Cold start problem 1.9 cdti edc16c39 Zafira

**miha99** · 10th July, 2013, 08:29 PM

I have a problem with Zafira 1.9 cdti (same as FIAT) ECU BOSCH 0281014452 EDC16C39.Cold start is very difficult.No faults in engine ECU,
warm start OK and motor run OK.Starter OK, Battery OK, I notice that car starts without any problem if I disconnect the temperature sensor.
Any help will be appriciated.

**morgano** · 10th July, 2013, 08:56 PM

Well, it seems temperature sensor is bad, try fitting another one.

**perovuk** · 10th July, 2013, 09:21 PM

I would first measure the compression on a cold engine

**ominimicu** · 10th July, 2013, 09:24 PM

you will se glow plug relay is connected to sensor temp info...
...long story short...replace sensor

**miha99** · 11th July, 2013, 09:42 AM

I put new temperature sensor and problem still remain.

**ominimicu** · 11th July, 2013, 10:10 AM

When cold...with sensor pluged, do you see the glow plug indicator on dash and glow realay working? i usually put a test lamp to one of the glow plugs. to check illumination.

**miha99** · 12th July, 2013, 08:08 AM

Obviously preheat is not a problem, because car starts immediatly if I disconnect the temperature sensor and then it is no need to wait any time for preheating.

**antibisic** · 12th July, 2013, 08:53 AM

Originally Posted by miha99

Obviously preheat is not a problem, because car starts immediatly if I disconnect the temperature sensor and then it is no need to wait any time for preheating.

Which temp is inside parameter in engine ecu when the car is cold?

**miha99** · 12th July, 2013, 04:02 PM

It is the same as AIR temperature, 20 - 30 degres when the engine is cold.

**flixuno** · 13th July, 2013, 07:53 PM

hi!
check with the multimeter between the two pins, with cold engine has to have about 2.8 volts at 20 degrees.
and 0.3 volts at 90 degrees.
edc16 the EDC15 and when the starter motor is in poor condition missing boot rpm.
rpm look good but not good
sorry for my English

**antibisic** · 13th July, 2013, 08:19 PM

Your problem is condition of starter,batery or motor because when you unplug temp sensor glow plug help engine to start and by this temp normally not need glow plug it start with compresion

**blazej1200** · 13th July, 2013, 10:00 PM

please check the compression on a cold engine

**miha99** · 16th July, 2013, 10:46 AM

Compression is on cold engine is OK, also no need to preheat when I disconnect temp. sensor motor start immediately! Loks like solution is cold start map in flash.
So I attach dump if anybody can point me to address of the map please.