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EHC Service Information

Diagnosis / Coding

  • The EHC control module is connected to the diagnostic link. The EHC control module activates the fault display in the instrument cluster to alert the operator of the off-line sta- tus of the system. The EHC control module stores up to three electrical/electronic faults.

  • Diagnosis/troubleshooting of EHC is carried out using the fault symptom troubleshoot- ing program of the MoDiC or DIS. The EHC system has an extensive diagnosis program.

  • Replacement control modules are shipped in the factory mode. The control modules

must be ZCS encoded using the DIS or MoDiC to activate the operating parameters.

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