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.

INSPECT RADIO AND NAVIGATION ASSEMBLY

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

Standard:

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specified condition
MACC - Body ground	Ignition SW ACC	4 to 6 V

Fig 1: Inspecting Radio & Navigation Assembly

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE RADIO AND NAVIGATION ASSEMBLY

OK: GO TO NEXT STEP.

CHECK HARNESS AND CONNECTOR

Disconnect the radio and navigation assembly connector R26.

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

Standard:

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specified condition
SGND - TSW-	Always	Below 1

Fig 2: Disconnecting Radio & Navigation Assembly Connector R26

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO NEXT STEP.

CHECK HARNESS AND CONNECTOR (MICROPHONE - RADIO AND NAVIGATION ASSEMBLY)

Disconnect the microphone connector T18 and radio and navigation assembly connector R26.

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

Standard:

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specified condition
ACC - MACC	Always	Below 1
MIC+ - MIC+	Always	Below 1
MIC- - MIC-	Always	Below 1
ACC - Body ground	Always	10 k or higher
MIC+ - Body ground	Always	10 k or higher
MIC- - Body ground	Always	10 k or higher

Fig 3: Disconnecting Microphone Connector T18 & Radio & Navigation Assembly Connector R26

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

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