Section 18.2
Motor Control Module
The engine mounted Motor Control Module (MCM) includes control logic to provide overall engine management. See Figure "Motor Control Module" .
|
1. 21–pin Connector (OEM Responsibility) |
2. 120–pin Connector (Detroit Diesel Responsibility) |
Figure 1. Motor Control Module
Note: Do NOT ground the MCM housing. This can result in false codes being logged.
Section 18.2.1
MBE 900 Engine Harness
The MCM has a 120–pin connector Engine Harness which is factory installed. It also has a 21–pin connector and 31–pin connector which are the responsibility of the OEM. The pinouts for the 120–pin connector for the MBE 900 engine are listed in Table "MCM Connector – MBE 900 (1 of 4)" , Table "MCM Connector – MBE 900 (2 of 4)" , Table "MCM Connector – MBE 900 (3 of 4)" , and Table "MCM Connector – MBE 900 (4 of 4)" .
|
Pin |
Function |
Connector |
|
1 |
NC |
|
|
2 |
NC |
|
|
3 |
NC |
|
|
4 |
Electronic Unit Pump (cyl 4) – pin 1 |
|
|
5 |
Electronic Unit Pump Common (cyl 4) – pin 2 |
|
|
6 |
Electronic Unit Pump(cyl 6) – pin 1 |
|
|
7 |
Electronic Unit Pump Common (cyl 6) – pin 2 |
|
|
8 |
Electronic Unit Pump (cyl 5) – pin 1 |
|
|
9 |
Electronic Unit Pump Common (cyl 5) – pin 2 |
|
|
10 |
Electronic Unit Pump (cyl 2) – pin 1 |
 |
|
11 |
Electronic Unit Pump Common (cyl 2) – pin 2 |
|
|
12 |
Electronic Unit Pump (cyl 3) – pin 1 |
|
|
13 |
Electronic Unit Pump Common (cyl 3) – pin 2 |
|
|
14 |
Electronic Unit Pump (cyl 1) – pin 1 |
|
|
15 |
Electronic Unit Pump Common (cyl 1) – pin 2 |
|
|
16 |
Injector (cyl 4) – pin 1 |
|
|
17 |
Injector Common (cyl 4) – pin 2 |
|
|
18 |
Injector (cyl 6) – pin 1 |
|
|
19 |
Injector Common (cyl 6) – pin 2 |
|
|
20 |
Injector (cyl 5) – pin 1 |
|
|
21 |
Injector Common (cyl 5) – pin 2 |
|
|
22 |
Injector (cyl 2) – pin 1 |
|
|
23 |
Injector Common (cyl 2) -– pin 2 |
|
|
24 |
Injector (cyl 3) – pin 1 |
|
|
25 |
Injector Common (cyl 3) – pin 2 |
|
|
26 |
Injector (cyl 1) – pin 1 |
|
|
27 |
Injector Common (cyl 1) – pin 2 |
|
|
28 |
NC |
|
|
29 |
DOC Outlet Temp Sensor |
|
|
30 |
DPF Outlet Pressure Sensor |
|
Pin |
Function |
Connector |
|
31 |
NC |
|
|
32 |
Constant Throttle Valve |
|
|
33 |
Two-speed Fan or Variable Speed Fan |
|
|
34 |
NC |
|
|
35 |
NC |
|
|
36 |
NC |
|
|
37 |
NC |
|
|
38 |
Ground |
|
|
39 |
Electrostatic Oil Separator |
|
|
40 |
NC |
|
|
41 |
Grid Heater |
|
|
42 |
NC |
|
|
43 |
CKP (+) |
|
|
44 |
NC |
|
|
45 |
CMP (+) |
|
|
46 |
NC |
|
|
47 |
Fan Speed |
|
|
48 |
CMP (-) |
|
|
49 |
NC |
|
|
50 |
Sensor Ground |
|
|
51 |
Turbo Speed Sensor |
|
|
52 |
Sensor Ground |
|
|
53 |
NC |
|
|
54 |
Engine Oil Pressure Sensor |
|
|
55 |
Sensor Ground |
|
|
56 |
NC |
|
|
57 |
Water-in-Fuel Sensor |
|
|
58 |
Sensor Power Supply |
|
|
59 |
NC |
|
|
60 |
EGR Throttle Position |
|
Pin |
Function |
Connector |
|
61 |
EGR Valve |
|
|
62 |
Power Supply |
|
|
63 |
NC |
|
|
64 |
Power Supply |
|
|
65 |
Doser |
|
|
66 |
NC |
|
|
67 |
Ground |
|
|
68 |
NC |
|
|
69 |
Fuel Cutoff Valve |
|
|
70 |
NC |
|
|
71 |
NC |
|
|
72 |
NC |
|
|
73 |
CKP (-) |
|
|
74 |
Wastegate CAN (-) |
|
|
75 |
Wastegate CAN (+) |
|
|
76 |
NC |
|
|
77 |
Supply Fuel Temperature Sensor |
|
|
78 |
NC |
|
|
79 |
Grid Heater |
|
|
80 |
NC |
|
|
81 |
NC |
|
|
82 |
Sensor Power Supply |
|
|
83 |
NC |
|
|
84 |
Fuel Compensation Pressure Sensor |
|
|
85 |
Sensor Power Supply |
|
|
86 |
Turbo Pressure/Temperature Sensor |
|
|
87 |
Intake Manifold Pressure Sensor |
|
|
88 |
Sensor Ground |
|
|
89 |
DOC Inlet Temp Sensor |
|
|
90 |
Intake Air Throttle Position |
|
Pin |
Function |
Connector |
|
91 |
Power Supply (Engine Brake, Fan) |
|
|
92 |
High Tech Grid Heater |
|
|
93 |
Power Supply |
|
|
94 |
NC |
|
|
95 |
Ground |
|
|
96 |
Exhaust Brake |
|
|
97 |
NC |
|
|
98 |
Single-speed Fan or Two-speed Fan |
|
|
99 |
NC |
|
|
100 |
Intake Air Throttle 5 kHz (+) |
|
|
101 |
Intake Air Throttle 5 kHz (-) |
|
|
102 |
NC |
|
|
103 |
Sensor Ground |
|
|
104 |
Sensor Ground |
|
|
105 |
Sensor Ground |
|
|
106 |
Intake Manifold Pressure Sensor |
|
|
107 |
Diagnostic Electrostatic Oil Separator |
|
|
108 |
Engine Oil Temperature Sensor |
|
|
109 |
EGR Delta Pressure Sensor |
|
|
110 |
Engine Coolant Temp Sensor |
|
|
111 |
Fuel Line Pressure Sensor |
|
|
112 |
Intake Air Temperature Sensor |
|
|
113 |
NC |
|
|
114 |
Sensor Ground |
|
|
115 |
DPF Outlet Temp Sensor |
|
|
116 |
NC |
|
|
117 |
Sensor Power Supply |
|
|
118 |
DPF Inlet Pressure Sensor |
|
|
119 |
NC |
|
|
120 |
Turbo Compressor Temperature Sensor |
Section 18.2.2
Connector Brackets
The harnesses on MCM must be bracketed and held secure. The bracket design will change for different engines as the routing is different. The 120–pin connector and the 21-pin connector must be tie-wrapped to the brackets as shown in the following drawing for the MBE engines (see Figure "120–pin Connector and 21–pin Connector Tie-wrapped to Brackets" ).
Figure 2. 120–pin Connector and 21–pin Connector Tie-wrapped to Brackets
Section 18.2.3
MCM 21–pin and 31–pin Connectors
The wiring for the VIH 21–pin to the MCM is listed in Table "21–Pin Connector to the MCM" . The side of the connector shown is looking into the pins.
|
Pin |
Signal Type |
Function |
Connector |
|
21/1 |
CAN2L |
Not Used |
 Front Looking into the Pins on the Harness |
|
21/2 |
CAN2GND |
Not Used |
|
|
21/3 |
CAN2H |
Not Used |
|
|
21/4 |
CAN2GND |
Not Used |
|
|
21/5 |
KL31 |
Battery (-) |
|
|
21/6 |
KL31 |
Battery (-) |
|
|
21/7 |
KL15 |
IGN |
|
|
21/8 |
KL31 |
Battery (-) |
|
|
21/9 |
KL31 |
Battery (-) |
|
|
21/10 |
CAN1GND |
Engine CAN Shield |
|
|
21/11 |
KL30 |
Battery (+) |
|
|
21/12 |
KL30 |
Battery (+) |
|
|
21/13 |
CAN1H |
Engine CAN + |
|
|
21/14 |
KL30 |
Battery (+) |
|
|
21/15 |
KL30 |
Battery (+) |
|
|
21/16 |
CAN1GND |
Not Used |
|
|
21/17 |
BOOT |
Not Used |
|
|
21/18 |
KDiag_S |
Not Used |
|
|
21/19 |
CAN1L |
Engine CAN – |
|
|
21/20 |
KL50 |
Crank Start Input |
|
|
21/21 |
START_B |
Crank Activation Output |
The pinout for the 31–pin pigtail on the Engine Harness is listed in Table "31–pin MCM Pigtail Connector" . The OEM is responsible for wiring to this connector.
|
31–pin |
120–pin |
Function |
MBE 900 |
|
31/1 |
— |
Spare |
— |
|
31/2 |
— |
Power Supply (IGN)* |
— |
|
31/3 |
— |
Fuel Heater Supply #1† |
X |
|
31/4 |
— |
Spare |
— |
|
31/5 |
— |
Full Heater Supply #2† |
X |
|
31/6 |
— |
Spare |
— |
|
31/7 |
— |
Power Supply Ground* |
— |
|
31/8 |
120/70 |
Ether Start |
— |
|
31/9 |
120/33 |
Fan Control #2 – High of Two-speed Fan or Variable Speed Fan |
X |
|
31/10 |
120/98 |
Single Speed Fan or Low for Two-speed Fan |
X |
|
31/11 |
— |
Fuel Heater Ground #1† |
X |
|
31/12 |
— |
Spare |
— |
|
31/13 |
— |
Spare |
— |
|
31/14 |
120/71 |
Water-in-Fuel Sensor Supply |
X |
|
31/15 |
120/67 |
Water-in-Fuel Sensor Ground |
X |
|
31/16 |
120/96 |
Engine Brake Solenoid Control |
X |
|
31/17 |
120/29 |
DOC Outlet Temp Sensor (Exhaust Gas Temperature in Front of Particulate Trap) |
X |
|
31/18 |
120/89 |
DOC Inlet Temp Sensor |
X |
|
31/19 |
120/115 |
DPF Outlet Temp Sensor( Exhaust Gas Temperature After Particulate Trap) |
X |
|
31/20 |
— |
Full Heater Ground #2† |
X |
|
31/21 |
— |
Spare |
— |
|
31/22 |
120/91 |
Power Supply (Eng Brk, Fan, Ether) |
X |
|
31/23 |
120/47 |
Fan Speed |
X |
|
31/24 |
120/88 |
Sensor Ground |
X |
|
31/25 |
120/59 |
HDMS Fan Thermal Switch |
— |
|
31/26 |
120/57 |
Water-in-Fuel Sensor |
X |
|
31/27 |
120/86 |
TCI Temp |
— |
|
31/28 |
120/114 |
Sensor Ground |
X |
|
31/29 |
120/85 |
Sensor Supply |
X |
|
31/30 |
120/30 |
DPF Outlet Pressure Sensor (Exhaust Gas Pressure After Particulate Filter) |
X |
|
31/31 |
120/118 |
DPF Inlet Pressure Sensor (Exhaust Gas Pressure Before Particulate Filter) |
X |
*Fused at 15 amps
† Optional for MBE 900 and HDE. Must use 14 AWG wire and fuse at 30A.
Section 18.2.4
DPF Harness
The Aftertreatment Device (ATD) configuration includes a Diesel Oxidation Catalyst (DOC) and a Diesel Particulate Filter (DPF). See Figure "Aftertreatment Device" .
|
1. Diesel Oxidation Catalyst |
5. DPF Outlet Temperature Sensor |
|
2. DOC Inlet Temperature Sensor |
6. Diesel Particulate Filter |
|
3. DOC Outlet Temperature Sensor |
7. A= Engine Exhaust Inlet |
|
4. Sensor Junction Box |
8. B= Exhaust Outlet |
Figure 3. Aftertreatment Device
The ATD may be horizontally or vertically mounted depending on the vehicle chassis configuration. See Figure "Typical Mounting Views of an Aftertreatment Device" for a typical mounting view of the ATD.
Figure 4. Typical Mounting Views of an Aftertreatment Device
The wiring for the DPF Harness is determined by the ATD mount position.
Section 18.2.4.1
DPF Harness – Vertical Mount ATD (31-pin to 10 pin connector)
See Figure "Vertical and Under Step Mount ATD Wiring — OEM Responsibility" for the DPF Harness wiring for vertical mount ATDs.
Figure 5. Vertical and Under Step Mount ATD Wiring — OEM Responsibility
The wiring for the 10–pin DPF connector is listed in Table "DPF 10–pin Connector" .
|
Pin |
Function |
Connector |
|
1 |
Sensor Ground |
 |
|
2 |
Sensor Supply |
|
|
3 |
DPF Inlet Pressure Sensor (Exhaust Gas Pressure Before Particulate Filter) |
|
|
4 |
DPF Outlet Pressure Sensor (Exhaust Gas Pressure After Particulate Filter) |
|
|
5 |
DOC Outlet Temperature Sensor (Exhaust Gas Temp in Front of Particulate Trap) |
|
|
6 |
DOC Inlet Temperature Sensor |
|
|
7 |
DPF Outlet Temperature Sensor( Exhaust Gas Temp After Particulate Trap) |
|
|
8 |
Sensor Ground |
|
|
9 |
Plug |
|
|
10 |
Plug |
Section 18.2.4.2
DPF Harness – Horizontal Mount ATD (31-pin to 10-pin Connector/2-pin Connector)
See Figure "Horizontal Mount ATD Wiring — OEM Responsibility" for the DPF Harness wiring for horizontal mount ATDs.
Figure 6. Horizontal Mount ATD Wiring — OEM Responsibility
The wiring for the DPF 10–pin connector and 2–pin connector is listed in Table "DPF 10–pin Connector and 2–pin Connector — Horizontal Mount ATD" .
|
Pin |
Function |
Connector |
|
1 |
Sensor Ground |
|
|
2 |
Sensor Supply |
|
|
3 |
DPF Inlet Pressure Sensor (Exhaust Gas Pressure Before Particulate Filter) |
|
|
4 |
DPF Outlet Pressure Sensor (Exhaust Gas Pressure After Particulate Filter) |
|
|
5 |
DOC Outlet Temperature Sensor (Exhaust Gas Temp in Front of Particulate Trap) |
|
|
6 |
DOC Inlet Temperature Sensor |
|
|
7 |
DPF Outlet Temperature Sensor( Exhaust Gas Temp After Particulate Trap) |
|
|
8 |
Sensor Ground |
|
|
DPF 2–pin Connector |
||
|
9 |
DOC Inlet Temperature Sensor |
2 |
|
10 |
Sensor Ground |
1 |
| EPA07 MBE 900 DDEC VI Troubleshooting Guide - 6SE580 |
| Generated on 10-13-2008 |