Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Read freeze frame data using Techstream. Freeze frame data records the engine condition when malfunctions are detected. 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.

READ OUTPUT DTC

Connect Techstream to the DLC3.
Turn the ignition switch ON and turn Techstream ON.
Select the following menu items: Powertrain / Engine and ECT / Trouble Code.

Read DTCs.

Result

RESULT REFERENCE

Display (DTC Output)	Proceed to
P0115	A
P0117	B
P0118	C

B: Go to step 5

C: Go to step 3

A: Go to Next Step

READ VALUE USING TECHSTREAM (ENGINE COOLANT TEMPERATURE)

Connect Techstream to the DLC3.
Turn the ignition switch ON.
Turn the tester ON.
Select the following menu items: Powertrain / Engine and ECT / Data List / Coolant Temp.

Read the value displayed on the tester.

Standard value:

Between 80 C and 100 C (167 F and 212 F) with warm engine.

Result

TEMPERATURE SPECIFICATION

Temperature Displayed	Proceed To
-40°C (-40°F)	A
140C (284°F) or higher	B
Between 80C and 100°C (176°F and 212F)	C

HINT:

If there is an open circuit, Techstream indicates -40°C (-40°F).
If there is a short circuit, Techstream indicates 140°C (284°F) or higher.

B: Go to step 5

C: CHECK FOR INTERMITTENT PROBLEMS

A: Go to Next Step

READ VALUE USING TECHSTREAM (CHECK FOR OPEN IN WIRE HARNESS)
1. Disconnect the B4 Engine Coolant Temperature (ECT) sensor connector.
2. Connect terminals 1 and 2 of the ECT sensor connector on the wire harness side.
3. Connect Techstream to the DLC3.
4. Turn the ignition switch ON.
5. Turn the tester ON.
6. Select the following menu items: Powertrain / Engine and ECT / Data List / Coolant Temp.
7. Read the value displayed on the tester.
  Standard value:
  
  140°C (284°F) or higher.
8. Reconnect the ECT sensor connector.
OK: CONFIRM GOOD CONNECTION TO SENSOR. IF OK, REPLACE ENGINE COOLANT TEMPERATURE SENSOR

NG: Go to Next Step

CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR ECM)

Disconnect the B4 ECT sensor connector.

Fig 2: Identifying ECT Sensor And ECM Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the B30 ECM connector.

Measure the resistance.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connections	Specified Conditions
B4-2 (THW) - B30-97 (THW)	Below 1 Ω
B4-1 (E2) - B30-96 (ETHW)	Below 1 Ω

Reconnect the ECT sensor connector.
Reconnect the ECM connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GOOD CONNECTION TO ECM. IF OK, REPLACE ECM

READ VALUE USING TECHSTREAM (CHECK FOR SHORT IN WIRE HARNESS)
1. Disconnect the B4 ECT sensor connector.
  
  Fig 3: Identifying ECM Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect Techstream to the DLC3.
3. Turn the ignition switch ON.
4. Turn the tester ON.
5. Select the following menu items: Powertrain / Engine and ECT / Data List / Coolant Temp.
6. Read the value displayed on the tester.
  Standard value:
  
  -40°C (-40°F)
7. Reconnect the ECT sensor connector.
OK: REPLACE ENGINE COOLANT TEMPERATURE SENSOR

NG: Go to Next Step

CHECK HARNESS AND CONNECTOR (ENGINE COOLANT TEMPERATURE SENSOR ECM)

Disconnect the B4 ECT sensor connector.

Fig 4: Identifying ECT Sensor And ECM Connector Terminals

Disconnect the B30 ECM connector.

Measure the resistance.

Standard resistance

RESISTANCE SPECIFICATION

Tester Connections	Specified Conditions
B4-2 (THW) or B30-97 (THW) - Body ground	10 kΩ or higher

Reconnect the ECT sensor connector.
Reconnect the ECM connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE ECM