Inspection Procedure

WARNING: This page is about a different car, the 2006 Toyota Tundra and 2005 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.

Inspect rear seat audio controller (+B1, ACC, GND).

PREPARATION:

Disconnect the R20 connector.

CHECK:

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

OK:

RESISTANCE CHECK SPECIFIED CONDITION

Tester connection	Condition	Specified condition
GND(R20-17) - Body ground	Always	Below 1 Ω

Fig 1: Inspecting Rear Seat Audio Controller (+B1, ACC, GND)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CHECK:

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

OK:

VOLTAGE CHECK SPECIFIED CONDITION

Tester connection	Condition	Specified condition
+B(R20-12) - Body ground	Always	10 to 14 V
ACC (R20-24) - Body ground	Ignition SW ACC	10 to 14 V

NG : Repair or replace harness or connector.
OK : GO TO NEXT STEP

Check problem symptoms table.

CHECK:

Check the problem symptoms table.

RESULT:

RESULT

Possible suspected areas still exist.	Go to step A
All possible suspected areas have been inspected.	Go to step B

B : Replace rear seat audio controller.
A : Proceed to next circuit inspection shown in problem symptoms table or diagnostic trouble code chart (See PROBLEM SYMPTOMS TABLE or DIAGNOSTIC TROUBLE CODE CHART ).