Ok so i have installed a new maf and still not getting any air g/s values. Only value that is shown is the air intake temperature, the same value that was shown with the old maf sensor. Cleared errors in the ECU but they returned once i started the car and engine light is on. Any tips how to check values with multimeter in the 5 pins of the maf connector?
Best regards, Rui de Lima.
MAF
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One question per topic.
No Gearbox questions
Diesel engine related problems
Think: Diesel engine, diesel fuel system, diesel injectors and glow plugs
One question per topic.
No Gearbox questions
Diesel engine related problems
Think: Diesel engine, diesel fuel system, diesel injectors and glow plugs
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My Name: Ozvtr
- Posts: 1199
- Joined: Wed Jul 10, 2019 3:31 am
- Model: C3 2002-2005, Original shape model
- Year: 2003 (53)
- Engine Size: 1.4 (8v)
- Fuel Type: Petrol
- Mileage: 80000
- Gearbox: Automatic PRND
- DPF: No
- LHD or RHD: RHD
- Engine name: TU3 (75 PS)
- Location: Brisbane, Australia.
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Wow, I've managed to find the worlds shitiest circuit diagram.
http://www.c3manuel.com/injection_allumage-151.html
Seeing as the airflow sensor and the temperature sensor are not making any sense I would say you are not getting any power to the MAF unit. The MAF appears to be item 1310 in the circuit diagrams. Pin 4 (I think it says pin4) seems to be the power pin. You can see it's power comes from the BSM but the fuse number is unreadable. See if there is power at pin4 (or any pin) with the engine running, if not check fuse and wiring to BSM. If there is power at pin4...well I don't know what to do then.
Hmm, item 1253 on the circuit diagram is your EGR valve, it shares power with the MAF. Pin 2 on the EGR valve is power. Is that the solenoid error code being that's being thrown up? Fuse at the BSM? Wiring from the BSM?
Coincidence? Problems with EGR and MAF? Cant win the lotto but..........
http://www.c3manuel.com/injection_allumage-151.html
Seeing as the airflow sensor and the temperature sensor are not making any sense I would say you are not getting any power to the MAF unit. The MAF appears to be item 1310 in the circuit diagrams. Pin 4 (I think it says pin4) seems to be the power pin. You can see it's power comes from the BSM but the fuse number is unreadable. See if there is power at pin4 (or any pin) with the engine running, if not check fuse and wiring to BSM. If there is power at pin4...well I don't know what to do then.
Hmm, item 1253 on the circuit diagram is your EGR valve, it shares power with the MAF. Pin 2 on the EGR valve is power. Is that the solenoid error code being that's being thrown up? Fuse at the BSM? Wiring from the BSM?
Coincidence? Problems with EGR and MAF? Cant win the lotto but..........
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My Name: C3CAR
- Posts: 2746
- Joined: Wed May 04, 2011 10:01 am
- Model: C3 2002-2005, Original shape model
- Year: 2002 (02)
- Engine Size: 1.4 (16v)
- Fuel Type: Diesel
- Mileage: 140000
- Gearbox: Manual 5 speed
- DPF: No
- LHD or RHD: RHD (UK)
- Engine name: DV4 16-valve diesel (90 PS)
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My Name: rukadesigns
- Posts: 14
- Joined: Sun Jan 14, 2018 10:05 pm
- Model: C3 2002-2005, Original shape model
- Year: 2004 (04)
- Engine Size: 1.4 (16v)
- Fuel Type: Diesel
- Mileage: 200000
- Gearbox: Manual 5 speed
- DPF: No
- LHD or RHD: LHD (Europe)
- Has thanked: 1 time
Hello all
One year later and im still having the same 0,0g air reading at the MAF. Ill have a week of holiday next in august and im willing to have a closer look to solve this problem. I want to track all the wires from the maf to the ECU, but i need some help.
Can someone confirm me which connector of the ECU (1, 2 or 3 from picture below) has the pins coming from the maf sensor? i couldnt figure out looking in the wiring diagram.
One year later and im still having the same 0,0g air reading at the MAF. Ill have a week of holiday next in august and im willing to have a closer look to solve this problem. I want to track all the wires from the maf to the ECU, but i need some help.
Can someone confirm me which connector of the ECU (1, 2 or 3 from picture below) has the pins coming from the maf sensor? i couldnt figure out looking in the wiring diagram.
- C3 ECU Plugs
- C3_ECU_PLUGS.jpeg (19.99 KiB) Viewed 247 times
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My Name: C3driver52
- Posts: 2012
- Joined: Sat Apr 30, 2011 7:40 pm
- Model: C3 2002-2005, Original shape model
- Year: 2003 (03)
- Engine Size: 1.4 i
- Fuel Type: Petrol
- Mileage: 79984
- Gearbox: Manual 5 speed
- DPF: No
- LHD or RHD: RHD (UK)
- Engine name: TU3 (75 PS)
- Has thanked: 146 times
- Been thanked: 78 times
Pull the plugs and find the 48 way brown plug at the ECU.
It's shown on the diagram
1 and 3 on your picture are 32 way, the central one is the one you are looking for and that is the only 48way of the three.
It's shown on the diagram
- Citroen C3 MAF to ECU wiring Diagram
1 and 3 on your picture are 32 way, the central one is the one you are looking for and that is the only 48way of the three.
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