Technical Do I need to get my ECU reprogrammed/repaired?
- Thread starter WildFeraligatr
- Start date
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Technical Do I need to get my ECU reprogrammed/repaired?
WildFeraligatr
Member
On the plug or the sensor itself?
Either way i tested the plug and the 2 sensors i have and neither showed continuity between the two center pins/wires
Ignition on and off
Battery disconnect
Sensor disconnected
Between pin 2 and 3 of the MAP sensor, is there a short. Middle pins
Battery disconnect
Sensor disconnected
Between pin 2 and 3 of the MAP sensor, is there a short. Middle pins
WildFeraligatr
Member
Again - the plug itself or the sensor that I disconnected from the throttle?
Plug
WildFeraligatr
Member
Right - with battery connected and with both ignition on AND off, there is no continuity.
Leave it unplugged
Ignition on
Black test lead on battery negative
Is it still 5V on the two centre pins of the map sensor
Ignition on
Black test lead on battery negative
Is it still 5V on the two centre pins of the map sensor
WildFeraligatr
Member
Yes
Great
Pink and black wire should be 0V
With the sensor connected
The sensor. Isn’t getting a 5V and a ground so can’t work, which is confirmed by the ambient temperature not working on the scan tool
Pink and black wire should be 0V
With the sensor connected
The sensor. Isn’t getting a 5V and a ground so can’t work, which is confirmed by the ambient temperature not working on the scan tool
WildFeraligatr
Member
Right - that's very strange as the wiring is completely intact and original so I can't understand what would have changed
Which colour wire is supposed to be the ground?
Which colour wire is supposed to be the ground?
Pink and black
WildFeraligatr
Member
And that's supposed to connect directly to the ECU?
WildFeraligatr
Member
No
Joins the green from the CAM sensor
It’s correct at the CAM sensor as tested earlier somewhere between the CAM and MAP it’s gained 5V
Probably physical damage If I was to hazard a guess I would look for two wires pinched together
Please don’t rewrite anything
Everything correct except you have 5V on the ground wire to the MAP sensor. Probably a screw pinching a wire
WildFeraligatr
Member
Right I just want to clarify a couple of things.
The pink and black wire on this car does not connect to the green wire on the cam. It connects directly to the ECU.
If the green wire on the cam sensor is meant to be the ground, is that meant to be reading 0v? Because if so, it is not, it is reading 5v.
The red and black wire from the MAP sensor ties in with the green wire from the cam sensor, both of which have 5V.
The pink and black wire on this car does not connect to the green wire on the cam. It connects directly to the ECU.
If the green wire on the cam sensor is meant to be the ground, is that meant to be reading 0v? Because if so, it is not, it is reading 5v.
The red and black wire from the MAP sensor ties in with the green wire from the cam sensor, both of which have 5V.
Let me double check
the 5V and ground are the wrong way round on the CAM sensors I suspect a typo on the diagram
I did expect green to ground
the 5V and ground are the wrong way round on the CAM sensors I suspect a typo on the diagram
I did expect green to ground
WildFeraligatr
Member
It does say green to ground on the diagram and white to +, which is why i labelled my diagram with the voltages taken at each wire.
Green is 5V on other models so looks like a typo
Should have picked it up earlier but was only looking for 0V and 5V on the outer pins
WildFeraligatr
Member
So is it fair to assume the white wire is the actual ground?
