Hi guys,
About a month ago my truck wouldn't start and I narrowed it down to blown up FICM. A month later I found a FICM and the truck starts right up, However I have a P0652 Sensor Reference Voltage B Circuit Low and the truck is in the limp mode. I've measures the reference voltage and it is low, it's 1.73V.
I've disconnected every sensor and the voltage doesn't change so i'm ruling out bad sensors. I've checked all the wire, there's no short that I can find, I actually went through the entire engine loom when I was troubleshooting the FICM so I know there's not bad wire anywhere that I know of. I even disconnected to two big connectors and checked all the wires for short to ground and nothing. I don't have the pin-out of the connectors so i can check for voltage coming out of the ECM up to there.
Is it really my luck that the ECM gave up the ghost when the FICM exploded? Any help is appreciated.
About a month ago my truck wouldn't start and I narrowed it down to blown up FICM. A month later I found a FICM and the truck starts right up, However I have a P0652 Sensor Reference Voltage B Circuit Low and the truck is in the limp mode. I've measures the reference voltage and it is low, it's 1.73V.
I've disconnected every sensor and the voltage doesn't change so i'm ruling out bad sensors. I've checked all the wire, there's no short that I can find, I actually went through the entire engine loom when I was troubleshooting the FICM so I know there's not bad wire anywhere that I know of. I even disconnected to two big connectors and checked all the wires for short to ground and nothing. I don't have the pin-out of the connectors so i can check for voltage coming out of the ECM up to there.
Is it really my luck that the ECM gave up the ghost when the FICM exploded? Any help is appreciated.
