Powertrain Control Module (Except NAVAJO)
- 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.
- 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 |