Nissan Murano: Heater & Air Conditioning Control System :: Dtc/circuit Diagnosis / Ecv (electrical Control Valve)
CHECK ECV (ELECTRICAL CONTROL VALVE) POWER SUPPLY
-
Ignition switch OFF.
-
Disconnect A/C compressor connector.
-
Ignition switch ON.
-
Check voltage between A/C compressor harness connector and ground.
+ − Voltage
(Approx.)A/C compressor Connector Terminal F4 4 Ground Battery voltage
Is the inspection result normal?
YES>>GO TO 3.
NO>>GO TO 2.
CHECK FUSE
-
Ignition switch OFF.
-
Check 10 A fuse [No. 29, located in fuse block (J/B)]. Refer to Terminal Arrangement.
Is the inspection result normal?
YES>>Repair harness or connector.
NO>>Replace the blown fuse after repairing the affected circuit.
CHECK ECV CONTROL SIGNAL CIRCUIT FOR OPEN
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Ignition switch OFF.
-
Disconnect A/C auto amp. connector.
-
Check continuity between A/C compressor harness connector and A/C auto amp. harness connector.
A/C compressor A/C auto amp. Continuity Connector Terminal Connector Terminal F4 3 M50 40 Yes
Is the inspection result normal?
YES>>GO TO 4.
NO>>Repair harness or connector.
CHECK ECV CONTROL SIGNAL CIRCUIT FOR SHORT
Check continuity between A/C compressor harness connector and ground.
| A/C compressor | — | Continuity | |
|---|---|---|---|
| Connector | Terminal | ||
| F4 | 3 | Ground | No |
Is the inspection result normal?
YES>>GO TO 5.
NO>>Repair harness or connector.
CHECK ECV
Check ECV. Refer to Component Inspection.
Is the inspection result normal?
YES>>GO TO 6.
NO>>Replace A/C compressor. Refer to Removal and Installation.
CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident.
Is the inspection result normal?
YES>>Replace A/C auto amp. Refer to Removal and Installation.
NO>>Repair or replace malfunctioning parts.
CHECK ECV (ELECTRICAL CONTROL VALVE)
-
Ignition switch OFF.
-
Disconnect A/C compressor connector.
-
Check continuity between A/C compressor connector.
A/C compressor Condition Resistance (Ω) Terminals Temperature: °F (°C) 3 4 68 (20) 10.1 – 11.1
Is the inspection result normal?
YES>>Inspection End.
NO>>Replace A/C compressor. Refer to Removal and Installation.
Magnet Clutch
Component Function Check
CHECK MAGNET CLUTCH OPERATION
Perform auto active test of IPDM E/R. Refer to Diagnosis Description.
Does it operate normally?
YES>>
Inspection End...
Other information:
Nissan Murano (Z52) 2015-2024 Service Manual: Front Fender
Exploded View 1. Front fender corner finisher 2. Front fender 3. Hoodledge cover 4. Front fender front bracket 5. Front fender rear bracket 6. Front fender baffle Pawl Clip Removal and Installation CAUTION: Use shop cloth to protect body from being damaged during removal and installation...
Nissan Murano (Z52) 2015-2024 Service Manual: U0300 Can Communication Data
DTC Description DTC DETECTION LOGICWhen the ignition switch is ON, the data length transmitted from each control unit is shorter than the specified length and the status continues for 2 seconds or more. DTC CONSULT screen terms (Trouble diagnosis content) DTC detection condition U0300 CAN COMM DATA (Internal Control Module Software Incompatibility) Diagnosis condition When the ignition switch is ON Signal CAN communication data Threshold The data length transmitted from each control unit is shorter than the specified length and the status Diagnosis delay time Continues for 2 seconds or more POSSIBLE CAUSEControl unit other than TCMFAIL-SAFE Selector shock is large Start is slow Acceleration is slow Lock-up is not performed DTC Confirmation Procedure PREPARATION BEFORE WORK If another “DTC CONFIRMATION PROCEDURE” occurs just before, turn ignition switch OFF and wait for at least 10 seconds, then perform the next test...
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