可能原因：
正时变速器熔断器
变位器
发动机控制节点 (NCM)
检查确认
- Digital Multimeter
- Oscilloscope
- Box 150way (cod. xxxxxx –
HW01BOX)
- Motronic Interconnector
(cod. xxxxxxxx)
- Diagnosis system
+ -
Battery disconnected
ECU disconnected
1 A01 GND Electronic ground 1 (chassis) 200 Ω < 1Ω
2 A02 GND Electronic ground 2 (chassis) 200 Ω < 1Ω
3 A04 GND Electronic ground 3 (chassis) 200 Ω < 1Ω
4 A53 GND Reference Ground 200 Ω < 1Ω
5 A46 A01 GND signal from inertial
switch 200 Ω < 1Ω
6 B36 B51 Engine revolution sensor
impedance 2K Ω
1000Ω
±10%
7 A13 A64 Air flow temperature sensor
impedance (signal) 20k Ω 2kΩ±5%
8 A85 A64 Air flow sensor impedance
(signal) 2M Ω
270kΩ
±10%
9 B10 B14 Internal temperature sensor
(engine) 2M Ω
To temperature
environment
10 A15 A53 External temperature signal
(radiator) 2M Ω
To temperature
environment
11 A67 A01 C-CAN line isolation 2M Ω
12 A68 A01 C-CAN line isolation 2M Ω
13 A67 A68 Public C-CAN Network
impedance 200 Ω
60Ω
±5%
Battery disconnected
ECU connected
14 A67 A68 Public C-CAN Network
impedance 200 Ω
60Ω
±5%
-30°C = 40KΩ
130°C = 90Ω
- Key in STOP position.
- Disconnect power supply from the vehicle using battery disconnector.
- Connect power supply unit to battery in parallel.
- Check condition of protection fuses.
- Visually check the condition of the connections present on the wiring of the components being examined.
- Connect box (cod. xxxxxxxx), the 3 Male-Male cable bundles 50PIN and the Maserati interconnector (cod.
xxxxxxxxx) to the vehicle wiring, leaving the ECU disconnected.
Necessary
equipment
Preliminary
operations for
checks
N
Tester
Terminals
..\..\immagini\Ferrari_Cavallo.wmf
Maserati M139 4.7 RST - Engine Control Node (Motronic ME9)
../../immagini/NCM_CENTRALINA.jpg
DIAGNOSIS DATA SHEET N. 01
2,5KΩ
±10%
>1MΩ
Component / Check Operations Range and
U.M. Value Notes
018_0177_DX 1/5
+ -
N
Tester
Terminals Component / Check Operations Range and
U.M. Value Notes
Battery connected
ECU disconnected
15 A92 A01 Permanent power supply
(+30) 20 V= Vbat
B
