Sound Signal Circuit between Navigation Receiver Assembly and Multi-media Interface ECU: Procedure
- CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - MULTI-MEDIA INTERFACE ECU)
- Disconnect the navigation receiver assembly connector.
- Disconnect the multi-media interface ECU connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition F37-2 (CDR+) - F28-2 (URO+) Always Below 1 Ω F37-3 (CDR-) - F28-3 (URO-) Always Below 1 Ω F37-4 (CDL+) - F28-4 (ULO+) Always Below 1 Ω F37-5 (CDL-) - F28-5 (ULO-) Always Below 1 Ω F37-2 (CDR+) - Body ground Always 10 kΩ or higher F37-3 (CDR-) - Body ground Always 10 kΩ or higher F37-4 (CDL+) - Body ground Always 10 kΩ or higher F37-5 (CDL-) - Body ground Always 10 kΩ or higher F28-1 (USD1) - Body ground Always 10 kΩ or higher TEXT IN ILLUSTRATION*1 Front view of wire harness connector
(to Navigation Receiver Assembly)*2 Front view of wire harness connector
(to Multi-media Interface ECU)
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step
- INSPECT MULTI-MEDIA INTERFACE ECU
- Reconnect the multi-media interface ECU connector.
- Check the waveform according to the conditions in the table below.
Standard
Tester Connection Condition Specified Condition F28-2 (URO+) - Body ground Sound being produced A waveform synchronized with sound is output F28-3 (URO-) - Body ground Sound being produced A waveform synchronized with sound is output F28-4 (ULO+) - Body ground Sound being produced A waveform synchronized with sound is output F28-5 (ULO-) - Body ground Sound being produced A waveform synchronized with sound is output TEXT IN ILLUSTRATION*1 Component with harness connected
(Multi-media Interface ECU)
NG → See step 4
OK → See step 3
- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE
- REPLACE MULTI-MEDIA INTERFACE ECU. Refer to REMOVAL