Test 1 - Power Supply Check
- Disconnect MCU control terminals at MCU. Turn ignition on, and check for battery voltage at terminals 29 and 41. If battery voltage is present, go to step 2). If no voltage at terminals, check main relay, starter switch, fuses, fusible link and circuits.
- Check for continuity between terminals 38 and 39 and ground. If ohmmeter does not show continuity to ground, check ground connection, terminal ends and wires.