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No.
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TECH
1-DISPLAY
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Conditions
for Checking
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Nominal
Value
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Trouble
Codes
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Terminal
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33
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EGR SOLENOID
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Engine running at idle speed, operating temperature
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-
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6, 16
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Switch off all consumers
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5 %
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Actuate accelerator pedal
slightly (engine speed higher than 2000 rpm)
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94 %
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Trouble-shooting
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Nominal Value
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Cause of
Fault:
(If nominal
value is not attained)
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· Ignition OFF
· Disconnect wiring harness plug from DDE control
unit K70
· Pulse exhaust gas recirculation solenoid valve
Y18
from: wiring harness plug for DDE
control unit K70 Ter. 6
to: ground
|
No clicking noise from exhaust gas recirculation
solenoid valve Y18
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· Short circuit to voltage
from: wiring harness plug for
exhaust gas recirculation solenoid valve Y18 Ter. 2
to: base of reverse battery
protection relay K17 Ter. 2
· Exhaust gas recirculation solenoid valve Y18
defective
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· Ignition ON
· Pulse exhaust gas recirculation solenoid valve
Y18
from: wiring harness plug for DDE
control unit K70 Ter. 6
to: ground
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Quiet clicking noise when exhaust gas recirculation
solenoid valve Y18 switches
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· Short circuit to ground
from: wiring harness plug for DDE
control unit K70 Ter. 6
to: wiring harness plug for
exhaust gas recirculation solenoid valve Y18 Ter. 1
· Circuit interruption
from: wiring harness plug for DDE
control unit K70 Ter. 6
to: wiring harness plug for
exhaust gas recirculation solenoid valve Y18 Ter. 1
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· Circuit interruption
from: wiring harness plug for
exhaust gas recirculation solenoid valve Y18 Ter. 2
to: base of reverse battery
protection relay K17 Ter. 2
· Exhaust gas recirculation solenoid valve
Y 18 defective
|
|
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· Pulse exhaust gas recirculation solenoid valve
Y18
from: wiring harness plug for DDE
control unit K70 Ter. 6
to: ground
|
No clicking noise from injection adjuster solenoid
valve Y20 and from injection pump actuator P68
|
· Short circuit to ground
from: wiring harness plug for DDE
control unit K70 Ter. 6
to: wiring harness plug for
DDE control unit K70 Ter. 1 or 2
(injection pump actuator
P68) or Ter. 10 (injection adjuster solenoid valve Y20)
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|
· Ignition OFF
· Using multimeter, measure resistance
from: wiring harness plug for DDE
control unit K70 Ter. 6
to: wiring harness plug for
DDE control unit K70 Ter. 13
|
greater than 100 kW (¥)
|
· Short circuit to ground
from: wiring harness plug for DDE
control unit K70 Ter. 6
to: wiring harness plug for
DDE control unit K70 Ter. 13
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· Using multimeter, measure resistance
from: wiring harness plug for DDE
control unit K70 Ter. 18 or Ter. 19
to: ground
|
lower than 2 W
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· Circuit interruption
from: wiring harness plug for DDE
control unit K70 Ter. 18 or Ter. 19
to: ground
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If nominal values are attained
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· DDE control unit K70 defective
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Note:
The tests described above are static checks and not
real function checks. For this reason, it is possible that the measurements
are okay, but that the exhaust gas recirculation solenoid valve still does
not function properly. The cause of this may be mechanical faults. Therefore,
before replacing the control unit or the exhaust gas recirculation solenoid
valve, first perform a mechanical function check (see Service Instructions).
If the exhaust gas recirculation solenoid valve still does not function
correctly, the control unit or the solenoid valve must then be replaced.
Actuator test see section 5.8 "Table 5 Digital
Diesel Electronics DDE 2.1 F5:ACTUATOR TEST" test step no. 03 EGR SOLENOID
Adjustment see section 5.9 "Table 6, Digital
Diesel Electronics DDE 2.1 F6:ADJUSTMENT" test step no. 05 EGR RATE
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