FixVault
Home › Subaru › 1996 › SVX LSi › Repair and Diagnosis › Engine Performance › System › Engine Controls - Tests W/Codes › Diagnostic Trouble Codes › Code 24 - By-Pass Air Control Solenoid Valve

Code 24 - By-Pass Air Control Solenoid Valve

NOTE: For ECM harness connector terminal identification, see Figure.
  1. Turn ignition on. Using a DVOM, check voltage between ECM harness connector terminal D14 (backprobe) and ground. Voltage should be 10 volts or greater. If voltage is as specified, go to step 4). If voltage is not as specified, go to next step.
  2. Turn ignition off. Disconnect ECM and main relay harness connectors. Using an ohmmeter, check resistance between ECM harness connector terminal D14 and main relay harness connector terminal No. 1 (Black/White wire). Resistance should be zero ohms. If resistance is as specified, go to next step. If resistance is not as specified, repair circuit as necessary.
  3. Turn ignition on. Using a DVOM, check voltage between ground and main relay harness connector terminals No. 1 (Black/White wire) and No. 2 (Brown/Black wire). Voltage should be 10 volts or greater at each terminal. If voltage is not as specified, repair appropriate circuit as necessary. If voltage is as specified, replace main relay.
  4. Turn ignition on. Using a DVOM, check voltage between ground and ECM harness connector terminals D1 and D2. Voltage should be 6 volts or greater at terminal D1, and 7 volts or greater at terminal D2. If voltage is not as specified, go to next step. If voltage is as specified, check ECM harness connector terminals for good contact. Repair as necessary. If harness connector terminals are okay, replace ECM.
  5. Turn ignition off. Remove throttle body from collector. Disconnect by-pass air control solenoid valve harness connector. Using an ohmmeter, check resistance between ECM harness connector terminal D1 and solenoid valve harness connector terminal No. 3 (White wire), and between ECM harness connector terminal D2 and solenoid valve harness connector terminal No. 1 (Black wire). Resistance should be zero ohms for both circuits. If resistance is not as specified, repair appropriate circuit as necessary. If resistance is as specified, replace solenoid valve.
About FixVault