Engine Controls - Mode 6 Thermostat Monitor Information
Bulletin No.: 01/023/08Last Issued: 4/4/2008
Subject:
MODE 6 THERMOSTAT MONITOR BELOW LOWER TEST LIMIT
APPLICABLE MODEL(S)/VINs
2006 Mazda3 with VINs lower than JM1BK******600001
2006 Mazda5 with VINs lower than JM1CR******129846
2006 MAZDASPEED6 with VINs lower than JM1GG******108052
2006 MX-5 with VINs lower than JM1NC******121032
2006 RX-8 with VINs lower than JM1FE******207002
2006-2007 Mazda6 3.0L built before November 10, 2006
DESCRIPTION
In rare cases, the Mode 6 On-Board test results may show the thermostat monitor below the lower test limit even though diagnostic procedures indicate the thermostat is operating normally. As a mass-production change, the PCM calibration has been changed.
For detailed Mode 6 On-Board test results, refer to the appropriate Workshop Manual section 01-02 - DIAGNOSTIC MONITORING TEST RESULTS ACCESS PROCEDURE.
If this condition is present, the vehicle's on-board diagnostic functions will continue to operate properly and there is no impact on exhaust emission or driveability. As a result, no repair is planned for this concern.
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