Test readings, control module connections
| Test readings, control module connections |
| Remember: |
| • |
Observe the test conditions. Use common sense when evaluating test results.
|
|
| • |
First check that the control module is supplied with current and grounded.
Then check all sensor inputs and signals from other systems. Check the control module outputs last. Remember that the test readings do not indicate whether or not the actuator is working. |
|
| • |
If any reading is not OK, consult the wiring diagram to trace the leads, connectors or components which ought to be checked more thoroughly.
|
|
| • |
The specified test readings refer to a calibrated Fluke 88/97.
|
|
| • |
The test readings show respectively the pulse ratio and pulse duration of the signal. A test instrument capable of measuring both pulse ratio and pulse duration must be used.
|
|
| ACC unit, control module connections |
> = greater than; < = less than; ∼ = alternating voltage (LP: LOGIC PROBE P = select pulse; p = visible pulses).
Connector 1 (K1) 40-pin, test readings
| 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 Technical data
|
|
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 Technical data
|
|
19
|
Blended-air temperature sensor, LH
|
In
|
Ignition ON
|
19-24
|
see Technical data
|
|
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 Technical data
|
|
24
|
Mixed air temperature sensor, left ground
|
Out
|
Ignition ON
|
19-24
|
See Technical data
|
|
25
|
Mixed air temperature sensor, right ground
|
Out
|
Ignition ON
|
18-25
|
See Technical data
|
|
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
|
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 Technical data, heating pad, seat
|
|
5
|
Seat heating, temperature sensor, right
|
In
|
|
23 (K1)-5
|
See Technical data, heating pad, seat
|
|
6
|
Seat heating, right
|
Out
|
Ignition ON
Activate motor |
1 (K1) -6
|
B+
|
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