Nissan Juke Service and Repair Manual : Insufficient heating

Description

Symptom
• Insufficient heating
• No warm air comes out. (Air flow volume is normal.)

Diagnosis Procedure

NOTE

:
Perform self-diagnosis with CONSULT-III before performing symptom diagnosis. If any malfunction result or DTC is detected, perform the corresponding diagnosis.

1.CHECK COOLING SYSTEM

1. Check engine coolant level and check for leakage. Refer to the following.

- HR16DE: Refer to CO-37, "Inspection".

- MR16DDT: Refer to CO-11, "Inspection".

- K9K: Refer to CO-62, "Inspection".

2. Check radiator cap (HR16DE and MR16DDT) or reservoir tank cap (K9K). Refer to the following.

- HR16DE: Refer to CO-40, "RADIATOR CAP : Inspection".

- MR16DDT: Refer to CO-15, "RADIATOR CAP : Inspection".

- K9K: Refer to CO-65, "Inspection".

3. Check water flow sounds of the engine coolant. Refer to the following.

- HR16DE: Refer to CO-38, "Refilling".

- MR16DDT: Refer to CO-12, "Refilling".

- K9K: Refer to CO-63, "Refilling".

Is the inspection result normal? YES-1 >> HR16DE and MR16DDT: GO TO 3.

YES-2 >> K9K: GO TO 2.

NO >> Refill engine coolant and repair or replace the parts depending on the inspection results.

2.CHECK PTC HEATER OPERATION

Check PTC heater operation. Refer to HAC-294, "Component Function Check".

Is the inspection result normal? YES >> GO TO 3.

NO >> Repair or replace parts depending on the inspection results.

3.CHECK HEATER HOSE

Check installation of heater hose by visually or touching.

Is the inspection result normal? YES >> GO TO 4.

NO >> Repair or replace parts depending on the inspection results.

4.CHECK HEATER CORE

1. Check temperature of inlet hose and outlet hose of heater core.

2. Check that inlet side of heater core is hot and the outlet side is slightly lower than/almost equal to the inlet side.

CAUTION:
Always perform the temperature inspection in a short period of time because the engine coolant temperature is very hot.

Is the inspection result normal?

YES >> GO TO 5.

NO-1 >> HR16DE: Replace heater core. Refer to HA-56, "HEATER CORE : Removal and Installation".

NO-2 >> MR16DDT: Replace heater core. Refer to HA-116, "HEATER CORE : Removal and Installation".

NO-3 >> K9K: Replace heater core.

5.CHECK AIR LEAKAGE FROM EACH DUCT

Check duct and nozzle, etc. of air conditioning system for air leakage.

Is the inspection result normal? YES >> Check air mix door cable installation and air mix door operation.

NO >> Repair or replace parts depending on the inspection results.

    Insufficient cooling
    Description Symptom • Insufficient cooling • No cool air comes out. (Air flow volume is normal.) Diagnosis Procedure NOTE: Perform self-diagnosis with CONSULT-III before performing symptom diagn ...

    Compressor dose dot operate
    Description SYMPTOM Compressor dose not operate. Diagnosis Procedure NOTE: • Perform self-diagnosis with CONSULT-III before performing symptom diagnosis. If any malfunction result or DTC is de ...

    Other materials:

    Door motor
    Diagnosis Procedure NOTE: If all of door motor DTCs are detected, check this circuit. 1.CHECK DOOR MOTOR POWER SUPPLY 1. Turn ignition switch ON. 2. Check voltage between intake door motor harness connector and ground. Is the inspection result normal? YES >> GO TO 2. NO >> ...

    Precaution Necessary for Steering Wheel Rotation after Battery Disconnect
    NOTE: • Before removing and installing any control units, first turn the ignition switch to the LOCK position, then disconnect both battery cables. • After finishing work, confirm that all control unit connectors are connected properly, then re-connect both battery cables. • Always use CONS ...

    Flushing
    1. Install reservoir tank if removed and radiator drain plug. CAUTION: Be sure to clean drain plug and install with new O-ring. Radiator drain plug : Refer to CO-42, "Exploded View". • If water drain plugs on cylinder block are removed, close and tighten them. Refer to EM-228, &quo ...