Inspection Procedure

HINT:

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction (See FREEZE FRAME DATA ).

READ OUTPUT DTC

Connect the Techstream to the DTC3.
Turn the power switch on (IG) and turn the Techstream on.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Read the DTCs.

Result

RESULT REFERENCE

Display (DTC Output)	Proceed to
P0110	A
P0112	B
P0113	C

B: Go to step 5

C: Go to step 3

A: Go to next step

READ VALUE USING TECHSTREAM (INTAKE AIR TEMPERATURE)

Put the engine in inspection mode (See INSPECTION MODE PROCEDURE ).
Connect the Techstream to the DLC3.
Turn the Techstream on.
Enter the following menus: Powertrain / Engine and ECT / Data List / Intake Air.
Read the value displayed on the Techstream.

Standard:

Same as actual Intake Air Temperature (IAT).

Result

RESULT REFERENCE

Temperature Displayed	Proceed to
-40°C (-40°F)	A
140°C (284°F) or higher	B
Same as actual IAT	C

HINT:

If there is an open circuit, the Techstream indicates 40°C (-40°F).
If there is a short circuit, the 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 E42 Mass Air Flow (MAF) meter connector.
2. Connect terminals THA and E2 of the MAF meter wire harness side connector.
3. Connect the Techstream to the DLC3.
4. Turn the power switch on (IG).
5. Turn the Techstream on.
6. Enter the following menus: Powertrain / Engine and ECT / Data List / Intake Air.
7. Read the value displayed on the Techstream.
  Standard:
  
  140°C (284°F) or higher
8. Reconnect the MAF meter connector.
OK: CONFIRM GOOD CONNECTION TO SENSOR. IF OK, REPLACE MASS AIR FLOW METER

NG: Go to next step

CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM)

Disconnect the E42 MAF meter connector.
Disconnect the E83 ECM connector.

Measure the resistance.

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
THA (E42-4) - THA (E83-55)	Below 1 Ω
E2 (E42-5) - E3 (E83-97)	Below 1 Ω

Reconnect the MAF meter connector.
Reconnect the ECM connector.

Fig 2: Identifying E42 MAF Meter And E83 ECM Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

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

READ VALUE USING TECHSTREAM (CHECK FOR SHORT IN WIRE HARNESS)
1. Disconnect the E42 MAF meter connector.
2. Connect the Techstream to the DLC3.
3. Turn the power switch on (IG).
4. Turn the Techstream on.
5. Enter the following menus: Powertrain / Engine and ECT / Data List / Intake Air.
6. Read the value displayed on the Techstream.
  Standard:
  
  -40°C (-40°F)
7. Reconnect the MAF meter connector.
OK: REPLACE MASS AIR FLOW METER

NG: Go to next step

CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM)

Disconnect the E42 MAF meter connector.
Disconnect the E83 ECM connector.

Measure the resistance.

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
THA (E42-4) or THA (E83-5S) - Body ground	10 kΩ or higher

Reconnect the MAF meter connector.
Reconnect the ECM connector.

Fig 4: Identifying E42 MAF Meter And E83 ECM Connector Terminals

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE ECM