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DTC C0362: 4L Discrete Output Circuit High: Testing

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1998 GMC Yukon, 1998 GMC Suburban, 1998 GMC Pickup, 1998 GMC Cab & Chassis, and 1998 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
  1. If ATC system check was performed, go to next step. If system check was not performed, see ATC SYSTEM CHECK  .
  2. Turn ignition off. Connect scan tool to DLC. Set parking brake. Start engine and run at idle. Place transfer case in 2H mode. Using scan tool, record all freeze frame and failure records. Turn ignition off. Disconnect ATC control module connectors C1 and C2. Turn ignition to run position (engine off). Using a DVOM, measure voltage between ground and Gray/Black wire terminal at connector C1. If voltage is 11-13.5 volts, go to next step. If voltage is not 11-13.5 volts, go to step 4).
  3. Replace ATC control module. See REMOVAL & INSTALLATION  . When replacement is complete, go to step 6).
  4. Turn ignition off. Disconnect VCM/PCM connectors. Turn ignition to run position (engine off). Using a DVOM, measure voltage between ground and Gray/Black wire terminal at ATC control module connector C1. If voltage is 11-13.5 volts, go to next step. If voltage is not 11-13.5 volts, go to step 6).
  5. Locate and repair short to voltage in Gray/Black wire circuit. When repair is complete, go to step 8).
  6. Turn ignition off. Reconnect VCM/PCM connectors. Turn ignition to run position (engine off). Connect test light between ground and Gray/Black wire terminal at ATC control module connector C1. If test light is on, go to next step. If test light is off, go to step 8).
  7. Replace VCM/PCM. When replacement is complete, go to next step.
  8. Turn ignition off. Reconnect all disconnected components. Set parking brake. Start engine and run at idle. Shift transmission to "N" position. Shift transfer case through all modes, allowing time between each shift for transfer case to respond. Using scan tool, select "Specific DTC" and enter DTC C0362. If test runs and passes, system is functioning properly. If test does not pass, repeat test from step 1).
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