|
No.
|
TECH 1 Display
|
Conditions for
Checking
|
Nominal Value
|
Trouble Codes
|
Terminal
|
|
17
|
EGR POS. FDBK
|
Engine running at idle speed, operating temperature
Engine running in partial load range, operating temperature
|
less than 1 %
greater than 1 %
|
47
|
D 11
|
|
Trouble - shooting:
|
Nominal Value:
|
Cause of Fault:
(If nominal value is not attained)
|
|
· Test
step no. 16 OK?
· Ignition
OFF
· Remove plugs
from exhaust gas recirculation valve Y 18, throttle valve potentiometer
P 34, intake manifold pressure sensor P 23 and coolant temperature
sensor P 30.
· Ignition
ON
· Measure
voltage:
from: wiring
harness plug, exhaust gas recirculation valve Y 18 Ter. C
to: ground
|
less than 0.1 V
|
· Carry
out test step No. 16, part 2.
|
|
|
|
· Short
circuit in wiring harness
from: wiring
harness plug, exhaust gas recirculation valve Y 18 Ter. D
(+ 5 volts)
to: wiring
harness plug, exhaust gas recirculation valve Y 18 Ter. 0
(actual value)
· Short
circuit in wiring harness
from: wiring
harness plug, exhaust gas recirculation valve Y 18 Ter. E
(+ 12 volts)
to: wiring
harness plug, exhaust gas recirculation valve Y 18 Ter. C
(actual value)
|
|
· Ignition
OFF
· Disconnect
control unit plug
· Using
multimeter, measure resistance:
to: wiring
harness plug, exhaust gas recirculation valve Y 18 Ter. C
to: control
unit plug K 57 Ter. D11
|
less than 2 W
|
· Lead
interruption
from: wiring
harness plug, exhaust gas recirculation valve Y 18 Ter. C
to: control
unit plug K 57 Ter. D 11
|
|
· Using
multimeter, measure resistance:
from: wiring
harness plug, exhaust gas recirculation valve Y 18 Ter. C
to: ground
|
greater than 100 kW
|
· Short
circuit in wiring harness
from: wiring
harness plug, exhaust gas recirculation valve Y 18 Ter. C
to: ground
|
|
· Using
multimeter, measure resistance:
from: wiring
harness plug, exhaust gas recirculation valve Y 18 Ter. B
to: control
unit plug K 57 Ter. D 2
|
less than 2 W
|
· Lead
interruption
from: wiring
harness plug, exhaust gas recirculation valve Y 18 Ter. B
to: control
unit plug K 57 Ter. D 2
|
|
· Connect
control unit plug
· Ignition
ON
· Measure
voltage:
from: wiring
harness plug, exhaust gas recirculation valve Y 18 Ter. D
to: ground
|
4.9 to 5.1 V
|
· Short
circuit in wiring harness
from: wiring
harness plug, exhaust gas recirculation valve Y 18 Ter. D
from: wiring
harness plug, exhaust gas recirculation valve Y 18 Ter. E
(+ 12 volts)
from: wiring
harness plug, exhaust gas recirculation valve Y 18 Ter. D
to: wiring
harness plug, exhaust gas recirculation valve Y 18 Ter. B
(ground, less than 0.1 V)
· Lead
interruption
from: wiring
harness plug, exhaust gas recirculation valve Y 18 Ter. D
to: control
unit plug K 57 Ter. B 8
|
|
· Measure
voltage:
from: wiring
harness plug, exhaust gas recirculation valve Y 18 Ter. B
to: ground
|
less than 0.1 V
|
· Short
circuit in wiring harness
from: wiring
harness plug, exhaust gas recirculation valve Y 18 Ter. B
from: wiring
harness plug, exhaust gas recirculation valve Y 18 Ter. E
(+ 12 volts)
from: wiring
harness plug, exhaust gas recirculation valve Y 18 Ter. D
(+ 5 volts)
|
|
· Remove
exhaust gas recirculation valve
· Using
multimeter, measure resistance:
from: exhaust
gas recirculation valve Y 18 Ter. C
|
|
|
|
to: exhaust
gas recirculation valve Y 18 Ter. B
|
1 kW ± 0.3 kW
|
|
|
to: exhaust
gas recirculation valve Y 18 Ter. D
|
4.0 kW ± 1.0 kW
|
· Exhaust
gas recirculation valve Y 18 defective
|
|
· Using
screwdriver, raise piston of exhaust gas recirculation valve from seat and
press until mechanical stop
· Using
multimeter, measure resistance:
from: exhaust
gas recirculation valve Y 18 Ter. C
|
|
|
|
to: exhaust
gas recirculation valve Y 18 Ter. B
|
4.5 kW ± 0.3 kW
|
· Exhaust
gas recirculation valve Y 18 defective
|
|
to: exhaust
gas recirculation valve Y 18 Ter. D
|
0.6 kW ± 0.1 kW
|
|
|
|
If nominal values attained
|
· Control
unit defective
|
|
|
|
|
|
|
|
|
