Toyota Camry 3.5 Firmware 89663-06Q31: Engine Calibration and Stage 2 Variants

89663-06Q31 is an engine-control calibration associated in the catalog with the Toyota Camry 3.5 and its 2GR-FKS V6. It belongs to the engine control module identified as 89661-0X611, which manages engine operation, including fuel delivery, ignition and emissions-related controls.

The complete calibration identifier matters here. The 89663 number identifies the software calibration, while 89661-0X611 identifies the associated controller in these filenames. Together with the Camry and engine labels, they distinguish this entry from other Toyota calibrations with similar prefixes. The filenames do not establish a model year or a complete vehicle fitment list.

Stage 2 and emissions-related labels

All three catalog filenames describe Stage 2 variants rather than an identified stock file. Stage 2 is a modified-tuning label, but it does not by itself specify the changes to torque, power or drivability.

The file labeled STAGE2_E2 FULL also carries an E2 Full designation. The catalog does not define that designation, so its specific calibration changes cannot be established from the filename alone.

The separate STAGE2_E2 FULL_EVAP OFF file names an EVAP Off modification. The evaporative emissions system normally manages fuel vapor from the tank and routes it to the engine to be burned. The label indicates a modification related to that system, but it does not describe exactly which functions or diagnostics were changed. It appears only on this filename, not on the other E2 Full or Stage 2 entries.

What the verification labels mean

Each filename includes CVN OK and CRC OK. These are catalog labels referring to calibration verification and checksum status. They do not identify the tuning changes or establish emissions compliance.