AutoTrac Service Codes (SSU)- If Equipped
Symptom Problem Solution

CODE SSU 001

Control Unit Fault

See your John Deere Dealer.

CODE SSU 002

Control unit fault.

See your John Deere Dealer.

CODE SSU 004

Vehicle mismatch.

See your John Deere Dealer.

CODE SSU 005

Front axle mismatch.

See your John Deere Dealer.

CODE SSU 008

Activation code invalid.

See your John Deere Dealer.

CODE SSU 020

SSU not calibrated.

See your John Deere Dealer.

CODE SSU 021

Steering valve supply voltage low.

See your John Deere Dealer.

CODE SSU 030

SSU supply voltage fault.

See your John Deere Dealer.

CODE SSU 031

Sensor supply voltage low.

See your John Deere Dealer.

CODE SSU 041

Steering wheel position sensor 1 supply voltage fault.

See your John Deere Dealer.

CODE SSU 042

Steering wheel position sensor 1 current fault.

See your John Deere Dealer.

CODE SSU 043

Steering wheel position sensor 1 signal fault.

See your John Deere Dealer.

CODE SSU 045

Steering wheel position sensor 1 signal Mismatch.

See your John Deere Dealer.

CODE SSU 051

Steering wheel position sensor 2 supply voltage fault

See your John Deere Dealer.

CODE SSU 052

Steering wheel position sensor 2 current fault

See your John Deere Dealer.

CODE SSU 053

Steering wheel position sensor 2 signal fault

See your John Deere Dealer.

CODE SSU 055

Steering wheel position sensor 2 signal mismatch.

See your John Deere Dealer.

CODE SSU 100

Operator presence switch circuit fault.

See your John Deere Dealer.

RX15494,00000CBCONV2 -19-26OCT01-1/2

Symptom Problem Solution

CODE SSU 101

Operator presence switch circuit fault.

See your John Deere Dealer.

CODE SSU 111

Steering valve fault.

See your John Deere Dealer.

CODE SSU 156

Flow meter sensor circuit fault.

See your John Deere Dealer.

CODE SSU 158

Flow meter low or no motion.

See your John Deere Dealer.

CODE SSU 159

Flow meter direction change.

See your John Deere Dealer.

CODE SSU 182

Steering system fault

See your John Deere Dealer.

CODE SSU 196

Steering valve deadband calibration fault.

See your John Deere Dealer.

CODE SSU 197

Steering valve command low.

See your John Deere Dealer.

CODE SSU 198

Steering valve command high.

See your John Deere Dealer.

CODE SSU 201

Wheel speed signal missing.

See your John Deere Dealer.

CODE SSU 203

Transmission signal missing.

See your John Deere Dealer.

CODE SSU 205

Hydraulic oil temperature signal missing.

See your John Deere Dealer.

CODE SSU 206

Hydraulic oil temperature signal missing.

See your John Deere Dealer.

CODE SSU 208

GREENSTAR display message fault with AutoTrac active or enabled.

See your John Deere Dealer.

RX15494,00000CBCONV2 -19-26OCT01-2/2