DTC Troubleshooting: P2176 (40)
  1. Check for continuity between ECM connector terminals C3 and C4.
Is there continuity?
YES -
Go to Step 28 .
NO -
Repair open in the wires between the throttle body and the ECM (C3, C4), then go to Step 21 .
  1. Turn the ignition switch OFF.
  1. Replace the throttle body.
  1. Reconnect all connectors and the battery.
  1. Turn the ignition switch ON (II).
  1. Reset the ECM with the HDS.
  1. Do the ECM idle learn procedure.
  1. Turn the ignition switch OFF.
  1. Turn the ignition switch ON (II), and wait for 10 seconds.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P2176 indicated?
YES -
Check for poor connections or loose terminals at the throttle body and the ECM, then clean the throttle body, and go to Step 1 .
NO -
Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.■
  1. Reconnect all connectors.
  1. Update the ECM if it does not have the latest software, or substitute a known-good ECM.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P2176 indicated?
YES -
Check for poor connections or loose terminals at the throttle body and the ECM. If the ECM was updated, substitute a known-good ECM, then recheck. If the ECM was substituted, go to Step 1 .
NO -
If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.■