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This test step serves as a
learning and checking value for better comprehension of the system and to
evaluate the system with external influences.
The injection period is composed
of several elements which have an effect on the size of the signal.
If the measurements of the
following test steps deviate from the nominal values, carry out
trouble - shooting.
Test Step Check of
No.
01 BATTERY VOLTAGE
02 TPS SIGNAL
05 INTAKE AIR TEMP.
06 COOLANT TEMP.
07 MASS AIR FLOW S.
21 ENGINE LOAD SIG.
23 FUEL PUMP RELAY
38 ENGINE SPEED
47 / 48 02 SENSOR 1
or 2
51 / 52 02 INTEGRATOR 1
or 2
53 / 54 02 BLM IDLE 1
or 2
Further additional causes of fault are:
· Lead
interruptions
- injector
relay K 43 / Ter. 8 (+) to injectors
- control
unit K 61 / Ter. 15, Ter. 16, Ter. 17, Ter. 33,
Ter. 34, Ter. 35
to injectors
· Pressure
regulator defective
· Injectors
stick
· Electromagnetic
interference caused by
- ignition
leads (reroute further away from wiring harness)
- alternator
(worn carbon brushes produce sparks)
· Control
unit K 61 defective
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