996 Turbo diagnostic manual — Turbo applicability only / PAGE 961
Headlight beam adjustment HBA 01 911 Turbo (996)94 · Work instruction
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Headlight beam adjustment HBA 01 911 Turbo (996)94
Work instruction Display OK If not OK
5 Check 5 V supply lead ♦Switch off ignition ∞ Ω Repair wiring har-
for short to ground Continue with 6 ness ♦Pull plug off the control module
End for HBA
♦Measure resistance between
the plug on the control module
for HBA pin 14 and ground
6 Check 5 V supply lead ♦Switch ignition on 0 V Repair wiring har-
for short to B+ Continue with 7 ness ♦Measure voltage between the
End plug on the control module for
HBA pin 14 and ground
7 Check 5 V supply lead ♦Switch off ignition < 5 Ω Repair wiring har-
for open circuit Continue with 13 ness ♦Measure resistance between
End the plug on the control module
for HBA pin 14 and the plug on
the angle sensor for HBA,
front, pin 5
8 Check ground lead of the ♦Measure resistance between < 5 Ω Repair wiring har-
sensor for open circuit the plug on the control module Continue with 13 ness
for HBA pin 17 and the plug on End
the angle sensor for HBA pin 1
9 Check signal wire of the ♦Pull plug off the control module ∞ Ω Repair wiring har-
sensor for short to for HBA Continue with 10 ness
ground End ♦Measure resistance between
the plug on the control module
for HBA pin 12 and ground
♦Measure resistance between
the plug on the control module
for HBA pin 12 and pin 17
10 Check signal wire of the ♦Switch ignition on 0 V Repair wiring har-
sensor for short to B+ Continue with 11 ness ♦Measure voltage between the
End plug on the control module for
HBA pin 12 and ground
11 Check signal wire of the ♦Switch off ignition < 5 Ω Repair wiring har-
sensor for open circuit Continue with 13 ness ♦Measure resistance between
End the plug on the control module
for HBA pin 12 and the plug on
the angle sensor for HBA,
front, pin 5
12 ♦Replace angle sensor for HBA, front
13 ♦Replace control module for HBA
94-9 page 2 9492 Fault code 3
3xxxlw01 Printed in Germany, 2001
This is a source reference. Confirm exact model applicability in the original material.
