5673 - Pacbrake

Pacbrake Exhaust Brake Wiring Schematic For:
CATERPILLAR 3126E C-7, C-9 Only - without VIM
4th Generation Allison Only
For vehicles:
(WITH) Allison 4th Gen 3000 transmissions without VIM (WITH or WITHOUT) ABS braking (WITH) on-board air system
Exhaust
brake
Pacbrake
On/Off switch
OFF
Connect
to pin 16
Switch return to either
Pin 3, 5 or 18 at P1J1
REAR Connector
at Engine ECU
1
13
58
70
Wire 102
Allison TCM
2
Connect
to pin 12
4
Torque
Converter
Relay
Wire 104
Single Connector
@ TCM
12 VDC ignition
power source
must be capable
of 10 amps
30
85
10 amp fuse
86
87
87a
Pacbrake solenoid
4th Generation Allison controls have the ability to be programed to communicate the downshift and torque converter
unlock features over the Data-link J1939. Doing so eliminates the need to hard wire the exhaust brake circut to the
transmission ECU, the exhaust brake circuit only needs to be hard wired with the engine ECU. Consult your closest
Caterpillar or Allison dealer for a quote, Pacbrake offers an interface kit C13074 if hard wiring is your preference.
The switch input at J1/P1:16 requires that the "Exhaust Brake Switch" be programmed to "Installed".
The parameter "Exhaust Brake Warm-up Configuration" Must be programmed to "Exhaust Brake Only" or
"Exhaust Brake & Warm Up".
Early 2002 production 3126E engines have the ability to be programmed to allow the exhaust brake to assist the engine in warming up
faster in cold weather. Program, customer parameter to "Exhaust Brake and Warm-up" and program warm-up mode IDLE speed to
1100 RPM.
NOTE:
• * View shown is looking at the harness side of the connector.
• Relays shown are de-energized.
• Information for this schematic was derived from vehicle systems at the date of this printing.
• Updates or variations by vehicle manufacturers constituting changes will not be the responsibility of Pacbrake.
Phone: 800-663-0096 • Fax: 604-882-9278 • E-mail: [email protected] • Internet: www.pacbrake.com
Pacbrake® is a registered trademark of Pacbrake Company. Other trademarks used herein are property of their respective holders. Printed in Canada
L5673.11.21.06

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