AUDIO — Troubleshooting Flowchart No.1: No speakers operate
J-8flowchartFlowchart No.1 — Symptom: No speakers operate
NOTE
Possible cause: Burnt RADIO 15 A fuse; Burnt ROOM 15 A fuse; Damaged audio unit; Open or short circuit in wiring harness; Poor connection of connector.
Flowchart No.1 — No speakers operate
1
Step 1: Check the RADIO 15 A fuse and ROOM 15 A fuse in the fuse block.
Fuse Burnt
Replace fuse after checking and repairing wiring harness.
Fuse OK
2
Step 2: Remove the audio unit (refer to page J-20). Verify that the audio unit connector is properly connected; reconnect if necessary. If connections are OK, go to Step 3.
Connections OK
3
Step 3: Turn the ignition switch to ACC. Measure the voltage at the terminals of the audio unit connector (B+ = battery positive voltage).
Terminal 1A = Other
Terminal 1A = Other: Repair wiring harness (RADIO 15 A fuse — Audio unit).
Terminal 1A = B+
4
Terminal 1A = B+: Measure voltage at terminal 1C.
Terminal 1C = Other
Terminal 1C = Other: Repair wiring harness (ROOM 15 A fuse — Audio unit).
Terminal 1C = B+ (turn ignition to LOCK, go to Step 4)
5
Step 4: Disconnect the audio unit connector. Check for continuity between terminal 3A (B) of the audio unit connector and ground.
Continuity: No
Repair wiring harness (Audio unit — GND).
Continuity: Yes
Replace audio unit.
Step 1 — Fuse check
OK
ActionGo to Step 2
Burnt
ActionReplace fuse after checking and repairing wiring harness
Step 3 — Voltage check (B+: Battery positive voltage)
1A
VoltageB+
ActionMeasure voltage at terminal 1C
1A
VoltageOther
ActionRepair wiring harness (RADIO 15 A fuse — Audio unit)
1C
VoltageB+
ActionTurn ignition switch to LOCK and go to Step 4
1C
VoltageOther
ActionRepair wiring harness (ROOM 15 A fuse — Audio unit)
Step 4 — Continuity check (terminal 3A to ground)
Yes
ActionReplace audio unit
No
ActionRepair wiring harness (Audio unit — GND)