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:
DTC Description
DTC DETECTION LOGIC DTC No.
CONSULT screen items
(Trouble diagnosis content) DTC detecting condition
B2422–78
BACK DOOR STATE
(Back door state)
Diagnosis condition
All times
Signal (terminal)
Encoder LH A signal, encoder LH B signal, encoder RH A signal, encoder RH B signal (automatic back door control module connector terminal: 19, 20, 21)
Threshold
When the automatic back door control module detect the encoder pulse signal LH does not according with the encoder pulse signal RH
Diagnosis delay time
–
B2422–79
BACK DOOR STATE
(Back door state)
Diagnosis condition
All times
Signal (terminal)
–
Threshold
When automatic back door position information is deleted from automatic back door control module memory
Diagnosis delay time
–
POSSIBLE CAUSE
Improper installation of back door assembly
Calibration of automatic back door position information
Back door mechanism
Encoder
Harness or connectors (encoder circuit is open or shorted)
Automatic back door control module
Battery terminal is disconnected and reconnected
FAIL-SAFEInhibit automatic back door system auto open/close function
DTC Confirmation Procedure
PERFORM DTC CONFIRMATION PROCEDURE
CONSULT
Ignition switch ON...
Diagnosis Procedure
Door does not lock/unlock with door request switch, and engine does not start when ignition switch is pressed while carrying Intelligent Key. (One Intelligent Key has the symptom, other keys operate normally.)SYMPTOM TABLE (ONE INTELLIGENT KEY HAS THE SYMPTOM, OTHER KEYS OPERATE NORMALLY) Door lock operation (remote keyless entry) Door lock operation (request switch) or back door open operation (opener switch of back door panel) Engine started with push-button ignition switch operation (Intelligent Key is within the detection area of inside key antenna) Engine started with push-button ignition switch operation (registered Intelligent Key placed next to push-button ignition switch)
OK
NG
No crank, No start
OK
DIAGNOSIS PROCEDURERefer to Diagnosis Procedure...