Nissan Murano: Heater & Air Conditioning Control System :: Dtc/circuit Diagnosis / B2796 Fr Sw Comm Error
DTC DETECTION LOGIC
| DTC No. |
CONSULT screen terms (Trouble diagnosis content) | DTC detection condition | |
|---|---|---|---|
| B2796 |
FR SW COMM ERROR (Front switch communication error) |
Diagnosis condition | When ignition switch is ON. |
| Signal (terminal) | - | ||
| Threshold | - | ||
| Diagnosis delay time | 2 seconds or more | ||
POSSIBLE CAUSE
-
A/C switch assembly
-
A/C auto amp.
-
Harness and connector (Communication line is open or shorted)
FAIL-SAFE
—
PERFORM DTC CONFIRMATION PROCEDURE
CONSULT
-
Ignition switch ON.
-
Select “Self Diagnostic Result” mode of “HVAC”.
-
Check DTC.
Is DTC detected?
YES>>Refer to DTC Diagnosis Procedure.
NO>>Inspection End.
CHECK COMMUNICATION SIGNAL CIRCUIT (A/C AUTO AMP. → A/C SWITCH ASSEMBLY) FOR OPEN
-
Ignition switch OFF.
-
Disconnect A/C switch assembly connector and A/C auto amp. connector.
-
Check continuity between A/C switch assembly harness connector and A/C auto amp. harness connector.
A/C switch assembly A/C auto amp. Continuity Connector Terminal Connector Terminal M142 12 M50 24 Yes
Is the inspection result normal?
YES>>GO TO 2.
NO>>Repair harness or connector.
CHECK COMMUNICATION SIGNAL CIRCUIT (A/C AUTO AMP. → A/C SWITCH ASSEMBLY) FOR SHORT
Check continuity between A/C switch assembly harness connector and ground.
| A/C switch assembly | — | Continuity | ||
|---|---|---|---|---|
| Connector | Terminal | |||
| M142 | 12 | Ground | No | |
Is the inspection result normal?
YES>>GO TO 3.
NO>>Repair harness or connector.
CHECK COMMUNICATION SIGNAL CIRCUIT (A/C SWITCH ASSEMBLY → A/C AUTO AMP.) FOR OPEN
Check continuity between A/C switch assembly harness connector and A/C auto amp. harness connector.
| A/C switch assembly | A/C auto amp. | Continuity | ||
|---|---|---|---|---|
| Connector | Terminal | Connector | Terminal | |
| M142 | 11 | M50 | 4 | Yes |
Is the inspection result normal?
YES>>GO TO 4.
NO>>Repair harness or connector.
CHECK COMMUNICATION SIGNAL CIRCUIT (A/C SWITCH ASSEMBLY → A/C AUTO AMP.) FOR SHORT
Check continuity between A/C switch assembly harness connector and ground.
| A/C switch assembly | — | Continuity | ||
|---|---|---|---|---|
| Connector | Terminal | |||
| M142 | 11 | Ground | No | |
Is the inspection result normal?
YES>>Replace A/C auto amp. Refer to Removal and Installation.
NO>>Repair harness or connector.
B2667 Pass Sunload Sensor
DTC Description
DTC DETECTION LOGICNOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to DTC Description (U1000) or DTC Description (U1010)...
B27b0 A/c Auto Amp.
DTC Description
DTC DETECTION LOGICNOTE:
If DTC is displayed along with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to DTC Description...
Other information:
Nissan Murano (Z52) 2015-2024 Service Manual: Power Supply and Ground Circuit
Diagnosis Procedure CHECK FUSE Check that the following fuse is not blown: Terminal No. Signal name Fuse No. Capacity 12 IGN power supply 29 10 A Is the fuse blown? YES>> Replace the blown fuse after repairing the affected circuit...
Nissan Murano (Z52) 2015-2024 Service Manual: The System Does Not Detect the Vehicle Ahead at All
Diagnosis Procedure When ICC system is active, the ICC system does not perform any control even though there is a vehicle ahead.CHECK ICC SYSTEM DISPLAY ON INFORMATION DISPLAY Start the self-diagnosis mode of combination meter. Refer to On Board Diagnosis Function...
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Driver and passenger supplemental knee air bag
Driver’s side
The knee air bag is located in the knee bolster, on the driver’s and passenger’s side. All of the information, cautions and warnings in this manual apply and must be followed. The knee air bag is designed to inflate in higher severity frontal collisions, although it may inflate if the forces in another type of collision are similar to those of a higher severity frontal impact. It may not inflate in certain collisions.
Passenger’s side
