OMA89851

Troubleshoot RowCommand™

Symptom

Problem

Solution

Caution: No CAN Bus communications with Electronic Power Modules (EPM). Some row clutches will not disengage.
Check Connections. A restart is required to attempt communications with EPMs.

EPM is off line and not communicating with controller.

Check all connections on EPM that is not communicating.

See your John Deere dealer.

Caution: Electronic Power Modules (EPM) are not responding to CAN Bus commands. Some row clutches will not disengage.
Check connections. A restart is required to attempt communications with EPMs.

EPM has failed to respond to CAN Bus commands.

Check all harness connections to EPM that is not responding.

EPMs not active

Switch failed EPM with known EPM that is functioning and retest.

See your John Deere dealer.

Caution: Low Supply Voltage on Electronic Power Modules (EPM). Clutch system self-test not available.

Voltage has fallen below 10.5 V on any input supply on individual EPM.

Check EPM fuse.

Check all harness connections on EPM with low voltage.

Increase engine speed to increase alternator output.

See your John Deere dealer.

Caution: Supply Voltage Out of Range on Electronic Power Modules (EPM). Clutch system self-test not available.

Voltage has dropped below 9.0 V on any input supply on individual EPM.

Check EPM fuse.

Check all harness connections to EPM that has low voltage.

Increase engine speed to increase alternator output.

See your John Deere dealer.

Clutch self-test at start up does not function.

An EPM is not communicating or voltage feed out of range, and clutch test is not available.

Check EPM fuse.

Check harness connections to non responsive EPM. See your John Deere dealer.

RowCommand™ row sections for rows 1-10 not visible on display.

EPM 1 not communicating or not active.

Inspect fuse for EPM 1 (10 amp) on EPM harness.

Determine if EPM 1 is operational. Refer to Diagnostics tab, Tests, EPM status.

Inspect harness from EPM to appropriate rows for loose connections or damage.

Exchange EPM with a functional EPM to verify harness or EPM problem.

Contact your John Deere dealer.

Supply voltage out of range.

Inspect fuse for EPM 1 (10 amp) on EPM harness.

Determine if EPM 1 is operational. Refer to Diagnostics tab, Tests, EPM status.

Inspect harness from EPM to appropriate rows for loose connections or damage.

Exchange EPM with a functional EPM to verify harness or EPM problem.

Contact your John Deere dealer.

RowCommand™ row sections for rows 11-20 not visible on display.

EPM 2 not communicating or not active.

Inspect fuse for EPM 2 (10 amp) on EPM harness.

Determine if EPM 2 is operational. Refer to Diagnostics tab, Tests, EPM status.

Inspect harness from EPM to appropriate rows for loose connections or damage.

Exchange EPM with a functional EPM to verify harness or EPM problem.

Contact your John Deere dealer.

RowCommand™ row sections for rows 21-30 not visible on display.

EPM 3 not communicating or not active.

Inspect fuse for EPM 3 (10 amp) on EPM harness.

Determine if EPM 3 is operational. Refer to Diagnostics tab, Tests, EPM status.

Inspect harness from EPM to appropriate rows for loose connections or damage.

Exchange EPM with a functional EPM to verify harness or EPM problem.

Contact your John Deere dealer.

RowCommand™ row sections for rows 31-40 not visible on display.

EPM 4 not communicating or not active.

Inspect fuse for EPM 4 (10 amp) on EPM harness.

Determine if EPM 4 is operational. Refer to Diagnostics tab, Tests, EPM status.

Inspect harness from EPM to appropriate rows for loose connections or damage.

Exchange EPM with a functional EPM to verify harness or EPM problem.

Contact your John Deere dealer.

RowCommand™ row sections for rows 41-48 not visible on display.

EPM 5 not communicating or not active.

Inspect fuse for EPM 5 (10 amp) on EPM harness.

Determine if EPM 5 is operational. Refer to Diagnostics tab, Tests, EPM status.

Inspect harness from EPM to appropriate rows for loose connections or damage.

Exchange EPM with a functional EPM to verify harness or EPM problem.

Contact your John Deere dealer.

Low voltage warning when all RowCommand™ clutches are powered (meter disengages).

Excessive electrical load.

Decrease electrical load.

Increase engine RPM to increase alternator output.

Verify that alternator output is within specifications.

NS43404,00000EE-19-20090313