No power to ac and engine cooling fan on.
Thread Starter
Newbie
Joined: May 2019
Posts: 8
Likes: 0
2008 gl320
No power to ac and engine cooling fan on.
Hi all..
I have a 2012 c200 w204.
Basically the car came to me after being elsewhere. It was parked for 1 week. Then owner said battery was flat so jump started it with booster pack. Noticed after a day or 2 the climate control is not powering up. Also the cooling fan come
S on full when engine's started. All fuses seem ok. I have a snapon scanner and the active codes are
1.engine communication with ac message missing.
2. Abs no can message from control unit n73 ignition lock control module.
3 rear sam heater coil for rear windshield heater has short to ground or open circuit.
4 reversible tensioning retractor front left.
Software error.
5 reversible tensioning retractor front right. Software error.
No other faults.
I'm not familiar with these cars as I usually work with trucks so any help appreciated. Thanks in advance.
I have a 2012 c200 w204.
Basically the car came to me after being elsewhere. It was parked for 1 week. Then owner said battery was flat so jump started it with booster pack. Noticed after a day or 2 the climate control is not powering up. Also the cooling fan come
S on full when engine's started. All fuses seem ok. I have a snapon scanner and the active codes are
1.engine communication with ac message missing.
2. Abs no can message from control unit n73 ignition lock control module.
3 rear sam heater coil for rear windshield heater has short to ground or open circuit.
4 reversible tensioning retractor front left.
Software error.
5 reversible tensioning retractor front right. Software error.
No other faults.
I'm not familiar with these cars as I usually work with trucks so any help appreciated. Thanks in advance.
Out Of Control!!
Joined: Apr 2019
Posts: 11,995
Likes: 6,827
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
troubleshooting 101
Hi all..
I have a 2012 c200 w204.
Basically the car came to me after being elsewhere. It was parked for 1 week. Then owner said battery was flat so jump started it with booster pack. Noticed after a day or 2 the climate control is not powering up. Also the cooling fan come
S on full when engine's started. All fuses seem ok. I have a snapon scanner and the active codes are
1.Engine communication with ac message missing.
2. Abs no can message from control unit n73 ignition lock control module.
3 rear sam heater coil for rear windshield heater has short to ground or open circuit.
4 reversible tensioning retractor front left.
Software error.
5 reversible tensioning retractor front right. Software error.
No other faults.
I'm not familiar with these cars as I usually work with trucks so any help appreciated. Thanks in advance.
I have a 2012 c200 w204.
Basically the car came to me after being elsewhere. It was parked for 1 week. Then owner said battery was flat so jump started it with booster pack. Noticed after a day or 2 the climate control is not powering up. Also the cooling fan come
S on full when engine's started. All fuses seem ok. I have a snapon scanner and the active codes are
1.Engine communication with ac message missing.
2. Abs no can message from control unit n73 ignition lock control module.
3 rear sam heater coil for rear windshield heater has short to ground or open circuit.
4 reversible tensioning retractor front left.
Software error.
5 reversible tensioning retractor front right. Software error.
No other faults.
I'm not familiar with these cars as I usually work with trucks so any help appreciated. Thanks in advance.
A/C is not in charge of fan module... it request the ECU to ramp up the fan speed.
As far as your DTC List No1 and 2 are of concern. Before you start chasing your tail, let's realize 90% chance these particular faults were caused by low voltage.
- Float or replace batteries
- reset all faults
- Rescan for fresh active faults.
At some point, work on high battery drain caused by CAN-B modules.
Thread Starter
Newbie
Joined: May 2019
Posts: 8
Likes: 0
2008 gl320
You have to sort things out a bit. The fan can run full speed if A/C circuit has a low charge. So read your refrigerant pressure.
A/C is not in charge of fan module... it request the ECU to ramp up the fan speed.
As far as your DTC List No1 and 2 are of concern. Before you start chasing your tail, let's realize 90% chance these particular faults were caused by low voltage.
At some point, work on high battery drain caused by CAN-B modules.
A/C is not in charge of fan module... it request the ECU to ramp up the fan speed.
As far as your DTC List No1 and 2 are of concern. Before you start chasing your tail, let's realize 90% chance these particular faults were caused by low voltage.
- Float or replace batteries
- reset all faults
- Rescan for fresh active faults.
At some point, work on high battery drain caused by CAN-B modules.
