A/C - Inoperative/MIL ON/DTC P0550

Bulletin No: 07-005/09

Last Issued: 07/06/2009

Subject:
A/C INOPERATIVE/MIL "ON" DTC P0550





BULLETIN NOTE

APPLICABLE MODEL(S)VINS
1997-98 Protege with a "BP" or "Z5" engine and VINS lower than JM1 BC14**W0182001.

1996-97 Miata with VINS lower than JM1 NA35** V0739029.

NOTE:
1997 vehicles produced before 1/13/97 (Miata) and 3/1/97 (Protege) did not have the capacity for Diagnostic Trouble Code (DTC) P0550, however, the A/C inoperative condition is possible.

DESCRIPTION

Some vehicles may exhibit the (A/C) system inoperative with the Malfunction Indicator lamp (MIL) ON. This may be due the to Power Steering Pressure (PSP) switch terminal assembly becoming corroded causing the Power-train Control Module (PCM) to open the A/C relay circuit and set DTC P0550. A modified PSP switch terminal assembly is available to resolve this concern.

Customers having this concern should have their vehicle repaired using the following repair procedure.

REPAIR PROCEDURE

1. Verify customer concern.





2. Turn the A/C system ON and disconnect the PSP switch connector (A).

- If the A/C system does not function, refer to the workshop manual for troubleshooting information.

- If the A/C system operates, replace only the PSP switch terminal assembly (B).





NOTE:
^ Replace only the terminal assembly (B). Do not replace the entire PSP switch.

3. Verify repair.





PART(S) INFORMATION





WARRANTY INFORMATION

NOTE:
^ This warranty information applies only to verified customer complaints on vehicles eligible for warranty repair.

^ This repair will be covered under Mazda's New Vehicle Limited Warranty term for a Powertrain Component.

^ Diagnosis time does not apply to those vehicles that do not have the capacity for DTC P0550. See note under APPLICABLE MODEL(S)/VINS section of this bulletin.

^ Additional diagnostic time cannot be claimed for this repair.





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