Multi-media Interface ECU Power Source Circuit: Procedure
- CHECK HARNESS AND CONNECTOR (INTERFACE ECU - BATTERY, BODY GROUND)
- Disconnect the L36 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 L36-12 (+B) - L36-7 (GND) Always 11 to 14 V L36-11 (ACC) - L36-7 (GND) Engine switch on (ACC) 11 to 14 V TEXT IN ILLUSTRATION*1 Front view of wire harness connector
(to Multi-media Interface ECU)
NG → See step 3
OK → See step 2
- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE
- CHECK HARNESS AND CONNECTOR (INTERFACE ECU - NAVIGATION MODULE)
- Disconnect the F43 display and navigation module display connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition L36-11 (ACC) - F43-11 (ACC) Always Below 1 Ω L36-12 (+B) - F43-12 (+B) Always Below 1 Ω L36-7 (GND) - F43-7 (GND) Always Below 1 Ω L36-11 (ACC) - Body ground Always 10 kΩ or higher L36-12 (+B) - Body ground Always 10 kΩ or higher L36-7 (GND) - Body ground Always 10 kΩ or higher
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK → See step 4
- REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY. Refer to REMOVAL