2
7
F. Wiring Diagram
GM CHASSIS
0) Fully Released
1) Brake Applied
Ground
Customer
Wiring
Parking Brake
Position Switch
Chassis Ground
(Battery Neg.)
Fast Idle Switch
+12 V Ignition
(Fused)
OBD-II
Diagnostic
Connector
0
1
Off
Ground
On
RPM 3
RPM 2
+12 Volts
RPM 1
Optional Park Brake
Wiring:
Ground satisfies
the parking brake set
interlock.
Green - Pin 14
Yellow - Pin 6
DLC Cable
(Supplied with
ETM67A/68A)
Shield - Pin 5
G
N
D
+
1
2
V
C
A
N
L
P
K
B
R
K
R
P
M
2
R
P
M
1
R
P
M
1
R
P
M
2
R
P
M
3
C
A
N
H
R
P
M
3
P
T
O
InPower
ETM67A/68A
Yellow
CANH
(Yellow)
View looking into connector:
8
16
7
15
6
14
5
13
12
4
3
1
1
10
2
1
9
PTO output is +12 volts at 3 amps and is set
when the throttle control is actively controlling
the engine rpm and the Chassis Ready
Conditions are satisfied. Do not connect any
+12 volt sources to this output terminal or
damage may result voiding the warranty.
Green
Shield
CANL
(Green)
C
H
R
G
Charge Protect
(Only on ETM67)
B. Vehicle Applications
The ETM67A and ETM68A support the following GM vehicle
configurations.
Model Year
Chassis
Engine
Transmission
2006, 2007,
Silverado/Sierra Classic 6.6 L Diesel
Automatic
2007i, 2008,
C2500, C3500
2009, 2010
2007i, 2008,
Silverado/Sierra Classic 6.0 L Gas
Automatic
2009
C2500, C3500
2006, 2007,
Kodiac/Topkick C4500, 6.6 L Diesel
Automatic
2007i, 2008,
C5500
2009
2006 - 2010
Express, Savanna
6.6 L Diesel,
Automatic
4.8 L & 6.0 L Gas
2007 - 2010
Tahoe/Suburban/Yukon 4.8 L , 5.3 L, 6.0 L,
Automatic
& 6.2 L Gas
C. Operation
When the vehicle is parked and Chassis Ready Conditions are satisfied,
the engine speed may be controlled by one of the three available preset
speed modes. The preset speed is adjusted by three calibration
potentiometers on the top of the ETM module.
Chassis Ready Conditions:
1. Parking brake is set.
2. Gear shift in “Park”
3. Foot is off the service brake
4. Foot is off the accelerator pedal
5. Vehicle is stationary (no speed)
6. Engine is started and idling below 1000 RPM
Modes Of Operation:
1. Three Preset RPM High Idle Modes:
Function: Increase idle to a preset rpm value
Terminals: RPM1, RPM2, RPM3
Activation: Apply +12 V to terminal
Range of Calibration: 650 to 1460 rpm (Diesel), 650-2000 rpm
(Gas)
Type of Adjustment: Internal potentiometers
OM-64G ETM67A & ETM068A