John Deere 2797.05 – Engine Control Unit (ECU): Injector High Voltage Supply #1 Circuit Has High Resistance / Injection Valve Supply Voltage 1, Resistance Too High

The Engine Control Unit (ECU) has detected abnormally high electrical resistance in the supply circuit providing high voltage to the fuel injectors. This condition is typically caused by an open circuit, a corroded connection, or a damaged wire in the injector harness, which can impair the proper operation of the fuel injection system and negatively affect engine performance.

• 5085E
• 5090E
• 5090EL
• 5100E
• 5085M
• 5100M
• 5100MH
• 5100ML
• 5115ML
• 5090M
• 5115M
• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 9470RT
• 9520RT
• 9570RT
• 8245R to 8400R
• 8310RT
• 8335RT
• 8360RT
• 7210R
• 7230R
• 7250R
• 7270R
• 7290R
• 7310R
• 6090MC
• 6090RC
• 6100MC
• 6100RC
• 6110MC
• 6110RC
• 6100D
• 6110D
• 6115D
• 6125D
• 6130D
• 6140D

1. 1

   Inspect all wiring and connections leading to the #1 injection valve for breaks, disconnections, or frayed wires that could result in an open circuit.

2. 2

   Use a multimeter to verify the resistance levels in the circuit and compare the readings against normal specified values to pinpoint the exact area of high resistance.

1. 1

   Repair or Replace Damaged Components

   Based on the multimeter readings, repair any breaks in the wiring harness or replace damaged connectors. If the wiring is intact but the internal resistance of the injector is out of specification, the injection valve itself must be replaced.

2. 2

   Reset the ECU

   After the physical repairs are completed, reset the Engine Control Unit to clear the stored 002797.05 fault code.

3. 3

   Conduct Functional Tests

   Perform a full system test and run the engine to confirm that the repair has resolved the issue and that fuel delivery is operating within normal parameters.