|
No.
|
TECH 1 Display
|
Conditions for
Checking
|
Nominal Value
|
Trouble Codes
|
Terminal
|
|
|
34
|
SPARK ADVANCE
|
Ignition ON
|
approx. 5° CA BTDC
(Astra - F)
approx.
10° CA BTDC
(Corsa - B)
|
-
|
D 10,
C 3 /D l
|
|
|
|
|
Engine running at idle speed, operating temperature
|
approx. 5° CA BTDC
(Astra - F)
approx.
6-8° -CA BTDC
(Corsa - B)
|
|
|
|
|
Trouble - shooting:
|
Nominal Value:
|
Cause of Fault:
(If nominal value is not attained)
|
|
|
· This
value is not an actually measured value; it is an ignition value taken from
the control unit. It is used primarily to improve understanding of the
system. All consumers should be switched off.
· If
the firing angle values read by TECH 1 deviate significantly from the
above nominal values, check various sensor input signals:
1. Intake manifold pressure sensor
2. Throttle valve potentiometer
3. Intake air temperature
4. Coolant temperature
5. Selector lever in position "P" or
"N" (AT)
6. Exhaust gas recirculation system
7. Controlled canister purge system
8. Knock control system
9. Ground connection, direct ignition system to
intake manifold
|
|
· Ignition
OFF
· Remove
inductive pulse pick - up plug P 35
· Connect
checking spark plugs to high voltage output 1 and 4
· Ignition
ON
· Pulse
control unit plug K 57 Ter. D 10 to battery +
|
Ignition spark visible at spark plug
|
· Lead
interruption
from: control
unit plug K 57 Ter. D 10
to: direct
ignition system L 2 Ter. 3
· Short
circuit to voltage
from: control
unit plug K 57 Ter. D 10
to: direct
ignition system L 2 Ter. 3
· Short
circuit to ground
from: control
unit plug K 57 Ter. D 10
to: direct
ignition system L 2 Ter. 3
· Direct
ignition system L 2 defective
(Test: see overleaf)
|
|
|
· Connect
checking spark plugs to high voltage output 2 and 3
· Pulse
control unit plug K 57 Ter. C 3 to battery +
|
Ignition spark visible at spark plug
|
· Lead
interruption
from: control
unit plug K 57 Ter. C 3
to: direct
ignition system L 2 Ter. 4
· Short
circuit to voltage
from: control
unit plug K 57 Ter. C 3
to: direct
ignition system L 2 Ter. 4
· Short
circuit to ground
from: control
unit plug K 57 Ter. C 3
to: direct
ignition system L 2 Ter. 4
· Direct
ignition system L 2 defective
(Test: see overleaf)
|
|
|
· Ignition
OFF
· Disconnect
direct ignition system wiring harness plug L 2
· Ignition
ON
· Measure
voltage:
from: direct
ignition system L 2 Ter. 1
to: ground
|
greater than 11 V
|
· Lead
interruption
from: direct
ignition system L 2 Ter. 1
to: ignition
lock S 1 Ter. 15
· Short
circuit to ground
from: direct
ignition system L 2 Ter. 1
to: ignition
lock S 1 Ter. 15
· Ignition
lock S 1 defective
|
|
|
· Measure
voltage:
from: direct
ignition system L 2 Ter. 1
to: direct
ignition system L 2 Ter. 2
|
greater than 11 V
|
· Lead
interruption
from: direct
ignition system L 2 Ter. 2
to: ground
· Short
circuit in wiring harness
from: direct
ignition system L 2 Ter. 2
to: battery +
|
|
|
· Connect
direct ignition system L 2 Ter. 1 to battery +
· Connect
direct ignition system L 2 Ter. 2 to ground
|
|
|
|
|
· Connect
checking spark plugs to high voltage output 1 and 4
· Pulse
direct ignition system L 2 Ter. 3 to battery +
|
Ignition spark visible at spark plug
|
· Direct
ignition system L 2 defective.
|
|
|
· Connect
checking spark plugs to high voltage output 2 and 3
· Pulse
direct ignition system L 2 Ter. 4 to battery +
|
Ignition spark visible at spark plug
|
· Direct
ignition system L 2 defective
|
|
|
|
If nominal values attained
|
· Control
unit defective
|
|
|
|
|
|
|
|
|
|
|
