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Home >> Isuzu >> 2008 >> i-290 Standard >> Repair and Diagnosis >> Accessories & Equipment >> Entertainment Systems >> Cellular System, Entertainment System, And Navigation System >> Diagnostic Information and Procedures >> Radio Poor Reception >> Circuit/System Testing

Circuit/System Testing

  1. Inspect the radio antenna grounding surfaces and the mounting hardware for any corrosion that may cause a poor ground.
    • If corrosion is noted, clean the grounding surfaces or hardware.
  2. Disconnect the antenna coax from the radio and the radio antenna.
  3. Test for infinite resistance between the antenna coax center terminal and ground.
    • If less than the specified value, replace the antenna coax.
  4. Test for less than 5 ohms of resistance on the antenna coax center terminal from end to end.
    • If greater than the specified range, replace the antenna coax.
  5. Test for less than 5 ohms of resistance on the antenna coax outer shield from end to end.
    • If greater than the specified range, replace the antenna coax.
  6. Test for infinite resistance between the coax center terminal and the outer shield.
    • If less than the specified value, replace the antenna coax.
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