Dtc 047 Short In Heater Fuel Pump Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (HEATER ASSEMBLY - HEATER PUMP ASSEMBLY)

CHECK HARNESS AND CONNECTOR (HEATER PUMP ASSEMBLY - BODY GROUND)

INSPECT HEATER PUMP ASSEMBLY

DTC 047 Short in Heater Fuel Pump Circuit

DTC 048 Heater Fuel Pump Malfunction

DTC 049 Heater Fuel Pump Output Error


DESCRIPTION


DTC Code
DTC Detection Condition
Trouble Area
047
A short is detected in the heater pump circuit.
  1. Harness or connector
  2. Heater pump assembly
  3. Heater assembly
048
Operation stop of the heater pump is detected. (Open in the circuit)
  1. Harness or connector
  2. Heater pump assembly
  3. Heater assembly
049
An error is detected in output to the heater pump.
  1. Harness or connector
  2. Heater pump assembly
  3. Heater assembly

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc 047 Short In Heater Fuel Pump Circuit


INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR (HEATER ASSEMBLY - HEATER PUMP ASSEMBLY)

  1. Disconnect the A97 heater assembly connector.

  1. Disconnect the A96 heater pump assembly connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A97-2 (L) - A96-2 (B2)
    		Always
    		Below 1 Ω
    A97-2 (L) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.CHECK HARNESS AND CONNECTOR (HEATER PUMP ASSEMBLY - BODY GROUND)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc 047 Short In Heater Fuel Pump Circuit

  1. Disconnect the heater pump assembly connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A96-1 (E2) - Body ground
    		Always
    		Below 1 Ω
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Heater Pump Assembly)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.INSPECT HEATER PUMP ASSEMBLY


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc 047 Short In Heater Fuel Pump Circuit

  1. Remove the heater pump assembly (LandCruiser RM000005TN8000X.html).

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    2 (B2) - 1 (E2)
    		Always
    		9 to 12 Ω

  1. Inspect the heater pump assembly operation.

    1. Connect a positive (+) lead from the battery to terminal 2 (B2) and a negative (-) lead to terminal 1 (E2), and check the pressure of the hose by hand.

      NOTICE:
      This inspection must be done quickly (within 10 seconds) to prevent damage to the heater pump assembly.
      Result
      Result
      		Proceed to
      The pressure is applied to the hose
      		A
      The pressure is not applied to the hose
      		B


B
REPLACE HEATER PUMP ASSEMBLY (LandCruiser RM000005TNE000X.html)
A

REPLACE HEATER ASSEMBLY (LandCruiser RM000005TN8000X.html)