2000 Mazda B2500 SX, AutomaticFACTORY OEM SERVICE PROCEDURE

General Test Index: Notes

GENERAL TEST INDEX

NO. NAME TEST ACTION
1 VREF Used to diagnose VREF supply malfunctions. See TEST 1: VEHICLE REFERENCE VOLTAGE (VREF) .
2 CTO Used to diagnose Clean Tachometer Output malfunctions. See TEST 2: TACHOMETER OUTPUT (CTO) FAILURE .
3 MIL Used to diagnose MIL malfunctions. See TEST 3: MALFUNCTION INDICATOR LAMP (MIL) .
4 Intermittent Used to diagnose intermittent concerns. See TEST 4: INTERMITTENT .
5 Fuel Delivery Used to diagnose fuel delivery concerns. See TEST 5: FUEL DELIVERY SYSTEM .
6 PCV Used to diagnose PCV system. See TEST 6: POSITIVE CRANKCASE VENTILATION (PCV) SYSTEM .
7 EEC Power Relay Used to diagnose Electronic Engine Control Power Relay failure. See TEST 7: PCM POWER RELAY .
8 CKP Used to diagnose CKP sensor, harness and PCM malfunctions. See TEST 8: CRANKSHAFT POSITION (CKP) SENSOR .
9 Fuel Pressure Regulator Used to diagnose fuel pressure regulator function. See TEST 9: FUEL PRESSURE REGULATOR . .
10 Fuel Pump Inspection Used to diagnose fuel pump function. See TEST 10: FUEL PUMP INSPECTION .
11 Fuel Pressure Inspection Used to diagnose fuel line pressure and pressure hold. See TEST 11: FUEL LINE PRESSURE / FUEL PRESSURE HOLD INSPECTION .
12 Fuel Injector Inspection Used to diagnose fuel injector concerns. See TEST 12: FUEL INJECTOR INSPECTION .
13 EGR Used to diagnose EGR valve. See TEST 13: EGR VALVE .
14 EGRVR Used to diagnose EGRVR solenoid. See TEST 14: EGRVR (EGRVR) SOLENOID INSPECTION .
15 DPFE Used to diagnose Differential Pressure Feedback EGR sensor. See TEST 15: DIFFERENTIAL PRESSURE FEEDBACK EGR (DPFEGR) SENSOR .
16 No Start Used to diagnose No Start condition. See TEST 16: NO START .
17 Ignition Scope Test Used to diagnose ignition coil malfunction and misfires. See TEST 17: IGNITION SCOPE TEST .
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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