|
No.
|
TECH 1 Display
|
Conditions for
Checking
|
Nominal Value
|
Trouble Codes
|
Terminal
|
|
05
|
MAP SENSOR
|
Ignition ON
Engine running at idle speed,
operating temperature
|
0.9 to 1.1 bar
4.26 to 5.0 V
(dependent on
altitude)
0.30 to 0.43 bar
1.1 to 1.65 V
|
33,34
|
B
8, A 7/
A 11
|
|
Trouble-shooting:
|
Nominal Value:
|
Cause of
Fault:
(If nominal
value is not attained)
|
|
· Ignition OFF
· Disconnect plug from
throttle valve potentiometer P 34.
· Disconnect plug from
intake manifold pressure sensor P 23.
· Ignition ON
|
0.1 bar
|
· 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
|
4.7 to 5.1 volts
|
· 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)
· Lead interruption
from: control
unit K 57/K 91 Ter. A 7 (input)
to: intake
manifold pressure sensor P 23 Ter. B
or
from: control
unit K 57/K 91 Ter. B 8 (+ 5 volts)
to: intake
manifold pressure sensor P 23 Ter. C
|
|
· Ignition OFF
· Connect throttle valve potentiometer
plug P 34
· Ignition ON
|
4.7 to 5.1 volts
|
· Throttle valve potentiometer P 34
defective
|
|
· Ignition OFF
· Disconnect coolant temperature sensor
plug P 30
· Using multimeter, measure voltage:
from: wiring
harness plug P 30 Ter. 1 (BR: brown)
to: intake
manifold pressure sensor plug P 23 Ter. A
|
Passage
(less than 3 W)
|
· Lead interruption
from: wiring
harness plug P 30 Ter. 1 (BR: brown)
to: intake
manifold pressure sensor plug P 23 Ter. A
|
|
· Test step 03: coolant
temperature
|
OK
|
· See: test step 03:
coolant temperature
|
|
· Reconnect plug P 23
Connect Vavuum Pump MKM-667 to hose of P 23
· Ignition OFF
· Ignition ON
|
Vacuum
display on vacuum pump
___________
0 bar
0.2 bar
0.4 bar
0.6 bar
|
volts display
on TECH 1
______________
4.7 to 5.1
volts
3.4 to 3.9
volts
2.3 to 2.8
volts
1.2 to 1.7
volts
|
· Control unit defective
· Intake manifold pressure
sensor defective
· Vacuum hose leaky or
blocked
|
|
|
|
|
|
|
|
|
|
|
