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INPUTS AND OUTPUTS
4.3.20
TOP2 SHIFT LOCKOUT SOLENOID
The shift lockout solenoid is used to disable the driver splitter position switch in an Eaton Top2
transmission. When the digital output is switched to power, the splitter position control is taken
away from the driver and controlled by the ECU. The correct transmission type must be selected.
For additional information on Top2, refer to section 5.26, "Transmission Interface."
Installation
This circuit is a high-side digital output. The Top2 Shift lockout solenoid is wired to pin 3/7 of
the CPC.
Programming Requirements and Flexibility
The options for this digital output are listed in Table 4-44.
Parameter
Group
Parameter
Setting
Options
Default
Access
35
3 07 DO
Selection
3 — Top2 Lockout
Solenoid
0 — Disable
1 — Decompression Valve*
2 — Grid Heater*
3 — Top2 Lockout Solenoid
4 — Modulation Output for
Allison Transmission without
J1939 Interface (Gear1)*
5 — PTO Valve for AGS2
0 — Disable
VEPS or
DRS
35
3 07 DO Fault
Detection
—
0 — Disabled
1 — Enabled
0 — Disable
VEPS or
DRS
* Not supported in NAFTA
Table 4-44
Top2 Shift Lockout Solenoid Programming Options
Diagnostics
A Diagnostic Trouble Code (DTC) will be logged for an open or shorted circuit.
4-46
All information subject to change without notice.
(Rev. 01/07)
7SA827 0701
Copyright © 2007 DETROIT DIESEL CORPORATION