Dtc 14 Engine Coolant Temperature Communication Circuit

Vehicle Interior. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
Heating Air Conditioning. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK VEHICLE TYPE

CHECK FOR DTC (ENGINE CONTROL SYSTEM)

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - ECM)

CHECK FOR DTC (ENGINE CONTROL SYSTEM)

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - ECM)

DTC 14 Engine Coolant Temperature Communication Circuit


DESCRIPTION

The engine coolant temperature sensor connected to the ECM detects the engine coolant temperature, which is used for warm up control when the engine is cold. The engine coolant temperature sensor sends a signal to the air conditioning amplifier assembly via the ECM.

DTC Code
DTC Detection Condition
Trouble Area
14
An open or short in engine coolant temperature communication circuit
  1. ECD system (for 1KD-FTV [w/ EGR Cooler])
  2. ECD system (for 1KD-FTV [w/o EGR Cooler])
  3. ECD system (for 1KD-FTV [for DPF])
  4. ECD system (for 1KD-FTV [for i-ART])
  5. SFI system (for 2TR-FBE)
  6. SFI system (for 1GR-FE)
  7. Air conditioning amplifier assembly
  8. Harness or connector

WIRING DIAGRAM


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc 14 Engine Coolant Temperature Communication Circuit


INSPECTION PROCEDURE

1.CHECK VEHICLE TYPE

  1. Check the vehicle type.

    Result
    Result
    		Proceed to
    for 1KD-FTV
    		A
    for 2TR-FBE or 1GR-FE
    		B


B
Go to step 4
A


2.CHECK FOR DTC (ENGINE CONTROL SYSTEM)

  1. Clear the DTCs.

    1. for 1KD-FTV (w/ EGR Cooler): HILUX_TGN26 RM000000PDK0XBX.html.
    2. for 1KD-FTV (w/o EGR Cooler): HILUX_TGN26 RM000000PDK0XCX.html.
    3. for 1KD-FTV (for DPF): HILUX_TGN26 RM000000PDK0X2X.html.
    4. for 1KD-FTV (for i-ART): HILUX_TGN26 RM000000PDK0X4X.html.

  1. Check the DTCs.

    1. for 1KD-FTV (w/ EGR Cooler): HILUX_TGN26 RM000000PDK0XBX.html.
    2. for 1KD-FTV (w/o EGR Cooler): HILUX_TGN26 RM000000PDK0XCX.html.
    3. for 1KD-FTV (for DPF): HILUX_TGN26 RM000000PDK0X2X.html.
    4. for 1KD-FTV (for i-ART): HILUX_TGN26 RM000000PDK0X4X.html.
    Result
    Result
    		Proceed to
    DTC (P0115, P0117 or P0118) is not output.
    		A
    DTC (P0115, P0117 or P0118) is output. (for 1KD-FTV [w/ EGR Cooler])
    		B
    DTC (P0115, P0117 or P0118) is output. (for 1KD-FTV [w/o EGR Cooler])
    		C
    DTC (P0115, P0117 or P0118) is output. (for 1KD-FTV [for DPF])
    		D
    DTC (P0115, P0117 or P0118) is output. (for 1KD-FTV [for i-ART])
    		E


B
GO TO ECD SYSTEM (HILUX_TGN26 RM0000012WB04SX.html)

C
GO TO ECD SYSTEM (HILUX_TGN26 RM0000012WB04TX.html)

D
GO TO ECD SYSTEM (HILUX_TGN26 RM0000012WB04PX.html)

E
GO TO ECD SYSTEM (HILUX_TGN26 RM0000012WB04RX.html)
A


3.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - ECM)

  1. Disconnect the G94 air conditioning amplifier assembly connector.

  1. Disconnect the G39*1, G148*2 or G156*3 ECM connector.

    1. *1: for 1KD-FTV except DPF and i-ART
    2. *2: for 1KD-FTV for DPF
    3. *3: for 1KD-FTV for i-ART

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

    Standard Resistance:
    for 1KD-FTV except DPF and i-ART:
    Tester Connection
    		Condition
    		Specified Condition
    G94-8 (TW) - G39-2 (THWO)
    		Always
    		Below 1 Ω
    G94-8 (TW) - Body ground
    		Always
    		10 kΩ or higher
    for 1KD-FTV for DPF:
    Tester Connection
    		Condition
    		Specified Condition
    G94-8 (TW) - G148-16 (THWO)
    		Always
    		Below 1 Ω
    G94-8 (TW) - Body ground
    		Always
    		10 kΩ or higher
    for 1KD-FTV for i-ART:
    Tester Connection
    		Condition
    		Specified Condition
    G94-8 (TW) - G156-16 (THWO)
    		Always
    		Below 1 Ω
    G94-8 (TW) - Body ground
    		Always
    		10 kΩ or higher
    Result
    Result
    		Proceed to
    OK (When troubleshooting according to problem symptoms table.)
    		A
    OK (When troubleshooting according to DTC.)
    		B
    NG
    		C


B
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (HILUX_TGN26 RM000001K3A01QX.html)

C
REPAIR OR REPLACE HARNESS OR CONNECTOR
A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (HILUX_TGN26 RM0000045E301DX.html)

4.CHECK FOR DTC (ENGINE CONTROL SYSTEM)

  1. Clear the DTCs.

    1. for 2TR-FBE: HILUX_TGN26 RM000000PDK0T7X.html.
    2. for 1GR-FE: HILUX_TGN26 RM000000PDK0X5X.html.

  1. Check the DTCs.

    1. for 2TR-FBE: HILUX_TGN26 RM000000PDK0T7X.html.
    2. for 1GR-FE: HILUX_TGN26 RM000000PDK0X5X.html.
    Result
    Result
    		Proceed to
    DTC (P0115, P0117 or P0118) is not output.
    		A
    DTC (P0115, P0117 or P0118) is output. (for 2TR-FBE)
    		B
    DTC (P0115, P0117 or P0118) is output. (for 1GR-FE)
    		C


B
GO TO SFI SYSTEM (HILUX_TGN26 RM000000PD90QFX.html)

C
GO TO SFI SYSTEM (HILUX_TGN26 RM000000PD90T9X.html)
A


5.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - ECM)

  1. Disconnect the G94 air conditioning amplifier assembly connector.

  1. Disconnect the C97*1 or G154*2 ECM connector.

    1. *1: for 2TR-FBE
    2. *2: for 1GR-FE

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

    Standard Resistance:
    for 2TR-FBE:
    Tester Connection
    		Condition
    		Specified Condition
    G94-8 (TW) - C97-26 (THWO)
    		Always
    		Below 1 Ω
    G94-8 (TW) - Body ground
    		Always
    		10 kΩ or higher
    for 1GR-FE:
    Tester Connection
    		Condition
    		Specified Condition
    G94-8 (TW) - G154-14 (THWO)
    		Always
    		Below 1 Ω
    G94-8 (TW) - Body ground
    		Always
    		10 kΩ or higher
    Result
    Result
    		Proceed to
    OK (When troubleshooting according to problem symptoms table.)
    		A
    OK (When troubleshooting according to DTC.)
    		B
    NG
    		C


B
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (HILUX_TGN26 RM000001K3A01QX.html)

C
REPAIR OR REPLACE HARNESS OR CONNECTOR
A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (HILUX_TGN26 RM0000045E301DX.html)