A/C System - Inoperative/DTC P0550 Set/MIL ON
Bulletin No. 001/99Issued 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.
^ If the A/C system operates replace only the PSP switch terminal assembly.
Note
^ Replace only the terminal assembly. Do not replace the entire PSP switch.
3. Verify repair.
PART(S) INFORMATION
Part Number Description Qty. Notes
BC1D 32 234A Power Steering Pressure Switch 1 ---
Terminal Assembly
WARRANTY INFORMATION
Note
This information applies to verified customer complaints on vehicles covered under normal warranty. Refer to the SRT microfiche for warranty term information.
Warranty Type A
Symptom Code 6X
Damage Code 93
Part Number Main Cause BC1D 32 234A
Quantity 1
Operation Number / Labor Hours XX094XRX / 0.3 (terminal assembly replacement)
FOOO8XDX / 0.3 (diagnosis)