Test readings, control module connections: Remember

Note the test conditions and use common sense when assessing the test result.
The presented readings are with the ignition ON unless otherwise stated.
First check that the control module has a power supply and is grounded.
Then check all sensor inputs and signals from other systems.
Finally, check the control module outputs. Remember that the test readings do not indicate whether or not the actuator is in working order.
If any reading is not OK, consult the wiring diagram to trace the leads, connectors or components which should be checked more thoroughly.
The specified test readings refer to those obtained with a calibrated Fluke 88/97.
The test values %(+) and ms(+) indicate the pulse ratio and pulse duration of the signal. A test instrument for measuring pulse ratio and pulse duration must be used. The (+) sign indicates a positive trigger pulse, TRIG+.

Fig 1: Checking Control Module Outputs
Courtesy of SAAB-SCANIA OF AMERICA, INC.

Fig 2: Identifying Control Module Connector Pinouts
Courtesy of SAAB-SCANIA OF AMERICA, INC.

CONTROL MODULE CONNECTOR REFERENCE DATA

Pin No.	Cable color	Component/function	In/Out	Test conditions	Across	Test reading
1	BK	Ground	Out	Ignition ON	1-B-	< 0.5 V
2		No connection
3	YE/WH	Steering wheel controls, ground	-	Ignition ON	3-B-	< 0.1 V
4	BK/WH	Rheostat, ground	-	Ignition ON	4-B-	< 0.1 V
5	GN/BU	Outdoor temperature sensor ground	-	Ignition ON	5-B-	< 0.1 V
6		No connection		TEMPERATURE SENSOR, OUTDOOR
7		No connection
8	YE/GY	Battery Voltage +15	In	Ignition ON	8-B+	< 0.5 V
9	WH	Bus (-)	In/Out	Ignition ON	9-1	2.5 V
10	BN	FILAMENT MONITOR, FRONT LIGHTS .	In	Ignition ON	10-1	B+
11	RD/YE	Rheostat +	In	Ignition ON "Max." rheostat position.	11-1	0 V
				"Min." rheostat position	11-1	3.5 V
12		No connection
13		No connection
14		No connection
15	RD/WH	Battery Voltage +30	In	Ignition ON	5-B+	< 0.5 V
16	GN	Bus +	In/Out	Ignition ON	16-1	2.5 V
17	YE/WH	Horn, relay	Out	Ignition ON Horn NOT activated.	17-1	B+
18	BK/YE	Steering wheel controls + (switches)	In	Ignition ON Press the following buttons:		-
				Horn	18-1	0 V
				VOL -	18-1	0.7 V
				VOL +	18-1	1.2 V
				SRC	18-1	1.8 V
				SEEK	18-1	2.4 V
				<< SEEK	18-1	3.0 V
				NXT	18-1	3.6 V
				Normal position	18-1	4.2 V
				ON	18-1	0 V
19	YE/GN	TEMPERATURE SENSOR, OUTDOOR .	In	Ignition ON Temperature readings:
				10°C/50°F	19-1	2.49 V
				20°C/68°F	19-1	1.72 V
				30°C/86°F	19-1	1.43 V
20	RD/BU	Parking heater/auxiliary heater	Out	Activated	20-1	0 V
				Not activated	20-1	B+
21	GY/WH	Washer fluid, level sensor	In	Washer fluid present (closed contact).	21-1	0 V
				No washer fluid present (open contact).	21-1	B+
22	BK/GN	Coolant, level sensor	In	Coolant present (closed contact).	22-1	0 V
				No coolant present (open contact).	22-1	B+