Allison B 400 - Electronic Control Unit Block Diagram

WTEC II ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL
1–2 Copyright © 1998 General Motors Corp.
GENERAL DESCRIPTION
Figure 1–2. WT Electronic Control Unit Components (Units Produced 9/94–12/97)
Figure 1–3 is a block diagram of the basic system’s inputs and outputs.
Figure 1–3. Electronic Control Unit Block Diagram
7
8
9
4
5
6
1
2
3
0
E
N
T
E
R
=
x
–
+
–
OPTIONAL
DEUTSCH DDR
CONNECTOR
INTEGRAL ECU/
SHIFT SELECTORS
REMOTE
ECU
PRO-LINK
®
DIAGNOSTIC TOOL
J 38538-A
THROTTLE
POSITION
SENSOR
MD/B 300/B 400
RETARDER CONNECTOR
(INCLUDES OUTPUT
SPEED SENSOR)
MD 3070
TRANSFER CASE
CONNECTOR
OUTPUT SPEED
SENSOR
*CONNECTOR
TRANSMISSION
CONNECTOR
ENGINE
SPEED
SENSOR
CONNECTOR
V01587
TPS
CONNECTOR
TURBINE
SPEED
SENSOR
CONNECTOR
(HD/B 500)
HD/B 500
RETARDER
TEMPERATURE
SENSOR
CONNECTOR
REMOTE SERIAL
INTERFACE
CONNECTOR
RETARDER “K”
CONNECTOR
(HD/B 500)
HD/MD/B RETARDER
ACCUMULATOR “H”
SOLENOID
CONNECTOR
OPTIONAL
BULKHEAD
CONNECTOR
WIRING
HARNESS
NOTE: Illustration is not to scale.
*All HD/B 500 models
All Non-Retarder MD/B 300/B 400 models
12DNR
D
N
R
ELECTRONIC
CONTROL
UNIT
(ECU)
CONNECTORS
DIAGNOSTIC
DATA READER (DDR)
CONNECTOR
VEHICLE
INTERFACE
MODULE
(VIM)
VEHICLE
INTERFACE
WIRING
(VIW)
CONNECTOR
RETARDER
MODULATION
REQUEST (RMR)
SENSOR CONNECTOR
REMOTE
PUSHBUTTON SHIFT
SELECTOR
STRIP PUSHBUTTON
SHIFT SELECTOR
REMOTE
LEVER SHIFT
SELECTOR
SHIFT SELECTOR
RANGE AND
MODE SWITCH
TONE/DISPLAY
VIM
INPUTS OUTPUTS
ECU
SPEED SENSORS
THROTTLE POSITION SENSOR
RETARDER MODULATION
V01812
TEMPERATURE SENSOR
(SUMP/RETARDER)
SOLENOIDS
OIL LEVEL SENSOR
C3 PRESSURE SWITCH