Safety Precautions; Reading Measured Value Block - Volkswagen CJDA Workshop Manual

3
Industriemotoren - Industrial Engines 2009 ▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
◆ At idling speed ⇒ " Evaluating measured value blocks at
idling speed" on page
◆ At full load ⇒ " Evaluating measured value blocks at full load
(engine code CPYA)" on page
6.1

Safety precautions

WARNING
When doing any repair work, pay attention to the follow-
ing due to the cramped conditions:
◆ Route all the various lines (e.g. for fuel, hydraulics,
activated charcoal filter system, coolant, refrigerant,
brake fluid and vacuum) and electrical wiring in their
original positions.
◆ Ensure that there is sufficient clearance to all moving
or hot components.
To prevent injuries to persons and/or destruction of the injection
and glow plug system, the following must be noted:
◆ Always switch off the ignition before connecting or discon-
necting injection and glow plug system wiring or tester ca-
bles.
◆ If the engine is to be turned at starter speed without starting,
e.g. to check compression, pull connector -A- off injectors.
◆ Disconnecting and connecting the battery must only be done
with the ignition switched off, otherwise the engine control
unit could be damaged.
Note the following if testers and measuring instruments have to
be used during a road test:
◆ The test and measuring equipment must always be secured
and operated by a 2nd person.
6.2

Reading measured value block

Note
The measured values in the diagnosis function "011-Read
measured value block" are described in the sections for check-
ing the individual components. This table serves only as an
overview.
Test prerequisites
● Fuses must be OK.
● The battery voltage must be at least 11.5 V.
● Earth connections OK
● All electrical consumers must be switched off.
● Some measured values change as the engine temperature
changes. Note the coolant temperature. The specifications
110 Repair Group 01 - Vehicle self-diagnosis
111,
125.