MX-5 Miata L4-1.8L DOHC (1996)
Power Steering Pressure Switch: Customer Interest
A/C System - Inoperative/DTC P0550 Set/MIL ON
Bulletin No. 001/99
Issued 04/08/99
Revised
Section
U (07)
Applicable Model/s
1995-98 Protege
1996-97 Miata
Subject
A/C INOPERATIVE - P/S PRESSURE SWITCH
TERMINAL ASSEMBLY CORRODED
APPLICABLE MODEL(S)/VINS
1995-98 Protege with a "BP" or "Z5" engine and VINs lower than JM1 BC14** W0182001.
1996-97 Miata with VINs lower than JM1 NA35** V0739029.
DESCRIPTION
Some vehicles may exhibit the air conditioning (A/C) system inoperative with the Malfunction Indicator lamp (MIL) ON. This may be due to the Power
Steering Pressure (PSP) switch terminal assembly becoming corroded causing the Powertrain Control Module (PCM) to open the A/C relay circuit and
set Diagnostic Trouble Code (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 procedure.
REPAIR PROCEDURE
1.
Verify customer concern.
2.
Turn the A/C system ON and disconnect the PSP switch.
^
If the A/C system does not function refer to the Workshop Manual for troubleshooting and repair information.
