Greetings everyone, Show I bought a 2018 Mazda CX-5 Grand Touring AWD with 18K miles, that was involved in a minor accident. There were no starting issues for about a month until recently; it won't crank or start, only ignition comes on. In normal starting condition, the push button illuminates in green when ready to fire up the engine. In my case, there is no communication between the keyfob and he computer as the button lights up in blinking orange when I depress the brake pedal, the shifter is stuck in Park, and the "Keyless system malfunction" error lights up in the dash. In addition, the last 3 times it started, I had the serpentine belt removed, so I received the charging system malfunction since the alternator wasn't charging the battery, as expected. Now that it's having starting issues, I still see the same malfunction warning "Charging system malfunction. Stop vehicle immediately in a safe place", as if the engine is running, but obviously it is not. This malfunction error pops up when the ignition is on. This, to me, indicates that 1) it thinks the engine is running as there is no other way for the computer to check if the alternator is charging the battery unless the pulley is spinning. 2) The malfunction is stored from last time it started even though I disconnected the battery several times. Here is what I tried so far: As I am looking into the starting system and testing all components individually, I wanted to make sure that the PCM is in working order. I hooked up a regular $30 OBD code reader, but it won't communicate with the vehicle. It says linking error, which I believe is a generic error for no communication with the PCM? I have watched several videos of ScannerDanner about similar issues and I tried the 5v reference from the MAF sensor; I get 0.1 and 0.0 volts and 0.0 in all three pins. I scoured the service manual to pull the schematics for the PCM but can't find it. I wanted to test the PCM for power and ground. It has two connectors and I just checked pin by pin until I found the harness that's coming from the fuse box reading 12v in 2 different pins, and 1 ground. I am not sure if I am testing the right pins and if this is an indication that the PCM is receiving power as it should and just not outputting anything. Sorry for the lengthy post, I just wanted to share as much information as possible. Any help on PCM diagnosis would be appreciated! Thank you!! - Dean Last edit: 17 Jan 2021 09:46 by vallis. Close Get back on the road
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Mazda CX-5 Symptoms
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Why does my Mazda cx5 wont start?The most common reasons a Mazda CX-5 won't start are a dead battery, an alternator problem, or failed starter.
How do you force start a Mazda cx5?If this occurs, the engine can be force-started. Press and hold the push button start until the engine starts. Other procedures necessary for starting the engine such as having the key in the cabin, and depressing the clutch pedal (manual transaxle) or the brake pedal (automatic transaxle) are required.
Why is my Mazda not starting?The most common reasons a Mazda 3 won't start are a dead battery, an alternator problem, or failed starter.
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Mazda cx 5 won t start
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