DTC P16BC: Alternator FR Terminal Circuit/IGP Circuit Low Voltage

1. Check for poor connections at the alternator 4P connector.

Are the connectors OK?

YES | - | Go to Step 2 .
NO | - | Reconnect the connector, then go to Step 18 .

1. Turn the ignition switch ON (II).

1. Clear the DTC 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 (min −1 ) (in Park or neutral) for 1 minute.

1. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P16BC indicated?

YES | - | Go to Step 8 .
NO | - | Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the alternator.■

1. Turn the ignition switch OFF.

1. Disconnect the alternator 4P connector.

1. Turn the ignition switch ON (II).

1. Measure voltage between alternator 4P connector terminal No. 1 and body ground.

Is there battery voltage?

YES | - | Go to Step 12 .
NO | - | Repair open in the wire between the alternator (IG1 line) and the No. 18 ACG (15 A) fuse in the under-dash fuse/relay box, then go to Step 18 .