Ignition System - MIL ON/Misfire DTC's Set
ENGINEEG008-04
Title:
M.I.L. "ON" IMZ-FE ENGINE MISFIRE
DTC P0300, P0301, P0302, P0303,
P0304, P0305 OR P0306
Models:
Applicable Avalon, Camry, Sienna & Solara
April 28, 2004
Introduction
Some vehicles equipped with 1MZ-FE (V6) engines without VVTi may exhibit a rough idle and/or a M.l.L. ON" condition with a diagnostic trouble code or codes for misfire caused by an improperly operating ignition coil assembly. Production changes have been implemented to prevent this condition from occuring.
Applicable Vehicles
^ 2001 model year Japan built Camry vehicles equipped with 1MZ-FE engines ("6).
^ 1998-2001 model year North American built Camry vehicles equipped with 1MZ-FE engines ("6)
^ 1998 - 1999 model year Avalon vehicles.
^ 1998 - 2000 model year Sienna vehicles.
^ 1999 - 2002 model year Solara vehicles equipped with 1MZ-FE engines produced BEFORE the Production Change Effective VIN shown below.
Production Change Information
Warranty Information
Applicable Warranty:
This repair is covered under the Toyota Federal Emissions Warranty. This warranty is in effect for 36 months or 36,000 miles, whichever occurs first, from the vehicle's in-service date.
For California specification vehicles registered and operated in California, Maine, Massachusetts or Vermont, this repair is covered under the California Emissions Warranty, which is in effect for 36 months or 50,000 miles, whichever occurs first, from the vehicle's in-service date.
* Warranty application is limited to correction of a problem based upon a customer's specific complaint.
Parts Information
Required SSTs
Required Tools & Material
Repair Procedure
1. Confirm if vehicle is currently misfiring, running rough or hesitating.
If YES - Go to Step 2.
If NO - Review Freeze Frame Data and attempt to operate vehicle under similar driving conditions - see notes below for information that makes it more likely to duplicate misfire.
NOTE:
The following activities will turn off misfire detection:
^ Changing engine RPM greater than 150 RPM.
^ Changing throttle position quickly.
Misfire duplication can be duplicated most readily when the engine speed and throttle angle are held nearly constant for at least 2 minutes.
2. Confirm if misfire is currently occurring on cylinder(s) identified by DTC(s) using the Diagnostic Tester while engine is idling (see below).
Is the cylinder(s) identified by the DTC(s) misfiring?
If YES - Go to Step 3.
If NO - Follow normal diagnostics for applicable DTC in Technical Information System
(TIS) in applicable Repair Manual: Diagnostics: SFI: P030 #.
3. Swap suspect ignition coil(s) from cylinder that is misfiring to cylinder that is not misfiring.
4. Using Diagnostic Tester, confirm that misfire is now occurring in cylinder that has suspect ignition coil(s). Has misfire followed swapped ignition coil(s)?
If YES - Replace ignition coil(s) and go to Step 5.
If NO - Follow normal diagnostics in Technical Information System (TIS) for applicable Repair Manual: Diagnostics: SFI: P030 #.
5. Confirm misfire has been eliminated (0% at all times) using Diagnostic Tester while engine is idling.
NOTE:
If misfire percent is any value other than 0% at any time, then that cylinder is misfiring.