DTC Troubleshooting: P16BC
  1. Check for continuity between alternator 4P connector terminal No. 4 and ECM connector terminal B47.
Is there continuity?
YES -
Go to Step 27 .
NO -
Repair open in the wire between the ECM (B47) and the alternator, then go to Step 18 .
  1. Turn the ignition switch to LOCK (0).
  1. Reconnect all connectors.
  1. Turn the ignition switch to ON (II).
  1. Reset the ECM with the HDS.
  1. Do the ECM idle learn procedure.
  1. Start the engine.
  1. Check under these conditions:
    • A/C on
    • Temperature control at maximum cool
    • Blower fan at maximum speed
    • Rear window defogger on
    • Headlights on high beam
  1. Hold the engine speed at 2,000 rpm (min −1 ) (in neutral) for 1 minute.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P16BC indicated?
YES -
Check for poor connections or loose terminals at the alternator and the ECM, then 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. Start the engine.
  1. Check under these conditions:
    • A/C on
    • Temperature control at maximum cool
    • Blower fan at maximum speed
    • Rear window defogger on
    • Headlights on high beam
  1. Hold the engine speed 2,000 rpm (min −1 ) (in neutral) for 1 minute.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P16BC indicated?
YES -
Check for poor connections or loose terminals at the alternator and the ECM. If the ECM was updated, substitute a known-good ECM, then go to Step 29 . 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.■