Dtc 14 Engine Coolant Temperature Communication Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

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. SFI system
  2. Air conditioning amplifier assembly
  3. Harness or connector

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


INSPECTION PROCEDURE

1.CHECK FOR DTC (ENGINE CONTROL SYSTEM)

  1. Clear the DTCs.

    1. for 1KD-FTV: Toyota Fortuner RM0000012WY00RX.html.
    2. for 1GR-FE: Toyota Fortuner RM0000012WY00RX.html.

  1. Check the DTCs.

    1. for 1KD-FTV: Toyota Fortuner RM0000010E700LX.html.
    2. for 1GR-FE: Toyota Fortuner RM0000010E700LX.html.
    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 ECD SYSTEM (Toyota Fortuner RM0000012WB03QX.html)

C
GO TO SFI SYSTEM (Toyota Fortuner RM000000PD90QCX.html)
A


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

  1. Disconnect the A38 air conditioning amplifier assembly connector.

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

    1. *1: for 1KD-FTV
    2. *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
    A38-8 (TW) - E4-2 (THWO)
    		Always
    		Below 1 Ω
    A38-8 (TW) - Body ground
    		Always
    		10 kΩ or higher
    for 1GR-FE:
    Tester Connection
    		Condition
    		Specified Condition
    A38-8 (TW) - E13-14 (THWO)
    		Always
    		Below 1 Ω
    A38-8 (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 (Toyota Fortuner RM000001K3A018X.html)

C
REPAIR OR REPLACE HARNESS OR CONNECTOR
A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Toyota Fortuner RM0000045E300YX.html)