2000 - 2999: 2351

2351-ECM VOLTAGE TOO HIGH

For a complete wiring diagram Refer to the Wiring Information Electrical Diagrams

- When Monitored:
With the ignition on or the engine running.

- Set Condition:
The ECM detects battery voltage of 15.5 volts or greater for 3.0 seconds





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.Pre-Diagnostic Troubleshooting Procedure

1. CHECK FOR ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, erase ECM DTCs.

NOTE: This DTC may be caused by a charging system problem. Refer to the Service Information and verify proper charging system operation before continuing.

3. Test drive the vehicle.
4. Turn the ignition on.
5. With the scan tool, read ECM DTCs.

Did this DTC set again?

Yes

- Go To 2

No

- Go To 3

2. CHECK POWER AND GROUNDS
1. Perform the Checking the ECM Power and Ground test.Checking the ECM Power and Ground Circuits

Were any problem found with the ECM powers and grounds?

Yes

- Repair as necessary.
- Perform the ECM Verification Test.Verification Tests

No

- Replace and program the Engine Control Module.
- Perform the ECM Verification Test.Verification Tests

3. INTERMITTENT CONDITION

WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing.

NOTE: The conditions that set the DTC are not present at this time. The following list may help in identifying the intermittent condition.

1. With the engine running at normal operating temperature, monitor the scan tool parameters related to the DTC while wiggling the wiring harness. Look for parameter values to change and/or a DTC to set.
2. Review the DTC When Monitored and Set Conditions. If possible, try to duplicate the conditions under which the DTC was set.
3. Search for any Technical Service Bulletins (TSB) that may apply.
4. Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires.
5. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.

Were any of the above conditions present?

Yes

- Repair as necessary.
- Perform the ECM Verification Test.Verification Tests

No

- Test Complete.