Saab 9000 - Page 214

Fault d_iagnosis 211
Diagnostic~trouble
codes
P1576, P1577
2
0000
0000
0000
0000
00(::=)
0000
0000
-ODDO
0000
OOC:J
14---5
Min----~
Diagnostic procedure
1 Check the brake lights
- Check whether the brake lights come on when
the brake pedal is depressed.
Do the brake lights work?
I
YES
I
Check the lead between pin 15 of the control
module and crimped connection J32. Repair
or replace the lead
if
necessary.
Continue with point 2.
Continue fault diagnosis as described in
Service Manual 3:2 "Electrical system, bra-
ke lights".
Then carry out a final check in accordance
with point 2.
2 Final check:
- Clear the diagnostic trouble code.
- Implementation of driving cycle:
Drive the car at varying engine loads and rpm
for 5 minutes.
- Evaluation of driving cycle:
- Connect an
ISAT
scan tool.
- Select "READ ON/OFF".
- Select "BRAKE
LIGHT
SWITCH".
The ISAT scan tool display should read "ON" when
the brake pedal is depressed.
Does the display read "OFF"?
I
YES
I
Proceed to page 282.
I
NO
I
The remedial measure taken was correct.
Saab9000
·I