Inspection Procedure

HINT.

• When viewed from the rear of the engine assembly, Bank 1 is on the left side and Bank 2 is on the right side.
• If other DTCs relating to different systems that have terminal E2 as the ground terminal are output simultaneously, terminal E2 may have an open circuit
• Read freeze frame data using the intelligent tester or 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.

1. READ VALUE USING INTELLIGENT TESTER OR TECHSTREAM (INTAKE AIR TEMPERATURE) 
   1. Connect the intelligent tester or Techstream to the DLC3.
   2. Turn the power switch ON (IG).
   3. Turn the tester ON
   4. Enter the following menus:
      1. Intelligent tester - Select. DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / INTAKE AIR B1 or INTAKE AIR B2.
      2. Techstream - Select: Powertrain / Engine and ECT / Data List / All Data / Intake Air Bank 1 or Intake Air Bank 2.
   5. Read the value displayed on the tester.

      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 intelligent tester or Techstream indicates -40°C (-40°F)
      • If there is a short circuit, the intelligent tester or Techstream indicates 140°C (284°F) or higher.

   B:  Go to step  4

   C: CHECK FOR INTERMITTENT PROBLEMS  (See CHECK FOR INTERMITTENT PROBLEMS )

   A: Go to next step 

2. READ VALUE USING INTELLIGENT TESTER OR TECHSTREAM (CHECK FOR OPEN IN WIRE HARNESS) 
   1. Disconnect the E13 or E22 MAF meter connector.
   Fig 1: Identifying E13 Or E22 MAF Meter Connector Terminals
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Connect terminals THA and E2 or THAR and E2R of the MAF meter wire harness side connector.
   3. Connect the intelligent tester or Techstream to the DLC3
   4. Turn the power switch ON (IG)
   5. Turn the tester ON.
   6. Enter the following menus:
      1. Intelligent tester - Select DIAGNOSIS/ ENHANCED OBD II / DATA LIST / PRIMARY / INTAKE AIR B1 or INTAKE AIR B2.
      2. Techstream - Select. Powertrain / Engine and ECT / Data List / All Data / Intake Air Bank 1 or Intake Air Bank 2.
   7. Read the value displayed on the tester.

      Standard: 

      140°C (284°F) or higher 

   NG: Go to step 3 

   OK: CONFIRM GOOD CONNECTION TO SENSOR. IF OK, REPLACE MASS AIR FLOW METER  (See REMOVAL )

3. READ VALUE USING INTELLIGENT TESTER OR TECHSTREAM (CHECK FOR OPEN IN ECM) 
   1. Disconnect the E13 or E22 MAF meter connector.
   Fig 2: Identifying E13 Or E22 MAF Meter Connector Terminals
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Connect terminals THA and E2 or THA2 and E2 of the E1 ECM connector

      HINT:

      Before checking, do visual and contact pressure checks on the ECM connector.

   3. Connect the intelligent tester or Techstream to the DLC3
   4. Turn the power switch ON (IG).
   5. Turn the tester ON.
   6. Enter the following menus.
      1. Intelligent tester - Select- DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / INTAKE AIR B1 or INTAKE AIR B2.
      2. Techstream - Select. Powertrain / Engine and EGT / Data List / All Data / Intake Air Bank 1 or Intake Air Bank 2.
   7. Read the value displayed on the tester.

      Standard: 

      140°C (284°F) or higher 

   NG: CONFIRM GOOD CONNECTION TO ECM. IF OK, REPLACE ECM  (See REMOVAL )

   OK: REPAIR OR REPLACE HARNESS OR CONNECTOR 

4. READ VALUE USING INTELLIGENT TESTER OR TECHSTREAM (CHECK FOR SHORT IN WIRE HARNESS) 
   1. Disconnect the E13 or E22 MAF meter connector.
   Fig 3: Identifying E13 Or E22 MAF Meter Connector Terminals
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Connect the intelligent tester or Techstream to the DLC3.
   3. Turn the power switch ON (IG).
   4. Turn the tester ON
   5. Enter the following menus.
      1. Intelligent tester - Select: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / INTAKE AIR B1 or INTAKE AIR B2.
      2. Techstream - Select. Powertrain / Engine and ECT / Data List / All Data / Intake Air Bank 1 or Intake Air Bank 2
   6. Read the value displayed on the tester

      Standard: 

      -40°C (-40°F) 

   NG: Go to step 5 

   OK: REPLACE MASS AIR FLOW METER  (See REMOVAL )

5. READ VALUE USING INTELLIGENT TESTER OR TECHSTREAM (CHECK FOR SHORT IN ECM) 
   1. Disconnect the E13 or E22 MAF meter connector
   Fig 4: Identifying E13 Or E22 MAF Meter Connector And E1 ECM Connector Terminals
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Disconnect the E1 ECM connector
   3. Connect the intelligent tester or Techstream to the DLC3.
   4. Turn the power switch ON (IG).
   5. Turn the tester ON
   6. Enter the following menus:
      1. Intelligent tester - Select. DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / INTAKE AIR B1 or INTAKE AIR B2.
      2. Techstream - Select. Powertrain / Engine and ECT / Data List / All Data / Intake Air Bank 1 or Intake Air Bank 2.
   7. Read the value displayed on the tester.

      Standard: 

      -40°C (-40°F) 

   NG: REPLACE ECM  (See REMOVAL )

   OK: REPAIR OR REPLACE HARNESS OR CONNECTOR