connection	Condition	Specified condition
SW1 - SWG	No switch is pushed	Approx. 100 kΩ
SW1 - SWG	SEEK+ switch: push	Approx. 0 Ω
SW1 - SWG	SEEK- switch: push	Approx. 0.3 kΩ
SW1 - SWG	VOL+ switch: push	Approx. 1 kΩ
SW1 - SWG	VOL- switch: push	Approx. 3.2 kΩ
SW2 - SWG	No switch is pushed	Approx. 100 kΩ
SW2 - SWG	MODE switch: push	Approx. 0 Ω

Fig 1: Disconnecting Radio And Navigation Assy Connector R10

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 2

OK: Go to next step.

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

INSPECT STEERING PAD SWITCH ASSY

Fig 2: Inspecting Steering Pad Switch Assy

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the steering pad switch assy connector C13.
Measure the resistance according to the value(s) in the table below.

Standard:

STEERING PAD SWITCH ASSY TESTER CONNECTION - SPECIFIED CONDITION

Tester connection	Condition	Specified condition
AU1 - EAU	No switch is pushed	Approx. 100 kΩ
AU1 - EAU	SEEK+ switch: push	Approx. 0 Ω
AU1 - EAU	SEEK- switch: push	Approx. 0.3 kΩ
AU1 - EAU	VOL+ switch: push	Approx. 1 kΩ
AU1 - EAU	VOL- switch: push	Approx. 3.2 kΩ
AU2 - EAU	No switch is pushed	Approx. 100 kΩ
AU2 - EAU	MODE switch: push	Approx. 0 Ω

NG: REPLACE STEERING PAD SWITCH LH

OK: Go to next step.

INSPECT SPIRAL CABLE SUB-ASSY

Disconnect the steering pad switch assy and spiral cable sub-assy connectors.
Measure the resistance according to the value(s) in the table below.

Standard:

SPIRAL CABLE SUB-ASSY TESTER CONNECTION - SPECIFIED CONDITION

Tester connection	Specified condition
EAU - EAU	Below 1 Ω
AU1 - AU1	Below 1 Ω
AU2 - AU2	Below 1 Ω

Fig 3: Inspecting Spiral Cable Sub-Assy

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE SPIRAL CABLE SUB-ASSY

OK: Go to next step.

CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSY - RADIO AND NAVIGATION ASSY)

Disconnect the connectors from the spiral cable sub-assy and radio and navigation assy.
Measure the resistance according to the value(s) in the table below.

Standard:

SPIRAL CABLE SUB-ASSY - RADIO AND NAVIGATION ASSY TESTER CONNECTION - SPECIFIED CONDITION

Tester connection	Specified condition
SW1 - AU1	Below 1 Ω
SW2 - AU2	Below 1 Ω
SWG - EAU	Below 1 Ω
SW1 - Body ground	10 k or higher
SW2 - Body ground	10 k or higher
SWG - Body ground	10 k or higher

Fig 4: Disconnecting Radio And Navigation Assy Connector

Fig 5: Spiral Cable Sub Assy Connector Front View

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE