Matrix XR 2WD L4-1.8L (1ZZ-FE) (2003)
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Required Tools & Equipment
Inspection Procedure
The vehicle MUST be diagnosed following a cold soak. If the vehicle is at operating temperature, the condition will NOT be present.
1.
Monitor the following Data List parameter: Short FT # 1 (Short Term Fuel Trim for Bank 1).
Using TIS techstream, select:
Connect to Vehicle/Engine and ECT/Data List/Short FT # 1.
2.
Following conventional diagnostic procedure, confirm if there is a leak where the intake manifold and cylinder head meet between each intake
runner.
3.
Did the short term fuel trim change to a rich reading (negative fuel trim) in step 2?
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If YES - Replace the intake manifold gasket.
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If NO - Check for other vacuum leaks or lean running conditions per the Technical Information System (TIS).
Repair Procedure
1.
Drain the engine coolant. Refer to TIS:
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2003 or 2004 model year Corolla Repair Manual, Engine/Hybrid System - Cooling - "Coolant: Replacement"
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2005 model year Corolla Repair Manual, Engine/Hybrid System - Cooling - "Engine Coolant (1ZZ-FE): Replacement"
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2006, 2007, or 2008 model year Corolla Repair Manual, Engine/Hybrid System - Cooling - "1ZZ-FE Cooling: Coolant: On-Vehicle
Inspection"
2.
Remove the air cleaner hose No.1.
A.
Disconnect the VSV connector.
