|
STEP |
CHECK TO BE CARRIED OUT |
SOLUTION IF CHECK IS NOT OK |
|
1 |
Sensor power supply check Connect to pins 1 and 3 of the pressure sensor connector using the Examiner in the voltmeter function. Turn the ignition key to the ON position Check for a voltage of approximately 5 Volts |
Restore the continuity of the wiring between the engine management control unit and the pressure sensor If the supply is interrupted at the engine control unit outlet, replace the engine management control unit |
|
2 |
Pressure signal check Connect the Examiner in voltmeter mode: black probe at pin 1 of the sensor and red probe at pin 4 Start the engine Check for a voltage signal of approximately 1 Volt and that the value increases when the engine is accelerated as shown in the attached graph. |
Replace the intake air pressure/temperature sensor |
|
3 |
Temperature signal check Disconnect the connector from the sensor Connect an Examiner in Ohmmeter mode to pins 1 and 2 of the sensor Check for a resistance as shown in the attachment. |
Replace the intake air pressure/temperature sensor |
Sensor pin out
1. Earth
2. NTC
3. +5V
4. Ua (signal output)
Output signal specifications
Us = 5 V power supply
S = Output signal
P = Absolute pressure Pabs
Air temperature sensor specifications
|
Temperature °C |
Resistances in |
||
|
min. |
rated |
max. |
|
|
- 40 ± 1 |
42661 |
48153 |
45224 |
|
-35 ± 1 |
31810 |
35732 |
40118 |
|
-30 ± 1 |
23976 |
26855 |
30015 |
|
-25 ± 1 |
18258 |
20376 |
22695 |
|
-20 ± 1 |
14039 |
15614 |
17333 |
|
-15 ± 1 |
10895 |
12078 |
13365 |
|
-10 ± 1 |
8529.5 |
9426.0 |
10399 |
|
-5 ± 1 |
6733.5 |
7419.0 |
8161.4 |
|
0 ± 1 |
5358.1 |
5886.7 |
6457.8 |
|
5 ± 1 |
4295.9 |
4706.9 |
5149.8 |
|
10 ± 1 |
3469.2 |
3791.1 |
4137.3 |
|
15 ± 1 |
2820.9 |
3074.9 |
3347.5 |
|
20 ± 1 |
2308.8 |
2510.6 |
2726.8 |
|
25 ± 1 |
1904.0 |
2062.9 |
2235.6 |
|
30 ± 1 |
1586.1 |
1715.4 |
1853.1 |
|
35 ± 1 |
1326.3 |
1431.8 |
1544.1 |
|
40 ± 1 |
1113.0 |
1199.6 |
1291.5 |
|
45 ± 1 |
937.41 |
1008.6 |
1084.2 |
|
50 ± 1 |
792.27 |
851.10 |
913.45 |
|
55 ± 1 |
671.90 |
720.65 |
772.28 |
|
60 ± 1 |
571.72 |
612.27 |
655.16 |
|
65 ± 1 |
488.07 |
521.91 |
557.67 |
|
70 ± 1 |
417.98 |
446.33 |
476.24 |
|
75 ± 1 |
359.08 |
382.89 |
407.99 |
|
80 ± 1 |
309.41 |
329.48 |
350.61 |
|
85 ± 1 |
267.40 |
284.06 |
302.22 |
|
90 ± 1 |
231.76 |
246.15 |
261.27 |
|
95 ± 1 |
201.44 |
213.68 |
226.53 |
|
100 ± 1 |
175.52 |
186.00 |
196.95 |
|
105 ± 1 |
153.18 |
162.35 |
171.88 |
|
110 ± 1 |
134.04 |
142.08 |
150.43 |
|
115 ± 1 |
117.59 |
124.66 |
132.00 |
|
103.42 |
109.65 |
116.12 |
|
|
91.18 |
96.68 |
102.39 |
|
|
80.58 |
85.45 |
90.51 |
|