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Audi A3 1.8 AGU - Code 04FC hydraulic pump signal not in range - Fixed #

Posted by Mike Burgess on November 19, 2012, 9:37 am

Year of Manufacture *: 1997
( Optional ) Engine Code or CC: 1.8 AGU

Hi

I have an Audi A3 hatchback in with a fault code of 04FC. Hydraulic pump signal not in range. I have carried out checks on road speed sensors and found no faults. I can not do and actuator test on this model with my KTS or verus

Mike

Re: Audi A3 Fault code 04FC

Posted by Kevin Apps <iframe src='https://members4.boardhost.com/ukautotalk/info/user=UKAT2589' width='330' height='300' border=0 style='border:none;'> on November 19, 2012, 12:07 pm, in reply to "Audi A3 Fault code 04FC"
Kevin Apps

Mike.

I don,t use any snappy code reader,s but have you tried expert mode ? that is if verus has it.

Then it would give you a AVW code, then its easy to look on ross-tech wiki.

Kev.

Re: Audi A3 1.8 AGU - Code 04FC hydraulic pump signal not in range #

Posted by Darren Bamford <iframe src='https://members4.boardhost.com/ukautotalk/info/user=UKAT5465' width='330' height='300' border=0 style='border:none;'> on November 19, 2012, 7:37 pm, in reply to "Audi A3 1.8 AGU - Code 04FC hydraulic pump signal not in range #"

Hi Mike

Both of your diagnostic tools are displaying the DTC fault in HEX.

this converts to 01276 (VAG 5 digit code )

I would check the ABS fuses first. If the main fuse is blown , give the ABS pump a wack with a hammer and then replace the fuse.

Why did you waste time checking the wheel sensors? I cannot see the connection or logic.

Thats like saying the heater blower is not working , but I checked and tested the electric windows

01276 - ABS Hydraulic Pump (V64): Signal Outside Specifications

Possible Symptoms
Malfunction Indicator Light (MIL) ON

Possible Causes
ABS Hydraulic Pump (V64) Connector to Control Module faulty
Wiring and/or Connector(s) faulty
ABS Hydraulic Pump (V64) faulty
Brake Electronics Control Module (J104) faulty

Possible Solutions
Check ABS Hydraulic Pump (V64) Connector to Control Module
Check Wiring and/or Connector(s)
Check/Replace ABS Hydraulic Pump (V64)
Check/Replace Brake Electronics Control Module (J104)

HTH

Darren.

Re: Audi A3 1.8 AGU - Code 04FC hydraulic pump signal not in range #

Posted by Michael Burgess on November 19, 2012, 8:13 pm, in reply to "Re: Audi A3 1.8 AGU - Code 04FC hydraulic pump signal not in range #"
Message modified by board administrator November 20, 2012, 3:19 pm

Hi Darren, thanks for that information. When the vehicle first came in with the ABS light on, I found fault with near side rear road speed sensor. Replaced with new and rechecked operation and cleared all codes. Carried out road test and all was fine. Customer came and collected two days later, done 1 mile and light was back on. Checked with diagnostics and this time came back with 01276 code KTS system. When checked with Verus it was 04FC. I have checked the fuses across battery but I will remove them and recheck tomarrow.

Re: Audi A3 1.8 AGU - Code 04FC hydraulic pump signal not in range #

Posted by Mark Carter <iframe src='https://members4.boardhost.com/ukautotalk/info/user=UKAT1428' width='330' height='300' border=0 style='border:none;'> on November 19, 2012, 10:01 pm, in reply to "Re: Audi A3 1.8 AGU - Code 04FC hydraulic pump signal not in range #"
Mark Carter

Load test the feeds and grounds.

Replace the motor with a H4 bulb and see if the system will light it.

Mark

Modern cars, Its all wizardry and witchcraft

Re: Audi A3 1.8 AGU - Code 04FC hydraulic pump signal not in range #

Posted by Rob Nicholson <iframe src='https://members4.boardhost.com/ukautotalk/info/user=UKAT5122' width='330' height='300' border=0 style='border:none;'> on November 19, 2012, 10:12 pm, in reply to "Audi A3 1.8 AGU - Code 04FC hydraulic pump signal not in range #"

Mike

As Darren says you have a HEX code if you use the calculator in accesories on your PC select HEX put in your code in this case without the '0' so 4FC then select the 'Dec' (decimal) option and it converts to the decimal 1276 put the zero back at the front and you have the decimal number i.e. VAG 5 digit code.

The ABS ECU will pulse the ABS pump motor to check it, disconnect the plug work out which 2 pins are the motor and power probe them to check the pump motor fires up if not as suggested tap it

hth

Rob

Re: Audi A3 1.8 AGU - Code 04FC hydraulic pump signal not in range #

Posted by andyhyoung <iframe src='https://members4.boardhost.com/ukautotalk/info/user=UKAT5148' width='330' height='300' border=0 style='border:none;'> on November 20, 2012, 8:25 am, in reply to "Re: Audi A3 1.8 AGU - Code 04FC hydraulic pump signal not in range #"
Andrew Young

If this car is using ATE abs system,then I would strongly suspect that the solder joints are fractured on the pcb ,where the 2 pins for the pump motor are attached.Not too difficult to repair.

Fixed #

Posted by Mike Burgess on November 20, 2012, 8:26 pm, in reply to "Re: Audi A3 1.8 AGU - Code 04FC hydraulic pump signal not in range #"
Message modified by board administrator November 21, 2012, 1:14 pm

Hi. Thanks for all the information on this one. I have just finished doing the checks on it. I have removed, cleaned and checked the fuseable links. Cleaned and checked all three fuses (30A) on top of battery. Removed ABS electrical block connector, cleaned and sprayed with electrical cleaner. Refitted all parts and cleared out codes. Road tested vehicle for about 10 miles and system is now working fine. Many thanks FIXED.

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