|
No.
|
TECH
1-DISPLAY
|
Conditions
for Checking
|
Nominal
Value
|
Trouble
Codes
|
Terminal
|
|
|
31
|
CHECK
LIGHT
|
Ignition OFF
Ignition ON
|
Telltale in instrument panel on
for 3 s, then off again
|
-
|
4,
16
|
|
|
|
|
|
|
|
|
|
|
|
|
Engine running at idle speed
|
INACTIVE
12V
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Note:
As communication with the control unit is broken off when
"ignition OFF" and is not reestablished quickly enough when the
ignition is switched "ON" again, the change in the parameter value
from "OFF" to "ON" cannot be observed on the TECH 1
display.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Trouble-shooting
|
Nominal Value
|
Cause of
Fault:
(If nominal
value is not attained)
|
|
|
· Ignition OFF
· Ignition ON
|
All telltales (oil level,
battery, ABS, engine, airbag) briefly ON
|
· Fuse F15 defective
· Circuit interruption or
short circuit to ground
from: wiring harness plug for switch S1 Ter. 15
to: wiring harness plug for instrument Ter. 21
· Strip conductor (on rear
of instrument) defective
· Fuse F15 defective
|
|
|
|
|
|
|
|
· Ignition OFF
· Disconnect wiring harness
plug from DDE control unit K70
· Ignition ON
|
Engine telltale H30 OFF
|
· Short circuit to ground
from: wiring harness plug for instrument strip conductor
Ter. 1
to: wiring harness plug for DDE control unit K70
Ter. 4
· Strip conductor (on rear
of instrument) defective
|
|
|
|
|
|
|
|
· Bridge wiring harness
plug for DDE control unit K70 with electrically fused jumper
from: wiring harness plug for DDE control unit K70 Ter. 4
to: ground
|
Engine telltale H30 ON
|
· Short circuit to voltage
from: wiring harness plug for DDE control unit K70 Ter. 4
to: wiring harness plug for instrument Ter. 1
Note:
In this test, the fuse for the
electrically fused jumper is blown.
|
|
|
|
|
|
|
|
|
|
· Circuit interruption
from: wiring harness plug for DDE control unit K70 Ter. 4
to: wiring harness plug for strip conductor Ter. 1
· Strip conductor (on rear
of instrument) defective
· Engine telltale H30 defective or
corroded contacts
|
|
|
|
|
|
|
|
· Ignition OFF
· Using multimeter, measure
resistance
from: wiring harness plug for DDE control unit K70 Ter. 18
or Ter. 19
to: ground
|
lower than 2 W
|
· Circuit interruption
from: wiring harness plug for DDE control unit K70 Ter. 18
or Ter. 19
to: ground
|
|
|
|
|
|
|
|
|
If nominal values are attained
|
· DDE control unit K70
defective
|
|
|
|
|
|
|
|
Actuator test see section 5.8
"Table 5 Digital Diesel Electronics DDE 2.1 F5:ACTUATOR TEST" test
step no. 07 CHECK LIGHT
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