Sfi System - P0118(2006/01 - 2010/08)

Brand:

Toyota

Model Name:

Camry ACV40 GSV40

Manual:

Repair Manual

Section:

2Az-Fe Engine Control System

Title:

Sfi System

  1. Description

  2. Wiring diagram

  3. Inspection procedure

  4. Read value using intelligent tester (engine coolant temperature)

  5. Read value using intelligent tester (check for open in wire harness)

  6. Check harness and connector (engine coolant temperature sensor - ecm)

  7. Read value using intelligent tester (check for short in wire harness)

  8. Check harness and connector (engine coolant temperature sensor - ecm)

DTC P0115 Engine Coolant Temperature Circuit Malfunction

DTC P0117 Engine Coolant Temperature Circuit Low Input

DTC P0118 Engine Coolant Temperature Circuit High Input


​

DESCRIPTION

A thermistor, whose resistance value varies according to the ECT, is built into the Engine Coolant Temperature (ECT) sensor.
The structure of the sensor and its connection to the ECM are the same as those of the Intake Air Temperature (IAT) sensor.
HINT:
When any of DTCs P0115, P0117 and P0118 are set, the ECM enters fail-safe mode. During fail-safe mode, the ECT is estimated to be 80°C (176°F) by the ECM. Fail-safe mode continues until a pass condition is detected.

DTC No.
Proceed to
DTC Detection Condition
Trouble Area
P0115
Step 1
Open or short in ECT sensor circuit for 0.5 seconds (1 trip detection logic)
  1. Open or short in ECT sensor circuit
  1. ECT sensor
  1. ECM
P0117
Step 4
Short in ECT sensor circuit for 0.5 seconds (1 trip detection logic)
  1. Short in ECT sensor circuit
  1. ECT sensor
  1. ECM
P0118
Step 2
Open in ECT sensor circuit for 0.5 seconds (1 trip detection logic)
  1. Open in ECT sensor circuit
  1. ECT sensor
  1. ECM
HINT:
When any of these DTCs are set, check the ECT by selecting the following menu items on the intelligent tester: Powertrain / Engine and ECT / Data List / Coolant Temp.

Temperature Displayed
Malfunction
-40°C (-40°F)
Open circuit
140°C (284°F) or higher
Short circuit

WIRING DIAGRAM


Connect the intelligent tester to the DLC3. Camry


INSPECTION PROCEDURE

HINT:
Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
1.READ VALUE USING INTELLIGENT TESTER (ENGINE COOLANT TEMPERATURE)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to the ON position and turn the tester on.

  1. Select the following menu items: Powertrain / Engine and ECT / Data List / Coolant Temp.

  1. Read the value displayed on the tester.

    Standard:
    Between 80°C and 100°C (176°F and 212°F) with warm engine.
    Result:
    Temperature Displayed
    		Proceed to
    -40°C (-40°F)
    		A
    140°C (284°F) or higher
    		B
    Between 80°C and 100°C (176°F and 212°F)
    		C
    HINT:
    1. If there is an open circuit, the intelligent tester indicates -40°C (-40°F).
    1. If there is a short circuit, the intelligent tester indicates 140°C (284°F) or higher.


Bnext
Go to step 4

Cnext
CHECK FOR INTERMITTENT PROBLEMS
A
next down

2.READ VALUE USING INTELLIGENT TESTER (CHECK FOR OPEN IN WIRE HARNESS)
  1. Disconnect the C4 Engine Coolant Temperature (ECT) sensor connector. Camry

  2. Disconnect the C4 Engine Coolant Temperature (ECT) sensor connector.

  1. Connect terminals 1 and 2 of the ECT sensor connector on the wire harness side.

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to the ON position and turn the tester on.

  1. Select the following menu items: Powertrain / Engine and ECT / Data List / Coolant Temp.

  1. Read the value displayed on the tester.

    Standard:
    140°C (284°F) or higher.

  1. Reconnect the ECT sensor connector.



NGnext
Go to step 3
OK
next down
CONFIRM GOOD CONNECTION TO SENSOR. IF OK, REPLACE ENGINE COOLANT TEMPERATURE SENSOR

3.CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM)
  1. Disconnect the C4 ECT sensor connector. Camry

  2. Disconnect the C4 ECT sensor connector.

  1. Disconnect the C24 ECM connector.

  1. Measure the resistance between the terminals of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    THW (C4-2) - THW (C24-97)
    		Below 1 Ω
    E2 (C4-1) - ETHW (C24-96)

  1. Reconnect the ECT sensor connector.

  1. Reconnect the ECM connector.



NGnext
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
next down
CONFIRM GOOD CONNECTION TO ECM. IF OK, REPLACE ECM

4.READ VALUE USING INTELLIGENT TESTER (CHECK FOR SHORT IN WIRE HARNESS)
  1. Disconnect the C4 ECT sensor connector. Camry

  2. Disconnect the C4 ECT sensor connector.

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to the ON position and turn the tester on.

  1. Select the following menu items: Powertrain / Engine and ECT / Data List / Coolant Temp.

  1. Read the value displayed on the tester.

    Standard:
    -40°C (-40°F)

  1. Reconnect the ECT sensor connector.



NGnext
Go to step 5
OK
next down
REPLACE ENGINE COOLANT TEMPERATURE SENSOR

5.CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR - ECM)
  1. Disconnect the C4 ECT sensor connector. Camry

  2. Disconnect the C4 ECT sensor connector.

  1. Disconnect the C24 ECM connector.

  1. Measure the resistance between the terminals of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    THW (C4-2) or THW (C24-97) - Body ground
    		10 kΩ or higher

  1. Reconnect the ECT sensor connector.

  1. Reconnect the ECM connector.



NGnext
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
next down
REPLACE ECM