If you have a scan tool, command the PCM to perform the actuator test mode to test the ignition coils.
Next, use a digital meter to check the voltage output at the body control module form the ignition switch. With the key out, you should see 4.6 volts, key in 4.6 volts, accessory position 3.2 volts, unlock 2.2 volts, run 1.12 volts, start 0.41 volts.
If you’re not seeing those voltages, then the BCM will not send the proper digital message to the PCM and the main computer will not know the engine is cranking. So it will set the trouble codes P0351, P0352, P0353, when in fact the problem lies in the ignition switch. The fix is to replace the ignition switch if the voltages aren’t correct.

For more information on this repair or any others for your vehicle, buy an online subscription to either Alldatadiy.com or eautorepair.net. Click on this link to compare the two services: Compare Alldata and Eautorepair.
If you just need information for a single repair and want to save money,eautorepair offers a lower price 1-week subscription for only $11.99. Or, if you’ll be working on this vehicle in the future, you can buy a 1-year subscription (Alldatadiy.com for $26.99, or eautorepair.net $29.99)

© 2012 Rick Muscoplat

Alldata and Eautorepair are both professional grade shop manuals. You’ll find more in-depth information and more complete wiring diagrams, along with descriptions of how the systems work. And, you’ll get all that at a price you can afford. Check them out!

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