|
No.
|
TECH 1 Display
|
Conditions for
Checking
|
Nominal Value
|
Trouble Codes
|
Terminal
|
|
15
|
IDLE AIR CONTROL
|
Engine running at idle speed, operating temperature. If the
number of steps falls under 8 or exceeds 26 (at idle speed without load) for
a period of time longer than 10 s, the control unit resets the stepper motor
after ignition OFF. After waiting 5 s, restart engine. If, after this
procedure, the number of steps is less than 8 or higher than 26, begin
trouble-shooting.
If the number of steps is always near the 26 threshold (24
to 28), make sure that 26 steps are exceeded for longer than 10 s by
switching on a consumer (LAMP, REAR SCREEN HEATING, AUTOMATIC TRANSMISSION in
"D"). Then proceed as described above.
A stepper motor test is also carried out if the control
unit has been disconnected from the vehicle electrical system.
|
8 to 26 steps
|
35
|
C 5, C 6, 8, C 9/ D1
|
|
Trouble-shooting:
|
Nominal Value:
|
Cause of
Fault:
(If nominal
value is not attained)
|
|
· Slowly increase engine
speed to 4000 rpm by actuating the accelerator cable, maintain briefly and
then allow to sink to idle speed again.
· Wait approx. 5 sec.
(Astra-F C 14 SE)
· Ignition OFF, ignition ON
(Corsa-A/Nova, Corsa-B, Astra-F C 16 SE)
· Engine running at idle
speed, operating temperature
Astra-F C 16 SE
(Corsa-A/Nova, Corsa-B, Astra-F C 16 SE)
|
820 to 980
rpm
820 to 980
rpm
850 to 1010
rpm
|
· Carry out test step 06
|
|
· Select TECH 1 mode
"F8"
· Using arrow keys,
increase idle speed (1500 rpm) and decrease (1000 rpm)
|
Engine speed
increases and decreases.
|
· Throttle valve gap too
large or too small (basic adjustment may only be changed in emergencies, see
next page but one)
· Engine takes in dead air
· Trouble code 21 and 22
set
|
|
· Ignition OFF
· Disconnect plug from idle
speed adjuster M 66
· Ignition ON
· TECH 1 in mode
"F5" IDLE AIR CONTROL
· Measure voltage: (20V/AC)
from: wiring harness plug Ter. A
to: wiring harness plug Ter. C
and
from: wiring harness plug Ter. B
to: wiring harness plug Ter. D
|
A/C: 5.6 to
6.9 ~volts
B/D: 5.6 to
6.9 ~volts
|
· Lead interruption
from: stepper motor A, C, B, D
to: control unit Ter. C 9, C 5, C 8, C 6
|
|
· Ignition OFF
· Remove motor M 66
· Connect plug to idle
speed adjuster M 66
· Ignition ON
TECH 1 in mode "F5" IDLE AIR CONTROL
Compress pintle slightly with thumbs
|
Pintle moves
in and
out
noticeably
|
· Servo motor defective
|
|
· Ignition OFF
· Measure resistance of
coils A-B and C-D
(wiring
harness plug is disconnected)
|
|
· Servo motor defective
|
|
· Further causes
|
|
· Throttle valve gap too
large or too small
· Engine takes in dead air
· Seat of servo motor dirty
· Spark plugs defective
· Mixture too lean or too
rich
· Battery voltage too
high/low
· Odometer frequency sensor
/ instrument defective or circuit interrupted
· Dual-Info-Display
defective or short circuit to ground in odometer frequency sensor lead from
Dual-Info-Display to control unit K 57/K 91
|
|
|
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