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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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14
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SPARK ADVANCE
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Switch off all electrical consumers
Engine running at idle speed, operating temperature
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-5 to 15 °CA BTDC
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41, 42, 63, 64
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E14, F14
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Notes on
Trouble-shooting:
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Nominal
Value:
|
Cause of
fault:
(If nominal
value is not attained)
|
|
· This is not an
actual measured value, but rather an ignition value taken from the engine
control unit.
· If the firing
angle values read off with TECH 1 deviate significantly from the above
nominal values, check the following input signals:
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· All consumers
switched off
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· TECH 1
data list no. 05
TPS SIGNAL
· TECH 1
data list no. 06
MAP SENSOR
· TECH 1
data list no. 07
COOLANT TEMP.
· TECH 1
data list no. 08
INTAKE AIR
TEMP.
· TECH 1
data list no. 15
KNOCK VOLTAGE to
no. 21
KNOCK
RTD. CYL.4
· TECH 1
data list no. 24
EGR
POSITION CMD to no. 25
EGR POS. FDBK
· TECH 1
data list no. 26
FUEL TANK
VENT.
· 5.3 additional
fault diagnosis 01
camshaft sensor
|
OK
OK
OK
OK
OK
OK
OK
OK
|
· Remedy
according to data list no. 05
TPS SIGNAL
· Remedy
according to data list no. 06
MAP SENSOR
· Remedy
according to data list no. 07
COOLANT TEMP.
· Remedy
according to data list no. 08
INTAKE AIR
TEMP.
· Remedy
according to data list no. 15
KNOCK VOLTAGE to
no. 21
KNOCK
RTD. CYL.4
· Remedy
according to data list no. 24
EGR
POSITION CMD to no. 25
EGR POS. FDBK
· Remedy according
to data list no. 26
FUEL TANK
VENT.
· Remedy
according to 5.3 additional fault diagnosis 01 camshaft sensor
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PART A:
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· Ignition OFF
· Disconnect
wiring harness plug from:
L2 direct ignition module
· Ignition ON
· Using
multimeter, measure voltage:
from: L2 wiring harness plug for direct ignition
module Ter. 1
to: ground
|
higher than 11 V
|
· Short circuit
to ground or lead interruption
from: L2 wiring harness plug for direct ignition
module Ter. 1
to: S1 ignition lock Ter. 15
· S1 ignition
lock defective.
|
|
· Using
multimeter, measure voltage:
from: L2 wiring harness plug for direct ignition
module Ter. 1
to: L2 wiring harness plug for direct ignition
module Ter. 2
|
higher than 11 V
|
· Short circuit
to voltage or circuit interruption
from: L2 wiring harness plug for direct ignition
module Ter. 2
to: ground
|
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· Bridge wiring
harness plug
from: L2 direct ignition module Ter. 1
to: L2 wiring harness plug for direct ignition
module Ter. 1
and
from: L2 direct ignition module Ter. 2
to: L2 wiring harness plug for direct ignition
module Ter. 2
· Connect
checking spark plugs to high voltage outputs 1 and 4
· Pulse L2 direct
ignition module Ter. 3 to battery +
|
Ignition spark visible at checking spark plug
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· L2 direct
ignition module defective.
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· Connect
checking spark plugs to high voltage outputs 2 and 3
· Pulse L2 direct
ignition module Ter. 4 to battery +
|
Ignition spark visible at checking spark plug
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· L2 direct
ignition module defective.
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PART B:
|
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· Ignition OFF
· Disconnect
wiring harness plug from:
K57 engine control unit
· Connect wiring
harness plug:
L2 direct ignition module
· Ignition ON
· Connect
checking spark plugs to high voltage outputs 2 and 3
· Pulse K57 wiring
harness plug for engine control unit Ter. F14 to battery +
|
Ignition spark visible at checking spark plug
|
· Short circuit
to ground / voltage or circuit interruption
from: K57 wiring harness plug for engine control unit
Ter. F14
to: L2 wiring harness plug for direct ignition
module Ter. 4
|
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· Connect
checking spark plugs to high voltage outputs 1 and 4
· Pulse K57
wiring harness plug for engine control unit Ter. E14 to battery +
|
Ignition spark visible at checking spark plug
|
· Short circuit
to ground / voltage or circuit interruption
from: K57 wiring harness plug for engine control unit
Ter. E14
to: L2 wiring harness plug for direct ignition
module Ter. 3
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· Check spark
plugs
· Check spark
plug connectors
· Check high
voltage cables
|
OK
OK
OK
|
· Spark plugs
defective
· Spark plug
connectors defective
· High voltage
cable defective
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· Check control
unit calibration, see field remedy measures
|
Latest program memory (EPROM) according to field remedy
measures or TIs
|
· Replace program
memory (EPROM) according to field remedy measures or TIs
· Repeat test
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If nominal values are attained and the latest program memory is
installed
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· K57 engine
control unit defective
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