OBD1 Powertrain Control Module Components
From SaturnWiki
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Overview
The OBD1 PCM has two main boards, the larger of the two for engine functions, and the seperate board only present in Automatic Transmission PCMs.
| Part Number | Function |
| 16146451 | EPROM |
| 16126532 | |
| 16079435 | Custom misc. SPI I/O port, EST interface, P&H injector driver controller, some random signal buffers |
| 54995 | Custom limp home fuel controller chip. |
| 64606 | Serial Data Interface for ALDL 8192 BAUD |
| 84369 | |
| 34992 | Power Supply Controller |
| 34993 | IAC Driver |
| 16180566 | Fuel Pump Relay Driver |
| 34987 | O2 Sensor Amp |
| 35013 | Crystal |
| 42368 | Quad Driver (2) |
| 16129165 | Motorola 68HC11 Microprocessor and EEPROM (built-in) |
