Exhaust Valve Relay Module Test
High speed operation test:
- Disconnect exhaust valve actuator connector from relay module
- Start and run engine at idle
- Set multimeter to DC volts, check voltage with red meter lead to pin 4 and black meter lead to pin 1. Result should be 12 VDC
EMM Outputs to Relay Module:
- Use back-probe to obtain results at engine harness connector
- Start and run engine
- Use the Evinrude Diagnostics software Monitor screen to observe exhaust valve position indicator
High / Low speed operation test:
- Advance throttle until TPS exceeds 2 to 5%
- Observe Monitor screen for Exhaust Valve Indicator to switch LOW
- Check voltage with red meter lead to pin 2 (red wire), black meter lead to pin 4 (orange/red). Result should be 12 VDC
If results are correct, the problem is in actuator or linkage. If results are not correct, refer to EMM Outputs to Relay Module Test.
Engine Monitor Screen
- Supply voltage: Check for voltage, red meter lead to pin 1, black meter lead to pin 2. Result should be 12 VDC.
- High speed mode: Check for voltage, red meter lead to pin 4, black meter lead to pin 2. Result should be 12 VDC.
- Low speed mode: Check for voltage, red meter lead to pin 4, black meter lead to pin 3. Result should be no / low voltage. Increase engine rpm and observe Monitor screen for Exhaust Valve Indicator to switch LOW. When indicator switches LOW, result should be 12 VDC.
If results are correct, replace Relay Module. If results are not correct, check engine electrical harness before replacing EMM.
