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No.
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System Components
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Fault Symptoms
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Nominal Value
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Trouble Codes
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Terminal
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02
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RELAY FOR
PRE-SUPPLY PUMP/ PRE-SUPPLY PUMP
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Engine does
not start or stalls during operation
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-
|
-
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Trouble-shooting
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Nominal Value
|
Cause of Fault:
(If nominal value is not
attained)
|
|
· Disconnect pre-supply
pump relay K16
· Ignition ON
|
Pre-supply
pump does not operate
|
· Short circuit to voltage
from: base of pre-supply pump relay K16 Ter. 8
to: fuel pump M21
|
|
· Using multimeter, measure
voltage
from: base of pre-supply pump relay K16 Ter. 2
to: ground
|
greater than
11 V
|
· Short circuit to ground/
circuit interruption
from: battery positive terminal Ter. 30
to: base of pre-supply pump relay K16 Ter. 2
|
|
· Bridge pre-supply pump
relay K16 with electrically fused jumper
from: base of pre-supply pump relay K16 Ter. 2
to: base of pre-supply pump relay K16 Ter. 8
|
Pre-supply
pump operates
Note:
The
pre-supply pump runs very quietly; the noise can be heard best when the tank
flap is opened.
|
· Fuse F18 defective
· Short circuit to ground
from: base of pre-supply pump relay K16 Ter. 8
to: fuel pump M21
· Circuit interruption
from: base of pre-supply pump relay K16 Ter. 8
to: fuel pump M21
· Circuit interruption
from: fuel pump M21
to: ground
· Fuel pump M21 defective
|
|
· Using multimeter, measure
voltage
from: base of pre-supply pump relay K16 Ter. 1
to: ground
· Ignition ON
· for approx. 10 to
15 s:
|
greater than
10 V
|
· Short circuit to ground
from: base of pre-supply pump relay K16 Ter. 1
to: base of preheater time relay K25 Ter. 1
· Circuit interruption
from: base of pre-supply pump relay K16 Ter. 1
to: base of preheater time relay K25 Ter. 1
· Fault in circuit for
preheater time relay K25 (cf. F0:DATA LIST, test steps 29 and 30)
|
|
· after approx. 15 s:
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lower than
0.1 V
|
· Short circuit to voltage
from: base of pre-supply pump relay K16 Ter. 1
to: base of preheater time relay K25 Ter. 1
· Fault in circuit for
preheater time relay K25 (cf. F0:DATA LIST, test steps 29 and 30)
|
|
· Using multimeter, measure
voltage
from: base of pre-supply pump relay K16 Ter. 6
to: ground
|
lower than
0.1 V
|
· Short circuit to voltage
from: base of pre-supply pump relay K16 Ter. 6
to: wiring harness plug for alternator G2 Ter. 61
to: wiring harness plug for instrument Ter. 13
· Fault in alternator
circuit
|
|
· Engine running at idle
speed
· Using multimeter, measure
voltage
from: base of pre-supply pump relay K16 Ter. 6
to: ground
|
greater than
11 V
|
· Short circuit to ground
from: base of pre-supply pump relay K16 Ter. 6
to: wiring harness plug for alternator G2 Ter. 61
· Circuit interruption
from: base of pre-supply pump relay K16 Ter. 6
to: wiring harness plug for alternator G2 Ter. 61
· Short circuit to ground
from: base of pre-supply pump relay K16 Ter. 6
to: wiring harness plug for instrument Ter. 13
· Fault in alternator
circuit
|
|
· Using multimeter, measure
voltage
from: base of pre-supply pump relay K16 Ter. 2
to: base of pre-supply pump relay K16 Ter. 4
|
greater than
11 V
|
· Circuit interruption
from: base of pre-supply pump relay K16 Ter. 4
to: ground
|
|
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If nominal
values are attained
|
· Pre-supply pump relay K16
defective
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