Nissan Rogue (T33) 2021-Present Service Manual: P14a8 Charge Air Cooler Cooling Electric Water Pump

Nissan Rogue (T33) 2021-Present Service Manual / Engine :: Engine Control System / Kr15ddt :: Dtc/circuit Diagnosis / P14a8 Charge Air Cooler Cooling Electric Water Pump

DTC Description

DTC DETECTION LOGIC

DTC

CONSULT screen terms

(Trouble diagnosis content) 		DTC detection condition
P14A8

Charge air cooler cooling electric W/P

(Charge air cooler cooling electric water pump) 		Diagnosis condition

  • Engine running at idle

  • Warm-up condition

  • Battery voltage: More than 11V
Signal (terminal) Charge air cooler (CAC) cooling electric water pump 1 command signal
Threshold Pump feedback duty signal is 2 – 8%
Diagnosis delay time 19 seconds or more

POSSIBLE CAUSE

  • Harness and connectors [Charge air cooler electric water pump command circuit is open or shorted.]

  • Charge air cooler electric water pump

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

PRECONDITIONING

NOTE:

When DTC Confirmation Procedure has been preciously conducted, always perform the following before conducting the next test.

  1. Turn ignition switch OFF and wait at least 10 seconds.

  2. Turn ignition switch ON.

  3. Turn ignition switch OFF and wait at least 10 seconds.

>>

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE

NOTE:

Before performing this procedure, check that the battery voltage is more than 11 V during ignition switch ON.

  1. Start the engine and warm it up to the normal operating temperature.

  2. Wait at least 20 seconds.

  3. Check 1st trip DTC.

Is DTC P14A8 detected?

YES>>

Proceed to DTC Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

DTC Diagnosis Procedure

COMPONENT FUNCTION CHECK

With CONSULT

  1. Start the engine.

  2. On CONSULT screen, select “ENGINE”>>“Active Test”>>“Charge air cooler cooling electric water pump”.

  3. Check the value of charge air cooler electric water pump duty under the following conditions:

    Item Condition Value

    • Charge air cooler electric water pump

    		 Normal mode 20 – 80

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

GO TO 2.

CHECK CHARGE AIR COOLER ELECTRIC WATER PUMP HARNESS CONNECTOR INSTALLATION

Check charge air cooler electric water pump harness connector installation condition visually and tectually.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace error-detected parts.

CHECK CHARGE AIR COOLER ELECTRIC WATER PUMP POWER SUPPLY-I

  1. Turn ignition switch OFF.

  2. Disconnect charge air cooler electric water pump harness connector.

  3. Turn ignition switch ON.

  4. Check the voltage between charge air cooler electric water pump harness connector and ground.

    + − Voltage
    Charge air cooler electric water pump
    Connector Terminal
    E36 2 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 11.

NO>>

GO TO 4.

CHECK CHARGE AIR COOLER ELECTRIC WATER PUMP POWER SUPPLY-II

  1. Turn ignition switch OFF.

  2. Disconnect electric water pump relay and electric purge pump relay harness connector.

  3. Turn ignition switch ON.

  4. Check the voltage between electric water pump relay and electric purge pump relay harness connector and ground.

    + − Voltage
    electric water pump relay and electric purge pump relay
    Connector Terminal
    F103 9 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

GO TO 5.

CHECK CHARGE AIR COOLER ELECTRIC WATER PUMP POWER SUPPLY CIRCUIT-I

  1. Turn ignition switch OFF.

  2. Disconnect IPDM E/R harness connector.

  3. Check the continuity between IPDM E/R harness connector and electric water pump relay and electric purge pump relay harness connector.

    IPDM E/R Electric water pump relay and electric purge pump relay Continuity
    Connector Terminal Connector Terminal
    F35 66 F103 9 Existed

  4. Also check harness for short to power and short to ground.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Repair or replace error-detected parts.

CHECK CHARGE AIR COOLER ELECTRIC WATER PUMP POWER SUPPLY-III

  1. Turn ignition switch OFF.

  2. Check the voltage between electric water pump relay and electric purge pump relay harness connector and ground.

    + − Voltage
    Electric water pump relay and electric purge pump relay
    Connector Terminal
    F103 7 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 8.

NO>>

GO TO 7.

CHECK FUSE

  1. Pull out 15A fuse (No. 98) .

  2. Check that the fuse is not blowing.

Is the fuse blown (open)?

YES>>

Replace the fuse after repairing the applicable circuit.

NO>>

Perform the trouble diagnosis for power supply circuit.

CHECK CHARGE AIR COOLER ELECTRIC WATER PUMP POWER SUPPLY CIRCUIT-II

Check the continuity between electric water pump relay and electric purge pump relay and ground.

Electric water pump relay and electric purge pump relay — Continuity
Connector Terminal
F103 8 Ground Existed

Is the inspection result normal?

YES>>

GO TO 9.

NO>>

Repair or replace error-detected parts.

CHECK CHARGE AIR COOLER ELECTRIC WATER PUMP POWER SUPPLY CIRCUIT-III

  1. Check the continuity between electric water pump relay and electric purge pump relay and charge air cooler electric water pump harness connector.

    Electric water pump relay and electric purge pump relay Charge air cooler electric water pump Continuity
    Connector Terminal Connector Terminal
    F103 6 E36 2 Existed

  2. Also check harness for short to power and short to ground.

Is the inspection result normal?

YES>>

GO TO 10.

NO>>

Repair or replace error-detected parts.

CHECK ELECTRIC WATER PUMP RELAY AND ELECTRIC PURGE PUMP RELAY

Check electric water pump relay and electric purge pump relay. Refer to Component Inspection.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace CAC cooling relay.

CHECK CHARGE AIR COOLER ELECTRIC WATER PUMP GROUND CIRCUIT

Check the continuity between charge air cooler electric water pump harness connector and ground.

Charge air cooler electric water pump — Continuity
Connector Terminal
E36 4 Ground Existed

Is the inspection result normal?

YES>>

GO TO 12.

NO>>

Repair or replace error-detected parts.

CHECK CHARGE AIR COOLER ELECTRIC WATER PUMP CONTROL CIRCUIT

  1. Disconnect ECM harness connector.

  2. Check the continuity between ECM harness connector and charge air cooler electric water pump harness connector.

    ECM Charge air cooler electric water pump Continuity
    Connector Terminal Connector Terminal
    F72 32 E36 3 Existed
    39 1

  3. Also check harness for short to power and short to ground.

Is the inspection result normal?

YES>>

Replace charge air cooler electric water pump. Refer toRemoval and Installation .

NO>>

Repair or replace error-detected parts.

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