Engine Control - MIL ON, Misfire DTCs Stored
ENGINEEG005-04
Title:
M.I.L. "ON" ENGINE MISFIRE DTC
P0300, P0301, P0302, P0303, P0304,
P0305 OR P0306
Models:
'04 Camry, Sienna and Solara
April 12, 2004
Introduction
Some 2004 model year Camry, Sienna and Solara vehicles equipped with the 3MZ-FE V6 engine may exhibit a M.I.L. "ON" condition with one of the following Diagnostic Trouble Codes stored as a result of ignition coil manufacturing issues:
^ P0300 (Multiple/Random Misfire).
^ P0301 (Misfire # 1 Cylinder).
^ P0302 (Misfire # 2 Cylinder).
^ P0303 (Misfire # 3 Cylinder).
^ P0304 (Misfire # 4 Cylinder).
^ P0305 (Misfire # 5 Cylinder).
^ P0306 (Misfire # 6 Cylinder).
Applicable Vehicles
^ 2004 model year Camry, Sienna and Solara vehicles equipped with 3MZ-FE engines produced BEFORE the Production Change Effective VINs 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 note 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 DTC identified cylinder misfiring?
If YES - Go to Step 3.
If NO - Follow normal diagnostics for applicable DTC in the Technical Information
System (TIS) in applicable 2004 model year Repair Manual: Diagnostics: SFI: P030 #.
3. Swap suspect ignition coil(s) from cylinder that is misfiring to cylinder that is not misfiring.
4. Confirm using Diagnostic Tester 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 TIS for applicable 2004 model year 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 % is any value other than 0% at any time then that cylinder is misfiring.