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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Controls And Fuel - 1.8L (LUW, LWE) - DTC P0010 To DTC P0442) >> Diagnostic Information and Procedures >> DTC P0412, P041F or P044F: Secondary Air Injection Valve Control Circuit >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition OFF, disconnect the KR26 Secondary Air Injection Solenoid Valve Relay. Ignition ON.
  2. Verify a test lamp illuminates between the relay coil ignition circuit terminal 86 and ground.
    • If the test lamp does not illuminate and the circuit fuse is good 
    1. Ignition OFF.
    2. Test for less than 2 Ω in the ignition circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.
    • If the test lamp does not illuminate and the circuit fuse is open 
    1. Ignition OFF.
    2. Test for infinite resistance between the ignition circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, test or replace the KR26 Secondary Air Injection Solenoid Valve Relay
      • If the test lamp illuminates 
  3. Connect a DMM, set on the diode setting, between the control circuit terminal 85 and ground.
  4. Verify the DMM reading is greater than 2.5 V or displays O.L. when commanding the Secondary Air Injection Solenoid Valve Closed with a scan tool.
    • If 2.5 V or less 
    1. Ignition OFF, disconnect the harness connector at the K20 Engine Control Module
    2. Test for less than 1 V between the control circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V
    3. Ignition OFF.
    4. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, test or replace the K20 Engine Control Module
    • If greater than 2.5 V or displays O.L. 
  5. Verify the DMM reading is less than 1 V when commanding the Secondary Air Injection Solenoid Valve Open with a scan tool.
    • If 1 V or greater 
    1. Ignition OFF, disconnect the harness connector at the K20 Engine Control Module.
    2. Test for less than 2 Ω in the control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K20 Engine Control Module.
    • If less than 1 V 
  6. Test or replace the KR26 Secondary Air Injection Solenoid Valve Relay.
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