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Home >> Mazda >> 1994 >> 929 >> Repair and Diagnosis >> External Pages >> Different car >> Section 48 (Engine Controls - System/Component Tests) >> Computerized Engine Controls >> Powertrain Control Module
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Powertrain Control Module

WARNING: This page is about a different car, the 1994 Mazda MX-6 and 1994 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
  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 G - TESTS W/ CODES article below, 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
MX-6 & 626 Behind Center Console Top Cover
Fig 1: Testing Engine Control Unit (ECU)
G93D81128Courtesy of MAZDA MOTORS CORP.
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