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Measurement values, control unit connections PSG 16

Measurement values, control unit connections PSG 16


Scope

Directions for the measurement of levels and signals at the control module PSG 16 and the measurement values are given on the following pages.

Remember:


Pay attention to the measurement requirements, use common sense when judging the measurement result.

The measurement values which are given are with the ignition ON unless otherwise stated.

Check first that there is a voltage supply to the control module and that it is grounded.

Then check all sensor inputs and signals from other systems.

Lastly check the outputs of the control module. Remember that the output values do not say anything about the functioning of the related actuator.







If any measurement value is incorrect, use the wiring diagram to determine which cables, connectors or components should also be checked.

The given measurement values are as measured with a calibrated Fluke 88/97.

The measurement values %(+) and ms(+) show respectively the pulse ratio and the pulse length. A test instrument with pulse ratio and pulse width measurement must be used. The plus sign (+) denotes a positive trigger pulse, TRIG+.



>= greater than; <= less than

Pins without further comments lack a pin connection. (LP: LOGIC PROBE P= choose pulse; p= visible pulses)

Note

*All units connected to the I and P busses transmit signals.


Connector K

Pin ( refers to the control module) Colour Component / Function In / Out Measurement requirement. Measurement value Measure between
4 VT/WH Control module, glow plug Out Glow plug not activated 10.3 V 5-50
5 Radiator fan circuit 3 Out Radiator fan circuit 3 activated Radiator fan circuit 3 not activated <0.1 V B+ 5-50 5-50
7 YE/BU Power supply measurement Group 3 Out 5 V 7-50
8 BK Sensor ground In <0.1 V 8-50
9 YE Reference ground, pedal position sensor 1 In <0.1 V 9-50
10 YE/BU Relay, +50 In Rotation of the starter motor B+ <0.1 V 10-28
14 VT/WH Check Engine warning light Out B+ 14-50
16 RD/GN Power supply, +15 Out <0.1 V 16-B+
17 P bus- * 2-3V 17-50
19 YE/GN Clutch switch, cruise control In Unaffected Depressed B+ <0.1 V 19-50
21 VT/WH Reference ground, pedal position sensor 2 In <0.1 V 21-50
23 GN/GY Relay, +50 Out Rotation of the starter motor B+ <0.1 V 10-28
28 YE/BU Main relay Out <1 V 28-50
29 P bus+ * 2-3V 29-50
30 GN/GY A/C compressor Out Idling, A/C on B+ <0.5 V 30-50
31 GN/BU Power supply measurement, Group 2 Out 5 V 31-50
32 GY Pressure sensor, A/C In 1-1.5 V 32-50
33 BU/WH Pedal position sensor 1 In Unaffected Depressed <1 V 3.7-3.8 V 33-9
35 GY Glow plug control module, signal In <0.5 V 35-50
36 BK/YE Brake switch, cruise control In Unaffected Depressed B+ <0.1 V 36-50
40 BU/WH Brake lights In Unaffected Depressed <1.5 V B+ 40-50
44 OG/WH Atmospheric pressure sensor In 4.2 V 44-50
45 BU/WH Pedal position sensor 2 In Unaffected Depressed 0.5 V 1.8 V 45-21
49 YE/GY Main relay In B+ 49-50
50 BK Power ground Out B+ 50-49
51 YE/GY Main relay B+ 51-50
52 BK Power ground B+ 52-49
53 YE/GY Main relay B+ 53-50
54 BK Power ground B+ 54-49
55 YE/GY Main relay B+ 55-49
56 BK Power ground B+ 56-49



Connector M

Pin ( refers to the control module) Colour Component / Function In / Out Measurement requirement. Measurement value Measure between
1 GN/WH Mass air flow sensor Out 5 V 1-47
6 GN/WH Level switch, engine oil Out <0.1 V 6-B-
8 GY Temperature sensor, coolant Out 2.9 V 8-45
9 BU Absolute pressure sensor In 1.75 V 9-B-
10 BK/GN Mass air flow sensor In 1.1 V 10-B-
11 GY Screen ground In <0.1 V 11-B-
13 PK Solenoid valve, charge air Out 5.5 V 13-B-
14 WH EGR Out 10.3 V 14-B-
19 OG/WH EGR In 4.4 V 19-B-
21 BK Temperature sensor, engine oil Out 4.1 V 21-33
22 GN/WH Intake air temperature In 2.2 V 22-46
23 BK Crankshaft sensor In Idling 1.6 V alternating current 23-35
24 GN/WH Pressure switch, engine oil Out Idling <0.1 V B+ 24-B-
27 L-Terminal Idling B+ <0.5 V 27-B+
28 YE/BU Main relay Out B+ 28-B+
29 PK Solenoid valve, engine shut-off Out B+ 29-B-
33 BK Temperature sensor, engine oil In 4.1 V 33-21
34 BK Level sensor, fuel In B+ 34-B+
35 YE Crankshaft sensor In Idling 1.6 V alternating current 35-23
39 BU/WH Power supply, Map Out 5 V 39-B-
42 PK Solenoid valve, engine shut-off Out B+ 42-B-
43 BN/WH Solenoid valve, combustion circulation Out 5.3 V 43-B-
45 BK Temperature sensor, coolant In 2.9 V 45-8
46 BK Map, sensor ground In 5 V 46-39
47 BU Mass air flow sensor, reference ground In 5 V 47-1
48 GY Level sensor, fuel Out 1 V 48-34