ACC unit, control module connections
WARNING: This page is about a different car, the 2006 Saab 9-5. However, it is still accessible from the selected car via links, so may be relevant.
> = greater than; < = less than; ~ = alternating voltage (LP: LOGIC PROBE P = select pulse; p = visible pulses).
Connector 1 (K1) 40-pin, test readings
ACC UNIT REFERENCE
| Pin no. | Component/function | In/Out | Test conditions | Between X and Y | Test reading |
|---|---|---|---|---|---|
| 1 | Ground for control module | In | Ignition ON | 4-1 | B+ |
| 2 | Seat ventilation, left | Out | 2-11 | Stage 1: 9.5 V Stage 2: B+ |
|
| 3 | Parking heater connection | In | Activate parking heater | 3-1 | B+ |
| 4 | Power supply (+15 circuit) | In | Ignition ON or active control module | 4-1 | B+ |
| 5 | I-Bus (-) | In/Out | Ignition ON | 5-1 | 2-3 V |
| 6 | I-Bus (+) | In/Out | Ignition ON | 6-1 | 2-3 V |
| 7 | PPS "Passenger Airbag" (US/CA)(from DICE) | In | Ignition ON | 7-1 | PWM signal 3.5-B+ |
| 8 | PPS "ON" (US/CA) | Out | |||
| 9 | +15 | In | Ignition ON | B+ | |
| 10 | PPS "OFF" | Out | US/CA | ||
| 11 | Seat ventilation, return ground | In | 11-2/12 | ||
| 12 | Seat ventilation, right | Out | 12-11 | Stage 1: 9.5 V Stage 2: B+ |
|
| 13 | Fan control module's control voltage | Out | Ignition ON change fan speed | 13-1 | 0-5 V |
| 14 | Shut-off valve, heat exchanger | Out | Ignition ON | 4-14 | B+ |
| 15 | Circulation Pump | Out | Activate motor | 4-15 | B+ |
| 16 | Cabin temperature sensor | In | Ignition ON | 16-22 | See CABIN TEMPERATURE SENSOR |
| 17 | Solar sensor, test line | In | Ignition ON | 17-22 | 0-5V PULSE TRAIN, LP Hi-Lo p |
| 18 | Blended-air temperature sensor, RH | In | Ignition ON | 18-25 | see BLENDED-AIR TEMPERATURE SENSOR, RH |
| 19 | Blended-air temperature sensor, LH | In | Ignition ON | 19-24 | see BLENDED-AIR TEMPERATURE SENSOR, LH |
| 20 | B+ -voltage ON fan control module | Out | Ignition ON | 20-1 | B+ |
| 21 | Power supply +30 | In | Power supply +30 | 21-1 | B+ |
| 22 | Solar sensor ground | Out | Ignition ON | 26-22 | 12 V, 25 Hz TRIGGER, 1% LP Hi_Lo p |
| 22 | Interior temperature sensor ground | Out | Ignition ON | 16-22 | See CABIN TEMPERATURE SENSOR |
| 24 | Mixed air temperature sensor, left ground | Out | Ignition ON | 19-24 | see BLENDED-AIR TEMPERATURE SENSOR, LH |
| 25 | Mixed air temperature sensor, right ground | Out | Ignition ON | 18-25 | see BLENDED-AIR TEMPERATURE SENSOR, RH |
| 26 | Solar sensor, B+ power supply (clock pulse) | Out | Ignition ON | 26-22 | 12 V, 25 Hz TRIGGER, 1% LP Hi-Lo p |
| 27 | Power supply, air recirculation motor | Out | Activate fresh air | 27-28 | +12 V for approx. 10s |
| 28 | Power supply, air recirculation motor | Out | Activate air recirculation | 28-27 | -12 V for approx. 10s |
| 29 | Stepping motor, mixed air, left | Out | Ignition ON activate motor | 29-40 | 50 Hz/50 % LP Hi-Lo |
| 30 | Stepping motor, mixed air, left | Out | Ignition ON activate motor | 30-39 | 50 Hz/50 % LP Hi-Lo |
| 31 | Stepping motor, mixed air, right | Out | Ignition ON activate motor | 31-33 | 50 Hz/50 % LP Hi-Lo |
| 32 | Stepping motor, mixed air, right | Out | Ignition ON activate motor | 32-34 | 50 Hz/50 % LP Hi-Lo |
| 33 | Stepping motor, mixed air, right | Out | Ignition ON activate motor | 33-31 | 50 Hz/50 % LP Hi-Lo |
| 34 | Stepping motor, mixed air, right | Out | Ignition ON activate motor | 34-32 | 50 Hz/50 % LP Hi-Lo |
| 35 | Stepping motor, air distribution flap | Out | Ignition ON activate motor | 35-37 | 50 Hz/50 % LP Hi-Lo |
| 36 | Stepping motor, air distribution flap | Out | Ignition ON activate motor | 36-38 | 50 Hz/50 % LP Hi-Lo |
| 37 | Stepping motor, air distribution flap | Out | Ignition ON activate motor | 37-35 | 50 Hz/50 % LP Hi-Lo |
| 38 | Stepping motor, air distribution flap | Out | Ignition ON activate motor | 38-36 | 50 Hz/50 % LP Hi-Lo |
| 39 | Stepping motor, mixed air, left | Out | Ignition ON activate motor | 39-30 | 50 Hz/50 % LP Hi-Lo |
| 40 | Stepping motor, mixed air, left | Out | Ignition ON Activate motor | 40-29 | 50 Hz/50 % LP Hi-Lo |
Connector 2 (K2) 6-pin, test readings
ACC UNIT REFERENCE
| Pin no. | Component/function | In/Out | Test conditions | Between X and Y | Test reading |
|---|---|---|---|---|---|
| 1 | Seat heating, left | Out | Ignition ON Activate motor | 1 (K1) -1 | B+ |
| 2-3 | +30 | In | 1 (K1) -2/3 | B+ | |
| 4 | Seat heating, temperature sensor, left | In | 23 (K1)-4 | See HEATED FRONT SEAT | |
| 5 | Seat heating, temperature sensor, right | In | 23 (K1)-5 | See HEATED FRONT SEAT | |
| 6 | Seat heating, right | Out | Ignition ON Activate motor | 1 (K1) -6 | B+ |