engine overheat MAZDA MX-5 1994 Workshop Manual

TROUBLESHOOTING GUIDE TEP 27 INSPECTION KNOCKING ACTION 30 to next step TROUBLESHOOTING HINTS] > AirIFuel mixture too lean @I Incorrect ignition timing (too advance) Fuel injection amount incorrect Q Overheating Fuel line pressure decreases while accelerating @I Carbon deposits in engine :heck if "00" is displayed on Self-Diagnosis Check- br with ignition switch ON page F-79 Yes Diagnostic Trouble Code No. displayed Check for cause (Refer to specified check sequence) page F-81 "88" flashes Check PCME terminal 1 E voltage uzf page F-145 Specification: Battery positive voltage (Ignition switch ON) 0 If OK, replace PCME page 6143 s If not OK, check wiring between PCME and Self-Diagno- sis Checker page F-7 >heck switches for correct operation with Self- liagnosis Checker Monitor Lamp and ignition ;witch ON as page F-95 SELECT SW A Yes - No Go to next step Lamp not ONIOFF with specified switch Check for cause (Refer to specified check sequence) page F-96 MONl LAMP II- SYSTEM SELECT 1 Lamp always ON Check wiring between PCME terminal 1 D and Self-Diag- nosis Checker uzf page F-7 Zheck if PCME terminal voltages are OK :1R, IT, 2D, 20, and 2Q) page F-146 Yes Go to next step Check for cause (Refer to "Check Point for Each Termi- nal") uzf page F-148 Sheck for correct intake manifold vacuum at idle Yes - No Go to next step Vacuum: More than 450 mmHg (17.7 InHg) VACUUM GAUGE Check for air leakage of intake air system components as page F-100 Check if air cleaner element is clean page F-76 Yes - No Go to next step Replace air cleaner element page F-99 Gartner Banana

K TROUBLESHOOTING Hydraulic Electronic control Prelimi- control Powertrain system "8' svstem rieference page I I \dd I Vehicle does not move in D, S, L, or R range iccelerating Vehicle moves in N range Excessive creep Not creep at all No shift 0 0 Abnormal shift sequence 0 0 Frequent shifting 0 Shifting Excessivelv hiah or low shift point 0 0 . - No lockup I No kickdown l0k I - 1 Engine runaway or slip when \,I starting vehicle- V Slipping Engine runaway or slip when up- I I I or downshifting I I ] Excessive N to D or N to R shift 1,1 shock w I change in range I Transmission noisy in N or P Noise range Transmission noisy in D, S, L, or I 1 I R ranae I I Other .. - - ( No engine braking I Transmission overheats I I White smoke discharged from exhaust Engine will not start 10 1 Gartner Banana