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Home >> GMC >> 2022 >> Hummer EV >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Hybrid/EV Energy Storage - Diagnostic Information And Procedures (2 Of 2) >> Diagnostic Information and Procedures >> DTC U3687-U3689 >> Diagnostic Aids

Diagnostic Aids

Rail Over-Voltage Exposure Time

High Voltage Component Battery Energy Control Module scan tool parameters Maximum Lifetime Over-Voltage Exposure Time Limit
K107A Drive Motor 1 Control Module
  • Drive Motor Control Module - Positive Rail Over-voltage Exposure
  • Drive Motor Control Module - Negative Rail Over-voltage Exposure
7200 Seconds
K107B Drive Motor 2 Control Module
  • Drive Motor Control Module 2 - Positive Rail Over-voltage Exposure
  • Drive Motor Control Module 2 - Negative Rail Over-voltage Exposure
7200 Seconds
K107C Drive Motor Control Module 3
  • Drive Motor Control Module 3 - Positive Rail Over-voltage Exposure
  • Drive Motor Control Module 3 - Negative Rail Over-voltage Exposure
7200 Seconds
E54V Hybrid/Electric Vehicle Coolant Heater
  • Hybrid/Electric Vehicle Coolant Heater - Positive Rail Over-voltage Exposure
  • Hybrid/Electric Vehicle Coolant Heater - Negative Rail Over-voltage Exposure
600 Seconds
G1HV Air Conditioning With Motor Compressor
  • Air Conditioning Electric Compressor - Positive Rail Over-voltage Exposure
  • Air Conditioning Electric Compressor - Negative Rail Over-voltage Exposure
7200 Seconds
T18 Battery Charger
(Includes 14V Power Module)
  • Battery Charger Control Module - Positive Rail Over-voltage Exposure
  • Battery Charger Control Module - Negative Rail Over-voltage Exposure
  • 14 Volt Power Module - Positive Rail Over-voltage Exposure
  • 14 Volt Power Module - Negative Rail Over-voltage Exposure
7200 Seconds