Multi-media Interface ECU Power Source Circuit: Procedure
- INSPECT MULTI-MEDIA INTERFACE ECU
- Disconnect the multi-media interface ECU connector.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition E30-12 (+B) - E30-7 (GND) Always 11 to 14 V E30-11 (ACC) - E30-7 (GND) Ignition switch ACC 11 to 14 V
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 E30-11 (ACC) - E16-11 (ACC) Always Below 1 Ω E30-12 (+B) - E16-12 (+B) Always Below 1 Ω E30-7 (GND) - E16-7 (GND) Always Below 1 Ω E30-11 (ACC) - Body ground Always 10 kΩ or higher E30-12 (+B) - Body ground Always 10 kΩ or higher E30-7 (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