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P2 link to ECU PEM 8634953 control waveforms for fuel delivery troubleshooting

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Volvo Repair Database P2 link to ECU PEM 8634953 control waveforms for fuel delivery troubleshooting

Post by abscate » Sat Mar 10, 2018 5:33 am

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Re: P2 link to ECU PEM control waveforms for fuel delivery troubleshooting

Post by mrbrian200 » Sat Mar 10, 2018 1:06 pm

That's awesome. I've always been somewhat perplexed why the PEM wasn't designed to communicate over CAN to monitor ECU duty cycle input and pump PWM control /supply voltages and report basic faults. When you open the thing up the board certainly appears to be far more complex than what, quite frankly, need merely be a relatively simple solid state PWM current signal relay. I find it interesting that Bosch/Ford/Volvo designed this critical system so that proper diagnostics in every single case requires aftermarket tools as the DICE units don't have external probe/scope functions.

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