Multi-media Interface ECU Power Source Circuit (TO 12/2010): Procedure
WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
- INSPECT MULTI-MEDIA INTERFACE ECU
- Disconnect the multi-media interface ECU connector.
- Measure the voltage according to the value(s) in the table below.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Standard Voltage
Tester Connection Condition Specified Condition E41-12 (+B) - E41-7 (GND) Always 11 to 14 V E41-11 (ACC) - E41-7 (GND) Ignition switch ACC 11 to 14 V TEXT IN ILLUSTRATION*a Front view of wire harness connector
(to Multi-media Interface ECU)
NG → See step 3
OK → See step 4
- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE
- CHECK HARNESS AND CONNECTOR
- Disconnect the radio receiver assembly connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition E41-11 (ACC) - E35-11 (ACC) Always Below 1 Ω E41-12 (+B) - E35-12 (+B) Always Below 1 Ω E41-7 (GND) - E35-7 (GND) Always Below 1 Ω E41-11 (ACC) - Body ground Always 10 kΩ or higher E41-12 (+B) - Body ground Always 10 kΩ or higher E41-7 (GND) - Body ground Always 10 kΩ or higher
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK → See step 2
- REPLACE MULTI-MEDIA INTERFACE ECU. Refer to REMOVAL