|
No.
|
TECH 1-Display
|
Conditions
for Checking
|
Nominal
Value
|
Trouble
Codes
|
Terminal
|
|
10
|
SELECT
ACTUATOR EGR PULS. RATIO
|
Check information:
Carry out check 1 if the
engine does not start; otherwise proceed to check 2 (check of exhaust gas
recirculation system).
|
|
33,
34, 132
|
23,
50, 19
|
|
|
|
Check 1 (check of exhaust gas
recirculation valve):
Ignition ON
Engine OFF
|
The exhaust gas recirculation
valve switches alternately:
INACTIVE
ACTIVE
|
|
|
|
|
|
Press key F5 in the system
main menu, select the desired test using the arrow keys and confirm with YES.
Follow the instructions in the
TECH 1 display
Note:
The exhaust gas recirculation
valve is actuated at a frequency of 0.5 Hz (actuation duration
1 s).
The check is completed after a
maximum of 30 s.
|
Noise check:
clicking noise from exhaust gas
recirculation valve
|
|
|
|
|
|
Check 2 (check of exhaust gas
recirculation system):
|
The TECH 1 display shows
alternately
EGR PULSE RATIO
|
|
|
|
|
|
Engine running at idle speed,
operating temperature
|
0 %
50 %
EGR POS. FDBK
|
|
|
|
|
|
Throttle valve CLOSED
(acccelerator pedal in idle position)
|
0.7 V
1.41 V
|
|
|
|
|
|
Vehicle stationary
Press key F5 in the system
main menu, select the desired test using the arrow keys and confirm with YES.
Follow the instructions in the
TECH 1 display.
Note:
The exhaust gas recirculation
valve is actuated at a frequency of 0.5 Hz (actuation duration 1 s).
The check is completed after
5 cycles have been switched.
|
During the test, the engine speed may oscillate.
|
|
|
|
Notes on Trouble - shooting:
|
Nominal Value:
|
Cause of Fault:
|
|
· Ignition
ON
· Using
multimeter, measure voltage at plug of exhaust gas recirculation valve
Y 18 / Ter. E to ground
|
11.5 to 13.5 V
|
· Lead
interruptions from control unit K 61 / Ter. 37 or from
injectors relay K 43 / Ter. 8 to exhaust gas recirculation
valve Y 18 / Ter. E
|
|
· Ignition
OFF
· Disconnect
control unit K 61 from wiring harness
· Using
multimeter, check from plug of exhaust gas recirculation valve
Y 18 / Ter. A to control unit K 61 / Ter. 23
for passage and short circuit to ground
|
0 W
|
· Short
circuit or lead interruption from exhaust gas recirculation valve
Y 18 / Ter. A to control unit K 61 / Ter. 23
|
|
Nominal values are attained
|
|
· Mechanical
part of exhaust gas recirculation valve defective
· Electrical
part of exhaust gas recirculation valve defective
· Control
unit K 61 defective
|
|
|
|
|
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