CHECK CONTINUITY BETWEEN AV CONTROL UNIT AND BOSE SPEAKER AMP.
Ignition switch OFF.
Disconnect AV control unit connector and Bose speaker amp. connector.
Check continuity between AV control unit connector and Bose speaker amp. connector.
| AV control unit | Bose speaker amp. | Continuity | ||
|---|---|---|---|---|
| Connector | Terminal | Connector | Terminal | |
| M161 | 1 | B121 | 20 | Yes |
Check continuity between AV control unit connector and ground.
| AV control unit | Ground | Continuity | |
| Connector | Terminal | ||
| M161 | 1 | — | No |
Is the inspection result normal?
YES>>GO TO 2.
NO>>Repair or replace harness or connectors.
CHECK AV CONTROL UNIT VOLTAGE
Connect AV control unit connector.
Ignition switch ON.
Check voltage between AV control unit connector and ground.
| AV control unit | Ground |
Voltage (Approx.) |
|
| (+) | (–) | ||
| Connector | Terminal | ||
| M161 | 1 | — | Battery voltage |
Is the inspection result normal?
YES>>Replace Bose speaker amp. Refer to Removal and Installation.
NO>>Replace AV control unit. Refer to Removal and Installation.
Instrument Panel Tweeter
Steering Switches