Multec (X 12 SZ / X 16 SZ) F0: DATA LIST
| No. | TECH 1 Display | Conditions for Checking | Nominal Value | Trouble Codes | Terminal |
|---|---|---|---|---|---|
| 25 | KNOCK PULSES | Engine running at idle speed, operating temperature | 18 | A 1 | |
| Engine running in partial load range, operating temperature | Counter must not change | ||||
| Full load (5th gear, 1000 rpm) | Counter must change | ||||
| Trouble - shooting: | Nominal Value: | Cause of Fault: |
(If nominal value is not attained)
· Ignition OFF
· Using multimeter, measure resistance:
from: wiring harness plug P 46 (sensor side)
to: ground
| approx. 4 kW | · Knock sensor P 46 defective |
· Disconnect plug from knock sensor P 46
· Start engine
· Measure voltage:
from: wiring harness plug P 46 (sensor side)
to: ground
| greater than 20 mV | · Lead interruption |
from: knock sensor P 46
to: ground (transfer resistance)
| · Knock sensor defective |
· Disconnect plug from knock module V 14
· Ignition ON
· Measure voltage:
from: wiring harness plug P 46 (wiring harness side)
| to: ground | greater than 4.5 V | · Lead interruption |
from: control unit plug K 57 Ter. D 3
to: knock sensor P 46
· Short circuit in wiring harness
from: wiring harness plug P 46
to: battery + (+ 12 V)
· Short circuit in wiring harness
from: wiring harness plug P 46
to: ground (less than 0.1 V)
· Measure voltage:
from: wiring harness plug V 14 (wiring harness side) Ter. E
| to: ground | greater than 4.5 V | · Lead interruption |
from: control unit plug K 57 Ter. D 3
to: knock module V 14 Ter. E
· Short circuit in wiring harness
from: wiring harness plug V 14 Ter. E
to: battery + (+ 12 V)
· Short circuit in wiring harness
from: wiring harness plug V 14 Ter. E
to: ground (less than 0.1 V)
· Ignition OFF
· Measure voltage:
from: wiring harness plug, knock module V 14 Ter. B
to: ground
| less than 0.1 V | · Short circuit in wiring harness |
from: wiring harness plug, knock module V 14 Ter. B
| to: battery + |
· Ignition ON
· Measure voltage:
from: wiring harness plug, knock module V 14 Ter. B
| to: ground | greater than 11 V | · Short circuit in wiring harness |
from: wiring harness plug, knock module V 14 Ter. B
to: ground
· Lead interruption
from: wiring harness plug, knock module V 14 Ter. B
to: ignition lock S 1 Ter. 15
· Measure voltage:
from: wiring harness plug, knock module V l4 Ter, B
| to: wiring harness plug, knock module V 14 Ter. D | greater than 11 V | · Short circuit in wiring harness |
from: wiring harness plug, knock module V 14 Ter. D
to: battery + (Ter. 15 or Ter. 30)
· Lead interruption
from: wiring harness plug, knock module V 14 Ter. D
to: ground
· Ignition OFF
· Disconnect plug K 57
· Using multimeter, measure resistance:
from: wiring harness plug, knock module V 14 Ter. C
to: control unit K 57 Ter. A 1
| less than 2 W | · Lead interruption |
from: wiring harness plug, knock module V 14 Ter. C
| to: control unit K 57 Ter. A 1 |
· Using multimeter, measure resistance:
from: wiring harness plug, knock module V 14 Ter. C
to: wiring harness plug, knock module V 14 Ter. D
| greater than 100 kW | · Short circuit in wiring harness |
from: wiring harness plug, knock module V 14 Ter. C
| to: ground |
· Using multimeter, measure resistance:
from: wiring harness plug, knock module V 14 Ter. C
to: wiring harness plug, knock module V 14 Ter. B
| greater than 100 kW | · Short circuit in wiring harness |
from: wiring harness plug, knock module V 14 Ter. C
to: ignition lock S 1 Ter. 15
· Check knock module V 14
· Ignition OFF
· Disconnect control unit plug
Connect knock module wiring harness plug V 14
· Ignition ON
· Measure voltage:
from: control unit plug Ter. A 1
to: ground
| greater than 10 V | · Knock module V 14 defective. |
· Pulse control unit plug Ter. D 3 to battery +
· Measure voltage:
from: control unit plug Ter. A 1
to: ground
| less than 10 V | · Knock module V 14 defective. |
|---|---|
| If nominal values attained | |
| · Control unit defective |