Were is abs module on 2004 vw passat - 2004 Volkswagen Passat

SOURCE: 2004 VW passat not heating

COLD AIR WHEN IDLING COULD BE...
1) Low on coolant - the most common reason for this heater problem. Make sure your coolant level is full.
If the level is low, it could be because the radiator cap is not sealing well or it could also be a cracked overflow container (hot coolant that bleeds out of the engine and drops to the street so you never see the puddle on your driveway).

2) An air-lock in the coolant system - it needs to be burped. Park your car facing-up the steepest hill you can find. Remove the radiator cap a (be careful - best to do when engine is cold) and rev engine to 2000 RPM for 60 seconds - hopefully the air will burp out the cap. Top it off with 50/50 antifreeze.

3) A disconnected or cracked vacuum line. I've heard about this one but never investigated.

Marvin

• 85242 Answers
• Posted on Mar 23, 2009

SOURCE: 2002 vw passat wagon abs light on

this takes a dealer only scan tool to diagnose.

SOURCE: 2003 vw passat senstive abs

This is caused by excessive ABS sensor air gap. You might need to adjust the air gap on the speed sensor to the new cv shaft.

SOURCE: ABS/BRAKE warning lights always on in 2000 VW Passat

OKEY TRY TO GET A CODE WITH SCAN TOOL AND IF YOU CANNOT CONTACT WITH YOUR ECM YOU HAVE TO GET FIX YOUR ABS CONTROL UNIT.
BOSH ABS MODULE GIVES PROBLEM ON THAT MODELS I HAVE SAME PROBLEM WITH MY 1999 PASSAT V6 I SENDED MY PART TO GET FIX AND WAITING FOR THE COME BACK.
GOOD LUCK.
I DRAIN THE BRAKE FLUID FOR THE FIX LEAK FROM MY CALIPER AND I REMOVE THE ABS UNIT AND TAKE THE ELECTRONIC MODULE OUT AND SEND THE FOR THE REPAIR.

SOURCE: Brake/ABS/Traction lights on plus no AC

These problems do not seem to be related at all. The cause of the warm ac air could be several things from a low refrigerant charge to a plugged condensor fins to the compressor clutch not kicking in. You just have to follow a systematic approach when diagnosing these problems.