Dtc 14 Engine Coolant Temperature Communication Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DTC (ENGINE CONTROL SYSTEM)

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - ECM)

DTC 14 Engine Coolant Temperature Communication Circuit


DESCRIPTION

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

DTC Code
Detection Item
Trouble Area
14
Open or short in engine coolant temperature communication circuit
  1. Engine control system
  2. Harness or connector
  3. Air conditioning amplifier assembly

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc 14 Engine Coolant Temperature Communication Circuit


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc 14 Engine Coolant Temperature Communication Circuit


INSPECTION PROCEDURE

1.CHECK DTC (ENGINE CONTROL SYSTEM)

  1. Use the intelligent tester to check if the engine control system is functioning normally.

    Result
    Result
    		Proceed to
    DTC (P0115, P0117 or P0118) is not output.
    		A
    DTC (P0115, P0117 or P0118) is output.
    (for 1KD-FTV)
    		B
    DTC (P0115, P0117 or P0118) is output.
    (for 1GR-FE)
    		C


B
GO TO ENGINE CONTROL SYSTEM (for 1KD-FTV) (Toyota Fortuner RM0000012WB005X.html)

C
GO TO ENGINE CONTROL SYSTEM (for 1GR-FE) (Toyota Fortuner RM000000PD901BX.html)
A


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


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc 14 Engine Coolant Temperature Communication Circuit

  1. Disconnect the A16 amplifier connector.

  1. Disconnect the E4*1 or E13*2 ECM connector.

    1. *1: for 1KD-FTV
    1. *2: for 1GR-FE

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

    Standard Resistance:
    for 1KD-FTV
    Tester Connection
    		Condition
    		Specified Condition
    E4-2 (THWO) - A16-8 (TW)
    		Always
    		Below 1 Ω
    for 1GR-FE
    Tester Connection
    		Condition
    		Specified Condition
    E13-14 (THWO) - A16-8 (TW)
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Toyota Fortuner RM0000012KH002X.html)