New Holland 3672 – ECU: EGR Short to Ground on EGR Out2 pin A35 error for H-bridge

The Engine Control Module (ECM) has detected a short to ground in the electrical circuit for the Exhaust Gas Recirculation (EGR) valve. Specifically, the fault is located on the 'EGR Out2' circuit at pin A35 of the H-bridge connector. The H-bridge circuit controls the position of the EGR valve, and this short circuit condition interrupts the proper operation of the EGR system.

• L225
• L230
• L321
• L328
• C227
• C232
• C238
• C327
• C332
• C337
• TR270
• TR270B
• TR310
• TR310B
• TR320
• TV370
• TV370B
• TV380
• W50C
• W60C
• W70C
• W80C
• SR210B
• SR220
• SR240B
• SR250
• SV250
• SV280B
• SV300

1. 1

   Use a diagnostic scanner to check for any other active or stored fault codes that might provide additional clues.

2. 2

   Consult the F5C and F5A engine service manuals to locate the EGR valve, ECU, and relevant connectors.

3. 3

   Visually inspect the wiring harness between the ECU and the EGR valve for chafing, melting, or corrosion, paying close attention to the engine's 60-pin connector.

4. 4

   Disconnect the EGR valve connector and use a multimeter to test for a short to ground on the wire leading to pin A35 of the engine connector.

5. 5

   Check the resistance of the EGR valve's internal circuits against OEM specifications to determine if the short is internal to the valve.

1. 1

   Disconnect battery

   Disconnect the battery before starting any electrical repairs to ensure safety.

2. 2

   Repair wiring harness

   If the diagnostic checks revealed a damaged wiring harness or a short on the wire to pin A35, repair or replace the affected section. Ensure all connections are clean and secure.

3. 3

   Replace EGR valve

   If the EGR valve has an internal short, drain the engine coolant (if applicable). Carefully remove the old valve, taking note of the orientation of any gaskets or seals. Install the new assembly using new gaskets, and torque mounting bolts to OEM specifications.

4. 4

   Re-evaluate system

   Reconnect the EGR valve and battery, refill coolant, and clear fault codes. Start the engine and monitor EGR live data with a diagnostic tool to confirm the repair.