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How to retrieve fault codes:
If you wish to view the fault codes your ACC unit has stored, simply hold down the AUTO and OFF buttons on the ACC control panel.
The display will then display a single digit number on the left, and a double digit on the right.
i.e 1 ____ 21
This would signify 1 fault code stored, code 21

Fault Code
Defective function/component
Malfunction
Tech2 Code

1
Control module
Internal control module malfunction
B1605

2
Cabin temperature sensor
Open circuit or short to B+
B1350

2
Cabin temperature sensor
Short-circuit to ground
B1350

3
Solar sensor
Open circuit or communication error
B1340

4
Mixed-air temperature sensor, LH
Open circuit or short to B+
B1345

4
Mixed-air temperature sensor, LH
Short-circuit to ground
B1345

5
Mixed-air temperature sensor, RH
Short-circuit to ground
B2345

5
Mixed-air temperature sensor, RH
Open circuit or short to B+
B2345

6
Stepping motor, air-mixing flap, LH
Open circuit, short to B+ or short to ground
B2490

7
Stepping motor, air-mixing flap, LH
Jammed flap
B2496

8
Stepping motor, air-mixing flap, RH
Loose flap
B2295

8
Stepping motor, air-mixing flap, LH
Loose flap
B2495

9
Stepping motor, air-mixing flap, RH
Open circuit
B2290

9
Stepping motor, air-mixing flap, RH
Short-circuit to ground
B2290

10
Stepping motor, air-mixing flap, RH
Jammed flap
B2296

12
Stepping motor, air distribution flap
Open circuit
B2400

12
Stepping motor, air distribution flap
Short-circuit to ground
B2400

13
Stepping motor, air distribution flap
Jammed flap
B2406

14
Stepping motor, air distribution flap
Loose flap
B2405

18
Heat exchanger solenoid
Open circuit, short-circuit to ground
B2375

18
Heat exchanger solenoid
Short-circuit to B+
B2375

19
Circulation pump
Open circuit, short-circuit to ground
B2380

19
Circulation pump
Short-circuit to B+
B2380

20
Control voltage, fan
Short-circuit to B+
B2425

20
Control voltage, fan
Short-circuit to ground
B2425

21 Direct current motor, air recirculation flap B+ open circuit or shorted to ground B2410
22 This fault code means the ACC software is corrupt, this will require reflashing by a dealer using tech2
Most ACC systems will work normally with this code.

23
Sensor ground
Ground to sensors shorting to B+
B2945

Information provided by: www.saab9-5.com
 
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