Just to take the secondary air injection system out of the equation here, then unplug the pump, or just pull out the 2 relays in the diagrams below. The secondary air injection is only used to aid in Catalytic converter oxygen storage. But an ignition coil spiking on the ground circuit can affect vehicle speed sensors signal and cause a stall, I have seen it happen. I have also seen it happen to other sensors as well. The vehicle speed signal goes from the vehicle speed sensor directly to the PCM and the PCM then sends it to the Cluster. The VSS is a VR type sensor, so it generates an AC voltage signal and the PCM converts the pulsing voltage to vehicle speed. There is also 1 connector between the VSS and PCM on the 4wd model (C310 which I'll find). So either there is a connection issue where a wire is intermittently losing its signal, which I don't think is happening because the vehicle starts right back up. Another possibility is a cracked solder joint on the PCM board. From the OEM diagrams it looks like there should be a bias voltage on the VSS wire, but there are no vehicle speed sensor codes setting. The glitch on the Cluster is the clue here, it's not the cluster glitching, that wouldn't cause a stall, so it has to be something glitching the PCM.
The diagrams below, the 1st is just the relays for the Secondary Air injection system so you can pull them. That way we'll know it's nothing to do with the relays having a bad resistor or diode inside them,
OEM Diagrams 2, 3 are for the VSS.
And I added the Flow Chart for the P0410 so you can run through them later. The last diagram is the VSS operation. I will try to find this C310 connector so you can check the connector. But the Vehicle speed sensor is in the rear of the transmission reading the Output shaft speed. If there is something spiking the VSS ground, it will be hard to detect without a scope. But we'll check the wiring first, you can take a look at the VSS connector on the rear of the transmission for any corrosion or wiring issues.
I added the C310 connector location and the VSS location in the last 2 diagrams
Ive also added one more Ground location to check G107, can cause fuel pump to shut down as well as ignition. Its on the side of the engine block. Actually check all 4 Grounds at that location G108 G109 G110
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Monday, September 11th, 2023 AT 1:06 PM