LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2018 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 63 (Antilock Brake System) >> Diagnostic Information and Procedures >> DTC C0121: Valve Relay Circuit Malfunction >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the K17 Electronic Brake Control Module (EBCM).
  2. Test for less than 5 Ω between the ground circuit terminals listed below:
    • Ground circuit terminal 13 and ground.
    • Ground circuit terminal 38 and ground.
    • If greater than 5 Ω 

      Test/repair the ground circuit for an open/high resistance.

    • If less than 5 Ω 

      Replace the K17 Electronic Brake Control Module

scientia non olet · About LEMON Manuals