Kussmaul 091-84-ETM64 User Manual

HIGH IDLE

MODEL # 091-84-ETM64

Applications

Chevy/GMC Vortec Gas

Pumper Trucks

Aerial Trucks

Power Take-Off (PTO) Systems

Emergency Vehicles

Service and Rescue Trucks

Hydraulic Systems

Air Compressors

Power Inverter Systems

Electronic Throttle Module

Fast Idle Speed Control for 2003 - 2006 Chevy &

GMC Vehicles with Gas and Diesel Engines

The 091-84-ETM64 Electronic Throttle Controller provides
five modes of engine rpm control for Chevy & GMC trucks, vans,
and buses equipped with automatic transmissions for the following:

Engines: Chassis:

Vortec

4.8 L V8 Gas

Vortec

5.3 L V8 Gas

6.0 L V8 Gas

Vortec

8.1 L V8 Gas

Vortec

6.6 L Diesel*

The 091-84-ETM64 system can be set up to use either the engine
data bus message for the parking brake interlock or a hardwired

input from the parking brake switch.

Five available modes of fast engine idle operation include three
preset fixed speeds, a variable speed control via an external
potentiometer, and which will automatically

Charge Protect,

increase engine speed to maintain the battery charge. Ten
LED indicators are provided to display the selected operating
mode, system status, and error conditions. A set-up jumper
option is provided that can allow the air conditioner system to
either be enabled or disabled during fast idle operation
(disabling the A/C allows for a more stable engine speed).

The 091-84-ETM64 controller module is compact, measuring only
2 x 4 inches. Wiring terminations utilize 0.25 inch Faston (blade)
terminals. The controller mounts under the dash and is
supplied with a three foot cable that plugs into the vehicle’s
OBD-II Data Link Connector. A terminal is provided to wire into
the chassis parking brake position switch.

Silverado, Sierra,
Kodiac C4500-C5500,
TopKick C4500-C5500,
Express, Savana, Avalanche,
Suburban, Tahoe, Trailblazer,
Envoy, Yukon
*6.6 L Duramax Diesel will only
work with 2003-2005 model years.

Key Features

Five modes of fast idle operation

Engine Control Module programming for
speed presets not required

No Chevy/GMC options required

Direct interface to engine controller data bus

Selectable A/C disable mode for engine
speed stability during fast idle operation

Hardwired parking brake switch interlock input

LED status and troubleshooting indicators

System Diagram

OBD-II Data

Link Connector

System

DLC

Cable

Customer

Interface

Wiring

091-84-ETM64

Electronic Throttle

Customer Provided Wiring

+12 V

Fast Idle Modes

RPM1

RPM2

RPM3

CHRG

VRPM

PKBRK

Ground

0

1

Ground

Preset RPM 1

Preset RPM 2

Preset RPM 3

Charge Protect

Variable RPM

Parking Brake
Position Switch

0) Fully Released

1) Brake Applied

Product Data Sheet

PDS-44A

091-84-ETM64 Series Electronic Throttle Modules

Specifications

Modes of Operation
A. Preset RPM Modes

Function: Increases idle to a preset rpm
Number of presets: Three
Input identification: RPM1, RPM2 & RPM3
Activation: Apply +12 V to input to select mode
Range of calibration: 680 to 2000 rpm
Calibration method: Internal potentiometers (3)

B. Charge Protect Mode

Function: Varies rpm to maintain battery charge
Input identification: CHRG
Activation: Apply +12 V to input to select mode
RPM range: 680 to 1700 rpm

C. Variable RPM Mode

Function: Varies rpm as a function of external

resistance change
Input identification: VRPM
Adjustment: 10k Ohm potentiometer between

input terminal and ground

RPM range: 680 to 2000 rpm

Power Requirements
Input Voltage: 8 to 16 volts dc (from Ignition Switch)
Input Current: 30 milliamps

Safety Interlocks
The following conditions must be met before the
091-84-ETM64 controller will initiate a fast idle mode:

1. Engine Running at idle speed

2. No vehicle speed

3. Automatic transmission in PARK

4. Service brake not depressed

5. Accelerator pedal not depressed

6. Parking brake set (hardwired input from switch, or
default to engine data bus message)

A/C Inhibit Mode
Due to an inherent speed instability in the GM engine
controller during fast idle operation the 091-84-ET64
controller disables air conditioner operation during fast idle
operation. A terminal (”ACON”) is provided that when
wired to +12 volts will override the A/C disable and allow
the A/C to operate during the fast idle mode. In this mode
the engine speed will momentarily drop every time the
A/C compressor cycles on or off.

Parking Brake Input
A terminal (”PK BRK”) is provided that allows a hardwired
connection to the parking brake switch. This can be used
if the vehicle configuration does not provide a data bus
message for the parking brake sensor status (e.g.,
Chassis with a non-GM instrument cluster). With no
connection to the PK BRK terminal the system will default
to use the data bus message for the fast idle interlock.
Or, the terminal can be wired to the parking brake switch,
which applies a ground to indicate that the parking brake
is applied.

Mechanical Drawing

4.00

3.50

ACON

BUS
GEAR
PK BRK
SR BRK
VSPEED
RPM1
RPM2
RPM3
CHRG
VRPM

VRPM

PK BRK

CHRG

RPM3

BUSS

RPM2

RPM1

+12V

GND

RPM3

RPM2

RPM1

0.1875

1.025

0.25 Inch Faston Terminals

0.50

2.05

System Data Link Connector (DLC) Cable

Connection to 091-84-ETM64 Module

Preset speed calibration
potentiometers (3 places)

All dimensions in inches. Not to scale.

3ft.

(Faston terminals)

OBDII
Data Link
Connector

Manufactured by InPOWER LLC

KUSSMAUL

ELECTRONICS CO., INC.

170 CHERRY AVENUE WEST SAYVILLE, NY 11796-1221, TEL: [phone], FAX: [phone],
TOLLFREE 800-346-0857, WORLD WIDE WEB: http//www.kussmaul.com E-MAIL: [e-mail]