| |
Number of flashes |
Detectable fault modes |
Test step notes to PL 02/4 |
Possible causes |
| |
1 |
Control unit OK |
14 |
If the system is indicating despite a fault, the engine actuator line is open circuit |
| |
2 |
Control unit defective |
-- |
Engine actuator line was open circuit with drive switch ON .
Control unit defective |
| |
3 |
Actuator report (engine actuator potentiometer or safety switch) |
16
17
18 |
Potentiometer secondary connection to plus, minus or earth.
Adjustment mechanically |
| |
4 |
Pedal parameter sensor potentiometer 1 out of range |
19
20 |
Potentiometer 1 secondary connection to plus, minus or earth, or full load stop absent.
Fault at engine actuator potentiometer |
| |
5 |
Actuator fault (engine actuator potentiometer or safety switch) |
16
17
18 |
Position controller fault (actual value does not reach nominal value).
Engine actuator sticking.
Safety switch open circuit.
Adjustment mechanically (stops for actuator moved)
|
| |
6 |
Pedal parameter sensor potentiometers 1 and 2 |
13
19
20 |
Potentiometer 1 not the same as potentiometer 2 or line to potentiometers |
| |
7 |
Speed signal (v-pulse tacho) |
3 |
Speed signal open circuit or terminal on minus, earth or plus.
Tachometer defective |
| |
8 |
DKV/DKR (DKE) interface line between ABS/ASR gamma control unit and EFR 3 control unit |
24 |
Interface line open circuit, short circuit or circuit to earth or pulse width fault (signal incorrect) |
| |
9 |
Pedal parameter sensor potentiometer 2 |
13 |
Potentiometer 2 out of range.
Voltage supply incorrect (bridging resistance) |
| |
10 |
Vehicle speed controller (Tempomat switch) FGR fault |
21 |
Incorrect or no signal.
Two contacts on the Tempomat switch operated concurrently or negative acceleration greater than 1.5 m/s2 without braking signal |
| |
11 |
Engine actuator current consumption too high (maximum approx. 1.5A) |
14
15 |
Engine actuator line short circuit.
Engine actuator sticking.
Engine actuator winding terminal or different potential drop (> 0.5 volts) on the earth leads at pins 14 and 23 |
| |
12 |
Engine actuator learning fault |
17
18 |
Engine actuator setting (no load stop or full load stop absent or fitted incorrectly) |
| |
13 |
RPM signal fault (generator terminal W) |
4 |
RPM signal lead open circuit or short circuit.
Generator or rpm meter defective.
Speed signal present with rpm signal absent |
| |
14
(only EFR 3.3 B) |
Engine braking valve |
9 |
Solenoid defective, supply open circuit, fuse defective |
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