DTC Troubleshooting: P16E2 (L15B7/L15BA/L15BY)

DTC Troubleshooting: P16E2

DTC P16E2: PGM-FI-ACG LIN Communication Error

NOTE:

	Before you troubleshoot, review the general troubleshooting information.
	Check for a loose terminal on the alternator (+B terminal). If the alternator +B terminal was loose, DTC P16E2 will be stored.

DTC Description	Confirmed DTC	Pending DTC
P16E2 PGM-FI-ACG LIN Communication Error

Problem verification:

Problem verification

?1.	Turn the vehicle to the ON mode.

?2.	Clear the DTC with the HDS.

?3.	Turn the vehicle to the OFF (LOCK) mode.

?4.	Turn the vehicle to the ON mode, and wait 10 seconds.

?5.

Check for Pending or Confirmed DTCs with the HDS.

DTC Description	Confirmed DTC	Pending DTC
P16E2 PGM-FI-ACG LIN Communication Error

Is DTC P16E2 indicated?


	YES

The failure is duplicated. Go to step 2.


	NO

Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the alternator and the PCM. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot.?

DTC check:

DTC check

?1.

Check for Pending or Confirmed DTCs with the HDS.

DTC Description	Confirmed DTC	Pending DTC
P16E3 PGM-FI-Battery Sensor LIN Communication Error

Is DTC P16E3 indicated?


	YES

Go to step 3.


	NO

Go to step 7.

Determine possible failure area (LIN(BATT SENSOR)/LIN line, others):

Determine possible failure area (LIN(BATT SENSOR)/LIN line, others)

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.

Disconnect the following connector.

Alternator 1P connector

?3.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Alternator 1P connector: disconnected
Test point 1	Alternator 1P connector No. 1
Test point 2	Body ground

Is there continuity?


	YES

Go to step 4.


	NO

Go to step 5.

Shorted wire check (LIN(BATT SENSOR)/LIN line):

Shorted wire check (LIN(BATT SENSOR)/LIN line)

?1.	Jump the SCS line with the HDS, and wait more than 1 minute.

?2.

Continue to check for continuity between the alternator 1P connector terminal and body ground, while disconnecting these connectors, one at a time:

	PCM connector A (50P)
	12 volt battery sensor 2P connector

Does continuity go away when one of the above connectors is disconnected?


	YES

The LIN(BATT SENSOR)/LIN wire is OK. Replace the part that caused an open when it was disconnected.?


	NO

Repair a short in the LIN(BATT SENSOR)/LIN wire between the PCM (A10), the alternator, the 12 volt battery sensor.?

Determine possible failure area (alternator, others):

Determine possible failure area (alternator, others)

?1.	Reconnect the alternator 1P connector.

?2.

Disconnect the following connector.

12 volt battery sensor 2P connector

?3.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	12 volt battery sensor 2P connector: disconnected
Test point 1	12 volt battery sensor 2P connector No. 2
Test point 2	Body ground

Is there continuity?


	YES

Replace the alternator.?


	NO

Go to step 6.

Open wire check (LIN(BATT SENSOR)/LIN line):

Open wire check (LIN(BATT SENSOR)/LIN line)

?1.	Jump the SCS line with the HDS, and wait more than 1 minute.

?2.

Disconnect the following connectors.

Alternator 1P connector

PCM connector A (50P)

?3.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	12 volt battery sensor 2P connector: disconnected
	Alternator 1P connector: disconnected
	PCM connector A (50P): disconnected
Test point 1	Alternator 1P connector No. 1
Test point 2	PCM connector A (50P) No. 10

Is there continuity?


	YES

The LIN(BATT SENSOR)/LIN wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. If DTC P16E2 goes away and the PCM was substituted, replace the original PCM.?


	NO

Repair an open in the LIN(BATT SENSOR)/LIN wire between the PCM (A10) and the alternator.?

Open wire check (LIN(BATT SENSOR)/LIN line):

Open wire check (LIN(BATT SENSOR)/LIN line)

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.	Jump the SCS line with the HDS, and wait more than 1 minute.

?3.

Disconnect the following connectors.

Alternator 1P connector

PCM connector A (50P)

?4.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Alternator 1P connector: disconnected
	PCM connector A (50P): disconnected
Test point 1	Alternator 1P connector No. 1
Test point 2	PCM connector A (50P) No. 10

Is there continuity?


	YES

The LIN(BATT SENSOR)/LIN wire is OK. Replace the alternator.?


	NO

Repair an open in the LIN(BATT SENSOR)/LIN wire between the PCM (A10) and the alternator.?