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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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43
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IDLE AIR CONTROL
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Engine running at idle speed, operating temperature
If a certain regulating range of the idle speed adjuster is
exceeded with the engine at operating temperature at idle speed, the control
unit automatically resets the stepper motor at an engine speed higher than
3000 rpm.
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8 to 35 steps
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35
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A1, A2, A3, A4
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Notes on
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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· Slowly
increase engine speed to 4000 rpm, maintain briefly and allow to
decrease to idle speed again.
· Wait approx. 5
sec.
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· TECH 1
data list no. 34
ENGINE SPEED
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820 to 980 rpm
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· Check according
to data list no.05 TPS SIGNAL
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· Select
TECH 1 menu:
F8:ECU CONTROL,
RPM CONTROL
· Using arrow
keys, increase idle speed (1500 rpm) and decrease (900 rpm)
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Engine speed increases and decreases according to TECH 1
selection.
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· Engine takes in
dead air.
· Throttle valve
gap too large or too small (alter basic setting in emergencies only, see
Service Instructions).
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· Ignition OFF
· Disconnect
wiring harness plug:
X10 plug, engine & injectors
· Ignition ON
· Select
TECH 1 menu:
F5:ACTUATOR
TEST
IDLE
AIR CONTR
· Actuator test:
Using multimeter, measure alternating voltage
(AC ~)
Corsa-B, Tigra:
from: X10
plug, engine & injectors Ter. 14 (control unit side)
to: X10
plug, engine & injectors Ter. 18 (control unit side)
and
from: X10
plug, engine & injectors Ter. 19 (control unit side
to: X10
plug, engine & injectors Ter. 20 (control unit side)
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higher than 11 V (AC ~)
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· Short circuit
to voltage or short circuit to ground/circuit interruption
Corsa-B, Tigra:
from: X10
plug, engine & injectors Ter. 14 and 18 (control unit side)
to: K57
wiring harness plug for engine control unit Ter. A4 and A3
or
from: X10
plug, engine & injectors Ter. 19 and 20 (control unit side)
to: K57
wiring harness plug for engine control unit Ter. A2 and A1
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Astra- F:
from: X10
plug, engine & injectors Ter. 9 (control unit side)
to: X10
plug, engine & injectors Ter. 10 (control unit side)
and
from: X10
plug, engine & injectors Ter. 11 (control unit side)
to: X10
plug, engine & injectors Ter. 12 (control unit side)
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higher than 11 V (AC ~)
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Astra- F:
from: X10
plug, engine & injectors Ter. 9 and Ter. 10 (control unit side)
to: K57
wiring harness plug for engine control unit Ter. A4 and A3
or
from: X10
plug, engine & injectors Ter. 12 and 11 (control unit side)
to: K57
wiring harness plug for engine control unit Ter. A2 and A1
· K57 engine
control unit defective.
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· Using
multimeter, measure voltage
from: X10
plug, engine & injectors Ter. 14 and 18 (component side) (Corsa-B,
Tigra)
from: X10
plug, engine & injectors Ter. 9 and 10 (component side) (Astra-F)
to: ground
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lower than 0.1 V
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· Short circuit
to voltage
from: X10
plug, engine & injectors Ter. 14 (component side) (Corsa-B, Tigra)
to: X10
plug, engine & injectors Ter. 18 (component side) (Corsa-B, Tigra)
or
from: X10
plug, engine & injectors Ter. 9 (component side) (Astra-F)
to: X10
plug, engine & injectors Ter. 10 (component side) (Astra-F)
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· Ignition OFF
· Using
multimeter, measure resistance:
from: X10
plug, engine & injectors Ter. 14 and 18 (component side) (Corsa-B,
Tigra)
from: X10
plug, engine & injectors Ter. 9 and 10 (component side) (Astra-F)
to: ground
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higher than 100 kW
(¥)
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· Short circuit
to ground
from: X10
plug, engine & injectors Ter. 14 (component side) (Corsa-B, Tigra)
to: X10
plug, engine & injectors Ter. 18 (component side) (Corsa-B, Tigra)
or
from: X10
plug, engine & injectors Ter. 9 (component side) (Astra-F)
to: X10
plug, engine & injectors Ter. 10 (component side) (Astra-F)
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· Using
multimeter, measure resistance:
Corsa-B, Tigra:
from: X10
plug, engine & injectors Ter. 14 (component side)
to: X10
plug, engine & injectors Ter. 18 (component side)
and
from: X10
plug, engine & injectors Ter. 20 (component side)
to: X10
plug, engine & injectors Ter. 19 (component side)
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45 W to 70 W
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· Circuit
interruption between measuring points
· M66 idle speed
stepper motor defective
|
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Astra- F:
from: X10
plug, engine & injectors Ter. 9 (component side)
to: X10
plug, engine & injectors Ter. 10 (component side)
and
from: X10
plug, engine & injectors Ter. 11 (component side)
to: X10
plug, engine & injectors Ter. 12 (component side)
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· Further causes
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· Loose contact
in P34 throttle valve potentiometer
· Throttle valve
shaft worn out
· Throttle valve
gap too large of too small, (alter basic setting in emergencies only, see
Service Instructions).
· Engine takes in
dead air.
· Seat of M66
idle speed stepper motor dirty.
· Fault in tank
vent system
· Spark plugs
defective
· Mixture too
lean or too rich.
· Battery voltage
too high / low
· Odometer
frequency sensor / instrument defective or circuit defective.
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