Nissan Murano: Dtc/circuit Diagnosis / Amp on Signal Circuit
Diagnosis Procedure
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.
Diagnosis Procedure
CONNECTOR CHECK
Check the AV control unit, Bose speaker amp. and speaker connectors for the following:
Proper connection
Damage
Disconnected or loose terminals
Is the inspection result normal?
YES>>
GO TO 2...
Diagnosis Procedure
CHECK STEERING WHEEL AUDIO CONTROL SWITCH RESISTANCE
Ignition switch OFF.
Disconnect combination switch connector.
Check resistance between the terminals of combination switch connector...
Other information:
Temperature control dial (driver’s side)/AUTO button
ON-OFF button
Display screen
MODE (manual air flow control) button
Temperature control dial (passenger’s side)/DUAL button
Fresh air intake button
Air recirculation button
A/C (air conditioner)
button
fan speed control buttons
REAR window and outside
mirror (if so equipped) defroster switch
FRONT (defroster) button
WARNING
The air conditioner cooling function
operates only when the engine is
running...
Engine Lubrication System
1.
Camshaft (EXH) journal (No. 1)
2.
Timing chain tensioner (secondary)
3.
Camshaft (EXH)
4.
Camshaft (INT) journal (No. 2)
5.
Camshaft (INT)
6.
Cylinder head (bank 2)
7.
Main oil gallery
8.
Upper oil pan
9...