Inspection Procedure

WARNING: This page is about a different car, the 2006 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 PRECAUTION for the Supplemental Restraint System article.

INSPECT RADIO AND NAVIGATION ASSEMBLY

Disconnect the radio and navigation assembly connector R10.

Measure the resistance according to the value(s) in TESTER CONNECTION SPECIFIED CONDITION .

Standard:

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specified condition
SW1 - SWG	No switch is pushed	Approx. 100 k
SW1 - SWG	SEEK+ switch: push	Approx. 0
SW1 - SWG	SEEK- switch: push	Approx. 0.3 k
SW1 - SWG	VOL+ switch: push	Approx. 1 k
SW1 - SWG	VOL- switch: push	Approx. 3.2 k
SW2 - SWG	No switch is pushed	Approx. 100 k
SW2 - SWG	MODE switch: push	Approx. 0
SW2 - SWG	VOICE switch: push	Approx. 3.2 k
SW2 - SWG	ON HOOK switch: push	Approx. 0.3 k
SW2 - SWG	OFF HOOK switch: push	Approx. 1 k

Fig 1: Disconnecting Radio & Navigation Assembly Connector R10

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 2

OK: RETURN TO THE ORIGINAL INSPECTION BECAUSE THE CHECK RESULT IS NORMAL

INSPECT STEERING PAD SWITCH

Fig 2: Disconnecting Steering Pad Switch Connector A

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the steering pad switch connector A.

Measure the resistance according to the value(s) in TESTER CONNECTION SPECIFIED CONDITION .

Standard:

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specified condition
AU1 - EAU	No switch is pushed	Approx. 100 k
AU1 - EAU	SEEK+ switch: push	Approx. 0
AU1 - EAU	SEEK- switch: push	Approx. 0.3 k
AU1 - EAU	VOL+ switch: push	Approx. 1 k
AU1 - EAU	VOL- switch: push	Approx. 3.2 k
AU2 - EAU	No switch is pushed	Approx. 100 k
AU2 - EAU	MODE switch: push	Approx. 0
AU2 - EAU	VOICE switch: push	Approx. 3.2 k
AU2 - EAU	ON HOOK switch: push	Approx. 0.3 k
AU2 - EAU	OFF HOOK switch: push	Approx. 1 k

NG: Go to step 4

OK: GO TO NEXT STEP.

INSPECT SPIRAL CABLE SUB-ASSEMBLY

Disconnect the steering pad switch and spiral cable sub-assembly connectors.

Measure the resistance according to the value(s) in TESTER CONNECTION SPECIFIED CONDITION .

Standard:

TESTER CONNECTION SPECIFIED CONDITION

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

Fig 3: Inspecting Spiral Cable Sub-Assembly

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE SPIRAL CABLE SUB-ASSEMBLY

OK: REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - RADIO AND NAVIGATION ASSEMBLY)

INSPECT STEERING PAD SWITCH CABLE SUB-ASSEMBLY

Fig 4: Inspecting Steering Pad Switch Cable Sub-Assembly

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the steering pad switch LH and the steering pad switch RH.

Measure the resistance according to the value(s) in TESTER CONNECTION SPECIFIED CONDITION .

Standard:

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specified condition
B-1 - C-1	Always	Below 1
B-2 - C-2	Always	Below 1
B-3 - C-3	Always	Below 1
B-4 - C-4	Always	Below 1
B-5 - C-5	Always	Below 1
B-6 - C-6	Always	Below 1
B-7 - C-7	Always	Below 1
B-8 - C-8	Always	Below 1
B-1 - Body ground	Always	10 k or higher
B-2 - Body ground	Always	10 k or higher
B-3 - Body ground	Always	10 k or higher
B-4 - Body ground	Always	10 k or higher
B-5 - Body ground	Always	10 k or higher
B-6 - Body ground	Always	10 k or higher
B-7 - Body ground	Always	10 k or higher
B-8 - Body ground	Always	10 k or higher

NG: REPLACE STEERING PAD SWITCH CABLE SUB-ASSEMBLY

OK: GO TO NEXT STEP.

INSPECT STEERING PAD SWITCH RH

Fig 5: Inspecting Steering Pad Switch RH

Reconnect the steering pad switch RH.

Measure the resistance according to the value(s) in TESTER CONNECTION SPECIFIED CONDITION .

Standard:

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specified condition
AU2 (B-4) - EAU (B-2)	No switch is pushed	10 k or higher
AU2 (B-5) - EAU (B-3)
AU2 (B-5) - EAU (B-2)
AU2 (B-4) - EAU (B-3)
AU2 (B-4) - EAU (B-2)	VOICE switch: push	Approx 3.2 k
AU2 (B-5) - EAU (B-3)
AU2 (B-5) - EAU (B-2)
AU2 (B-4) - EAU (B-3)
AU2 (B-4) - EAU (B-2)	ON HOOK switch: push	Approx 0.3 k
AU2 (B-5) - EAU (B-3)
AU2 (B-5) - EAU (B-2)
AU2 (B-4) - EAU (B-3)
AU2 (B-4) - EAU (B-2)	OFF HOOK switch: push	Approx 1 k
AU2 (B-5) - EAU (B-3)
AU2 (B-5) - EAU (B-2)
AU2 (B-4) - EAU (B-3)

NG: REPLACE STEERING PAD SWITCH RH

OK: REPLACE STEERING PAD SWITCH LH