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Home >> Mazda >> 1993 >> B2200 DX, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - EFI >> Computerized Engine Controls >> Powertrain Control Module (Except NAVAJO)
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Powertrain Control Module (Except NAVAJO)

  1. Locate Electronic Control Unit (ECU) or Powertrain Control Module (PCME). See ECU/PCME LOCATION table. Connect Engine Signal Monitor (49-9200-162) to ECU/PCME. See Fig 1 . Check voltage at each terminal of ECU/PCME. If input and output component voltage readings are not as specified, check faulty component. See PIN VOLTAGE CHARTS article, appropriate information in TESTS W/CODES article in the ENGINE PERFORMANCE section, and testing for appropriate component in this article.
  2. If input and output component voltages are as specified and ECU/PCME voltage is incorrect, replace ECU/PCME.
CAUTION: DO NOT apply voltage to terminals "A" and "B" of engine signal monitor. See Fig 1 .
ECU/PCME LOCATION

Application Location
B2200, B2600i, RX7 & 929 Behind Passenger Front Side Trim Panel
Miata & MPV Under Passenger Front Floor Mat
MX-3, Protege & 323 Behind Center Console
MX-6 & 626 Behind Center Console Top Cover
Fig 1: Testing Engine Control Unit (ECU)
G93D81128Courtesy of MAZDA MOTORS CORP.
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