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Liftgate Key CYL Arm SW Failure

  1. Using scan tool, clear any diagnostic trouble codes. Using scan tool, read liftgate zone switch voltage. If LIFTGATE ZONE SWITCH voltage is about 4 volts, inspect for binding liftgate key lock. Replace liftgate key lock as necessary. If LIFTGATE ZONE SWITCH voltage is not about 4 volts, go to next step.
  2. Turn liftgate key cylinder switch to lock position and observe liftgate zone switch voltage on scan tool. Do not hold key in unlock position for more than 7 seconds or code will set. If LIFTGATE ZONE SWITCH voltage is about 4 volts, go to next step. If LIFTGATE ZONE SWITCH voltage is not about 4 volts, replace liftgate key cylinder switch.
  3. Operate liftgate key lock cylinder several times from unlock to lock position. Release key lock cylinder. With key lock cylinder in neutral position, observe scan tool voltage. If LIFTGATE ZONE SWITCH voltage is about 5 volts, system is functioning properly at this time. Fault may be intermittent. If LIFTGATE ZONE SWITCH voltage is not about 5 volts, replace liftgate key cylinder switch.
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