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Remember Saab 9-3 II

Driver Information Main Instrument Unit and Sid 10 illustrations ~503 words

Remember

  1. Note the test conditions and use common sense when assessing the test result.
  2. First check that the control module has a power supply and is grounded.
  3. Then check all sensor inputs and signals from other systems.
  4. Finally, check the control module outputs. Remember that these readings are not an indication that the actuator is in working order.
  5. If a reading is not OK, consult the wiring diagram to trace the leads, connectors or components which should be checked more thoroughly.
  6. The specified test readings are based on the use of a calibrated Fluke 88/97.
  7. Readings %(+) and ms(+) indicate the signal pulse ratio and pulse width respectively. A test instrument with pulse ratio and pulse width measurement must be used. The sign (+) indicates a positive trigger pulse, TRIG+.

Scheme 151

Scheme 151: Control module connection
Scheme 151: Control module connection
PinComponent / FunctionIn/OutTest conditionsAcrossTest readingComments
1Check Engine lampInIgnition ON1-411.5-12 V
2No connection
3Battery voltage +30InIgnition ON3-4B+
4GroundInIgnition ON4-B+B+
5No connection
6No connection
7I-busIn/OutIgnition ON Connect 86 11 857 TEST LAMP, RED/GREEN7-4The test lamp should flashAll units connected to the I-bus transmit signals.
8I-busIn/OutIgnition ON Connect 86 11 857 TEST LAMP, RED/GREEN8-4The test lamp should flashAll units connected to the I-bus transmit signals.
9-12No connection

COMPONENT FUNCTION

Scheme 152

Scheme 152
Scheme 152
LocationFront spoiler
Number of pins2
°C (°F)KohmVolt
40 (-40)169.44.72
30 (-22)88.744.49
20 (-4)48.584.15
10 (14)27.673.67
0 (32)16.333.10
10 (50)9.9512.49
20 (68)5.2461.72
30 (86)4.0281.43
40 (104)2.6631.05
50 (122)1.8010.76

LOCATION REFERENCE

Power supply 5 V through a 6.8 kohm resistor in the control module.

Scheme 153

Scheme 153: 86 11 857 Test lamp, red-green
Scheme 153: 86 11 857 Test lamp, red-green

Voltage range 8-16V

Group: Test equipment

9000900-M93900/9-39-59-3 (9440)
XXXXX

SPECIAL TOOL COMPATIBILITY CHART

Scheme 154

Scheme 154: General
Scheme 154: General

A suitable instrument to use is a multimeter.

The ohmmeter must not be used to test components containing semi-conductors, e.g. control modules and relay with timing functions, etc.

When measuring resistance, the power supply to the system being tested must be disconnected as the measuring instrument generates a weak current in the circuit in question.

This is done to ensure that there is no current already in the tested circuit and that the correct reading is obtained.

Scheme 155

Scheme 155: Testing for open circuits by measuring voltage
Scheme 155: Testing for open circuits by measuring voltage

Scheme 156

Scheme 156
Scheme 156
  1. Turn on the load.
  2. Set the multimeter for measuring voltage and connect the negative lead of the voltmeter to a good grounding point.
  3. Connect the positive lead of the voltmeter to the point where the voltage is to be read.
  4. On the output side of switches/control modules, it is better to start checking from these and gradually work your way towards the load. When there is no longer a voltage reading, you will have gone past the break point.
  5. On the input side of switches/control modules/consumers, it is better to start at the power source (normally a fuse) and then move gradually towards the switch/control module/consumer. When there is no longer a voltage reading, you will have gone past the break point.

Scheme 157

Scheme 157: Testing for open circuits by measuring resistance
Scheme 157: Testing for open circuits by measuring resistance

Scheme 158

Scheme 158
Scheme 158
  1. Make sure the component or lead to be tested is not under tension (e.g. by removing the relevant fuse).
  2. Set the multimeter for measuring ohms and connect the ohmmeter to each end of the component/lead to be tested.
  3. Jiggle the relevant wiring harness while observing the ohmmeter. Normally, the resistance of a wiring harness is less than 1 ohm. Specified values apply to components.

Scheme 159

Scheme 159: Testing for short circuits to ground
Scheme 159: Testing for short circuits to ground

Scheme 160

Scheme 160
Scheme 160
  1. Make sure the lead being tested is not under tension (e.g. remove the relevant fuse) and that any loads are disconnected.
  2. Set the multimeter for measuring ohms.
  3. Connect one test lead to a good ground and the other to the point to be tested.
  4. Carefully jiggle the wiring harness and make sure the multimeter reading shows infinite resistance (OL) all the time.