Multi-media Interface ECU Power Source Circuit: Procedure
- INSPECT MULTI-MEDIA INTERFACE ECU
- Disconnect the L35 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 Switch Condition Specified Condition L35-12 (+B) - L35-7 (GND) Always 11 to 14 V L35-11 (ACC) - L35-7 (GND) Engine switch on (ACC) 11 to 14 V
NG → See step 2
OK → See step 3
- CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - MULTI-MEDIA INTERFACE ECU)
- Disconnect the F40 radio receiver assembly connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition L35-11 (ACC) - F40-11 (ACC) Always Below 1 Ω L35-12 (+B) - F40-12 (+B) Always Below 1 Ω L35-7 (GND) - F40-7 (GND) Always Below 1 Ω L35-11 (ACC) - Body ground Always 10 kΩ or higher L35-12 (B+) - Body ground Always 10 kΩ or higher L35-7 (GND) - Body ground Always 10 kΩ or higher
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK → See step 3
- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE