Checking The Engine-Speed And Temperature Measuring Module (Dtm); Checking Oil Temperature And Engine Speed In Diesel Diagnosis - Bosch BEA 150 Repair Instructions

6.

Checking the engine-speed and temperature measuring module (DTM)

i Before you replace the PCB of the DTM you must first check the function of the internal interface from the DTM PCB to the control
module PCB (Section 5.1) and then the function of the individual sensors (see following sections).
6.1 Checking oil temperature and
engine speed in Diesel
Diagnosis
1. Switch on the BEA and wait until the
self-test is completed.
2. Select the Diagnosis menu by pres-
sing F2 or u, and open by pressing F5
>> or E.
3. Next, select the Diesel menu by pres-
sing F2 or u, and open by pressing
F5 >> or E.
4. Press F5 >> or E to open the Conti-
nuous measurement menu.
5. Connect the clamp-on pickup lead of
the P 140 to the clamp-on pickup
input of the BEA.
6. Connect the temperature lead of the
P 140 to the temperature-measure-
ment input of the BEA.
7. Switch on the P 140.
8. In the No. of pulses menu, set the
number of pulses to 1 using the o or
u keys.
9. First of all, automatic zero calibration
takes place.
10. Set the temperature selector switch
of the P 140 first to 80°C, then to
120°C.
Nominal values: 80°C + 3°C
120°C + 3°C
11. Set the speed selector switch of the
P 140 to the engine speeds from 600
- 6000 rpm one after the other:
Nominal Values:
600 rpm + 10 rpm
1500 rpm + 10 rpm
4000 rpm + 10 rpm
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