audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

All Technical Service Bulletins for Barometric Pressure Sensor:|259201|Page 3030 > < Customer Interest for Barometric Pressure Sensor:|259201|Page 3027
Page 1
background image

Barometric Pressure Sensor: All Technical Service Bulletins
Engine - Excessive Cranking Time, Stalls After Starting

Group:

25

Number:

92-01

Date:

01/31/92

Subject:
Vehicle Stalls After Starting and/or Excessive
Cranking Time Before Starting

Model(s):
80/90, 100 with CIS-E III   M.Y. 1987-1991

Condition:

Barometric Absolute Pressure Sensor (Altitude sensor) may cause differential pressure regulator current, to decrease in open loop mode.

Barometric Absolute Pressure Sensor Functional Check:

Requirement

^ Engine at operating temperature

Switch off ignition

Install VW 1315 A/1 test harness to differential pressure regulator Connect multimeter US 1119 or equivalent to VW 1315 A/1 and set to 2OmA scale.

Start engine and let idle

1.

Disconnect oxygen sensor

-  If differential current stabilizes at zero, the Barometric Absolute Pressure Sensor is OK (Refer to other Technical Bulletin and/or repair fiche
for additional repair and diagnosis information.)

-  If differential current reading decreases to -3 to -6 mA proceed to Number 2.

2.

Disconnect barometric absolute pressure sensor with engine running

All Technical Service Bulletins for Barometric Pressure Sensor:|259201|Page 3030 > < Customer Interest for Barometric Pressure Sensor:|259201|Page 3027