DTC Troubleshooting: P16BB (116)

DTC P16BB:
 Alternator B Terminal Circuit Low Voltage
  1. Turn the ignition switch ON (II).
  1. Clear the DTC with HDS.
  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 Park or neutral) for 1 minute.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P16BB indicated?
YES -
Go to Step 7 .
NO -
Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the alternator and the under-hood fuse/relay box, and check the battery performance.
  1. Check for poor connections or loose terminals at the alternator and the under-hood fuse/relay box (+B line).
Are the connections and terminals OK?
YES -
Go to Step 8 .
NO -
Repair the connectors or terminals, then go to Step 9 .
  1. Check for an open in the wire between the alternator and the under-hood fuse/relay box at the starter subharness.
Is the harness OK?
YES -
NO -
Repair open in the wire between the alternator and the under-hood fuse/relay box, then go to Step 9 .
  1. Turn the ignition switch ON (II).
  1. Reset the ECM/PCM with the HDS.
  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 (in Park or neutral) for 1 minute.
  1. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES -
If DTC P16BB is indicated, check for poor connections or loose terminals at the alternator and the under-hood fuse/relay box, then go to Step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO -
Troubleshooting is complete.■