TM 10-3930-675-20-10015 00-1ELECTRONIC CONTROL UNIT (ECU) SUPPLY VOLTAGE TROUBLESHOOTING0015 00THIS WORK PACKAGE COVERSError Code 451 - Voltage Supply Too High for SteeringECU (792)Error Code 452 - Voltage Supply Too Low for SteeringECU (792)Error Code 811 - Voltage Supply Too Low for Transmis-sion ECU (793)Error Code 812 - Voltage Supply Too High for Trans-mission ECU (793)Error Code 813 - Voltage Failure at Transmission Gear-shift Valve SupplyError Code 814 - Voltage Failure at Transmission Gear-shift Valve SupplyINITIAL SETUPReferencesTM 10-3930-675-10Current Supply (A34738.0200) (WP 0199 00-31)References - ContinuedECS Steering (A34651.0200) (WP 0199 00-16)ECU Transmission (A34650.0200) (WP 0199 00-12)NOTERefer to WP 0004 00 for additional troubleshooting guidance, information, and illustrations that locate criti-cal components.Table 1. Error Code 451 - Voltage Supply Too High for Steering ECU (792) Troubleshooting Procedures.MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTIONError Code 451 - Voltage Supply Too High forSteering ECU (792)Check output voltage fromalternator.If output voltage is greater than33V, replace alternator (WP0069 00).
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