|
No.
|
TECH 1 Display
|
Conditions for
Checking
|
Nominal Value
|
Trouble Codes
|
Terminal
|
|
03
|
MAP SENSOR
|
Ignition ON
|
0.9 to 1.1 bar
4.26 to 5.0 V
(dependent on altitude)
|
33, 34
|
B 8,
A 7 /A 11
|
|
|
|
Engine running at idle speed, operating temperature
|
0.28 to 0.40 bar
1 to 1.58 V
|
|
|
|
Trouble - shooting:
|
Nominal Value:
|
Cause of Fault:
(If nominal value is not attained)
|
|
|
· Ignition
ON
Disconnect plugs from intake manifold pressure sensor P 23,
from throttle valve potentiometer P 34, from coolant temperature sensor
P 30 and from exhaust gas recirculation valve Y 18.
· Ignition
OFF
· Measure
voltage:
from: wiring
harness plug P 23 Ter. B
to: ground
|
less than 0.1 V
|
· Short
circuit in wiring harness
from: intake
manifold pressure sensor P 23 Ter. C (+ 5 volts)
to: intake
manifold pressure sensor P 23 Ter. B (input)
|
|
|
· Ignition
OFF.
· Bridge
intake manifold pressure sensor plug P 23:
from: wiring
harness plug Ter. C
to: wiring
harness plug Ter. B
· Ignition
ON
|
4.5 to 5.5 V
|
· Short
circuit in wiring harness
from: intake
manifold pressure sensor P 23 Ter. A (ground)
to: intake
manifold pressure sensor P 23 Ter. B (input)
· Short
circuit in wiring harness
from: intake
manifold pressure sensor P 23 Ter. A
to: intake
manifold pressure sensor P 23 Ter. C (+ 5 V)
· Lead
interruption
from: control
unit K 57 Ter. A 7 (input)
to: intake
manifold pressure sensor P 23 Ter. B
· Lead
interruption
from: control
unit K 57 Ter. B 8 (+ 5 volts)
to: intake
manifold pressure sensor P 23 Ter. C.
· Control
unit defective.
|
|
|
· Ignition
OFF
· Connect
throttle valve potentiometer 4.9 to 5.1 Vplug P 34
· Ignition
ON
|
|
· Fault
in circuit, throttle valve potentiometer P 34
|
|
|
· Ignition
OFF
· Connect
coolant temperature sensor plug P 30
· Ignition
ON
|
4.9 to 5.1 V
|
· Fault
in circuit, coolant temperature sensor P 30
|
|
|
· Ignition
OFF
· Connect
exhaust gas recirculation valve plug Y 18
· Ignition
ON
|
4.9 to 5.1 V
|
· Fault
in circuit, exhaust gas recirculation valve Y 18
|
|
|
· Ignition
OFF
· Using
multimeter, measure resistance:
from: control
unit K 57 Ter. A 1 1
to: intake
manifold pressure sensor plug P 23 Ter. A
|
less than 2 W
|
· Lead
interruption
from: control
unit K 57 Ter. A 11
to: intake
manifold pressure sensor plug P 23 Ter. A
|
|
|
· Reconnect
plug P 23.
Connect Vacuum Pump MKM - 667 to vacuum connection
of P 23.
· Ignition
OFF
· Ignition
ON
|
Voltage display Voltage display
on TECH 1 on TECH 1
0 bar 4.9 to
5.1 V
0.2 bar 3.4 to
3.9 V
0.4 bar 2.3 to
2.8 V
0.6 bar 1.2 to
1.7 V
|
· Vacuum
hose leaky or blocked
· Intake
manifold pressure sensor defective
· Control
unit defective
|
|
|
|
|
|
|
|
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