MUT Commands

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MUT commands control a variety of solenoids, pumps, and other functions commanded by the ECU. These command IDs range from C0 through FF; IDs less than C0 are MUT Requests, which correspond to locations in the MUT table.

ID1 Description
C0
C1
C2
C3 SAS (Speed Adjusting Screw)

for adjusting the amount of air allowed to bypass the throttle body when the ISC is not in use and the throttle plate is closed

C4
C5 Purge solenoid venting
C6
C7
C8
C9
CA Invalid command
CB Invalid command
CC
CD A/C fan high
CE A/C fan low
CF Main fan high
D0 Main fan low
D1
D2 Lower RPM
D3 Boost control solenoid
D4
D5 EGR solenoid
D6 Fuel pressure solenoid
D7 Purge solenoid
D8 Fuel pump
D9 Fix timing at 5 degrees
DA Disable injector 1
DB Disable injector 2
DC Disable injector 3
DD Disable injector 4
DE Disable injector 5 (unused)
DF Disable injector 6 (unused)
E0
E1
E2
E3
E4
E5
E6
E7
E8
E9
EA
EB
EC Calibration ID (Digits 7,8)
ED Calibration ID (Digits 5,6)
EE Calibration ID (Digits 3,4)
EF Calibration ID Identifier
F0
F1
F2
F3 Cancel previously-active command (ie. SAS mode)
F4
F5
F6
F7
F8
F9 some keep alive function to keep the accuator engaged. response is 0xff
FA Clear active and stored faults
FB Force tests to run
FC Clear active faults
FD
FE Immobilizer
FF Init code