Microphone Circuit between Overhead Junction Block and Multi-display: Procedure
- INSPECT TELEPHONE MICROPHONE
- Disconnect the P12 microphone connector.
- Measure the resistance of the microphone.
Standard resistance
Tester Connection Specified Condition 2 - 7 Approx. 750 Ω
NG → REPLACE TELEPHONE MICROPHONE
OK: Go to next step
- CHECK WIRE HARNESS (TELEPHONE MICROPHONE AMPLIFIER - TELEPHONE MICROPHONE AND MULTI-DISPLAY)
- Disconnect the M7 and M8 amplifier connectors.
- Disconnect the M6 display connector.
- Disconnect the P12 microphone connector.
- Measure the resistance of the wire harness side connectors.
Standard resistance
Tester Connection Specified Condition M8-2 (MIC-) - P12-2 Below 1 Ω M8-4 (MIC+) - P12-7 Below 1 Ω M7-4 (MIC+) - M6-5 (MIN+) Below 1 Ω M7-2 (MIC-) - M6-6 (MIN-) Below 1 Ω M7-5 (MACC) - M6-7 (MACO) Below 1 Ω M8-4 (MIC+) - Body ground 10 kΩ or higher M7-2 (MIC-) - Body ground 10 kΩ or higher M7-4 (MIC+) - Body ground 10 kΩ or higher M7-5 (MACC) - Body ground 10 kΩ or higher
NG → REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: Go to next step
- INSPECT INSTRUMENT CLUSTER FINISH PANEL CENTER
- Remove the instrument cluster finish panel center.
- Measure the resistance of the panel.
Standard resistance
Tester Connection Specified Condition M6-7 (MACO) - B-6 (MACO) Below 1 Ω M6-5 (MIN+) - B-4 (MIN+) Below 1 Ω M6-6 (MIN-) - B-5 (MIN-) Below 1 Ω M6-7 (MACO) - Body ground 10 kΩ or higher M6-5 (MIN+) - Body ground 10 kΩ or higher M6-6 (MIN-) - Body ground 10 kΩ or higher
NG → REPAIR OR REPLACE INSTRUMENT CLUSTER FINISH PANEL SUB-ASSEMBLY CENTER
OK: Go to next step
- CHECK OPERATION OF TELEPHONE MICROPHONE AMPLIFIER
- Replace the telephone microphone amplifier with a normal one.
- Check that the ignition switch can be turned ON and that voice recognition is normal.
OK
Voice is recognition is normal.
NG → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN DIAGNOSTIC TROUBLE CODE CHART
OK → END (REPLACE TELEPHONE MICROPHONE AMPLIFIER)