Multec- S X 14 XE / X 16 XE (L) F0:DATA LIST
| No. | TECH 1 Display | Conditions for Checking | Nominal Value | Trouble Codes | Terminal |
|---|---|---|---|---|---|
| 34 | ENGINE SPEED | Ignition ON | |||
| Engine running at idle speed, operating temperature | 0 rpm | ||||
| 35, 19 | B14 / A16 | ||||
| X 14 XE MT: | 850 to 950 rpm | ||||
| X 16 XE MT: | 825 to 975 rpm | ||||
| X 16 XEL MT: | 700 to 1000 rpm | ||||
| X 14 XE AT: | |||||
| selector lever position "P" | 850 to 950 rpm | ||||
| X 14 XE AT: | |||||
| selector lever position "D" | 725 to 825 rpm |
The ENGINE SPEED at idle speed is dependent on various input signals and on the control unit programming. If the actual value is not within the nominal values, first check the following signals.
| Notes on Trouble-shooting: | Nominal Value: | Cause of fault: |
(If nominal value is not attained)
· Check following nominal values:
· 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. 27
O2 SENSOR
· TECH 1 data list no. 30
O2 INTEGRATOR
· TECH 1 data list no. 31
O2 BLM ENABLE
· TECH 1 data list no. 32
O2 BLM CELL NO.
· TECH 1 data list no. 33
| O2 BLM CELL CONT | 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. 27
O2 SENSOR
· Remedy according to data list no. 30
O2 INTEGRATOR
· Remedy according to data list no. 31
O2 BLM ENABLE
· Remedy according to data list no. 32
O2 BLM CELL NO.
· Remedy according to data list no. 33
O2 BLM CELL CONT
· Ignition OFF
· Disconnect wiring harness plug from:
P35 crankshaft pulse pick- up K57 engine control unit
· Ignition ON
· Using multimeter, measure voltage:
from: P35 wiring harness plug for crankshaft pulse pick- up Ter. 1 and Ter. 2
to: ground
| lower than 0.1 V |
|---|
| · Short circuit to voltage |
from: K57 wiring harness plug for engine control unit Ter. B14 and A16
to: P35 wiring harness plug for crankshaft pulse pick- up Ter. 1 and Ter. 2
· Using multimeter, measure resistance:
from: P35 wiring harness plug for crankshaft pulse pick- up Ter. 1 and Ter. 2
| to: ground | higher than 100 kW (¥) | · Short circuit to ground |
from: P35 wiring harness plug for crankshaft pulse pick- up Ter. 1 and Ter. 2
to: K57 wiring harness plug for engine control unit Ter. B14 and Ter. A16
· Using multimeter, measure resistance:
from: P35 wiring plug for crankshaft pulse pick- up Ter. 3
to: ground
| lower than 2 W |
|---|
| · Circuit interruption |
from: P35 wiring harness plug for crankshaft pulse pick- up Ter. 3
to: ground
· Using multimeter, measure resistance:
from: P35 wiring plug for crankshaft pulse pick- up Ter. 1
| to: K57 wiring harness plug for engine control unit Ter. B14 | lower than 2 W | · Circuit interruption |
from: P35 wiring harness plug for crankshaft pulse pick- up Ter. 1
to: K57 wiring harness plug for engine control unit Ter. B14
· Using multimeter, measure resistance:
from: P35 wiring harness plug for crankshaft pulse pick up Ter. 2
to: K57 wiring harness plug for engine control unit Ter. A16
| lower than 2 W | · Circuit interruption |
from: P35 wiring plug for crankshaft pulse pick- up Ter. 2
to: K57 wiring harness plug for engine control unit Ter. A16
· Using multimeter, measure resistance:
from: P35 wiring harness plug for crankshaft pulse pick- up Ter. 1
to: P35 wiring harness plug for crankshaft pulse pick- up Ter. 2
| approx. 0.5 kW | · P35 crankshaft pulse pick- up defective |
· Ignition ON
· At starter speed Using multimeter, measure alternating voltage (AC ~)
from: P35 crankshaft pulse pick- up Ter. 1
to: P35 crankshaft pulse pick- up Ter. 2
| higher than 1 V (AC ~) | · P35 crankshaft pulse pick- up defective |
· Further causes of fault:
| · Burr on increment disc (58- tooth disc) |
· Distance from inductive pulse pick- up up to increment disc incorrect.
(See Service Instructions)
| · 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 | ||
| If nominal values are attained and latest program memory is installed | · K57 engine control unit defective | |
| · Further causes of fault when idle speed is too high or irregular. | · Loose contact in P34 throttle valve potentiometer |
· Throttle valve shaft worn out
· Throttle valve gap too large or too small, (change basic setting in emergencies only, see Service Instructions)
· Fault in tank vent system
· Engine takes in dead air
· Seat of M66 idle speed stepper motor dirty
· Spark plugs defective
· Mixture too lean or too rich
· Battery voltage too high / low
| · Odometer frequency sensor / instrument defective or circuit interrupted |