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 | - | Replace the alternator, then go to Step 9 .
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. Do the ECM/PCM 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 (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.■