Faultfinding table

Make

Alfa Romeo

Model

145/146 Electrical System Diagnosis Manual, Volume 3

Year

1994–2001

Section

Headlamp Aiming › Faultfinding table

145 electrical system diagnosisFaultfinding table

FAULTFINDING TABLE

Failure	Component to be checked
	P35a	P35b	B69
Complete adjustment			●
RH headlamp aiming device	●
LH headlamp aiming device		●
Control device lighting			●

CHECKING COMPONENTS

RH/LH hedlamp adjustment motor P35a P35b

Operating diagram: course of stroke C in relation to the voltage V/VG

V = voltage between pin 56b and pin 31 (12V)

VG = voltage between pin G and pin 31

Headlamp aiming device B69

SPECIFICATIONS
R1	390 Ω ± 3%
R2	4.7 kΩ
Knob position	Voltage between terminals G and 31 (UG)
0	94.9% UB ± 3%
1	86.6% UB ± 7%
2	79.7% UB ± 7%
3	66.4% UB ± 7%
4	51.2% UB ± 7%
(UB: voltage between pins 31 and 56b = 12V)

01 Diagnostics