DTC Troubleshooting

Control System DTCs

DTC Troubleshooting: P16E3

DTC P16E3 : PGM-FI-Battery Sensor LIN Communication Error

NOTE:
* Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information How To Troubleshoot The Fuel And Emissions Systems.
* Check for loose terminals on the battery sensor (battery negative (-) terminal).

1. Problem verification:

Problem verification
-1. Turn the ignition switch to ON (II).

-2. Clear the DTC with the HDS, and wait for 10 seconds.

-3. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P16E3 indicated?
-YES- Go to step 2.
-NO- Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the alternator, the battery sensor, and the ECM/PCM.

2. DTC Check:

DTC Check
-1. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P16E2 indicated?
-YES- Go to step 3.
-NO- Go to step 6.

3. Fuse check:

Fuse check
-1. Turn the ignition switch to LOCK (0).

-2. Check the following fuse.





Is the fuse OK?
-YES- The fuse is OK. Go to step 4.
-NO- Repair a short in the +B_HORN wire between the battery sensor and the under-hood fuse/relay box and replace the No. A29 (10 A) fuse, then do the repair verification.

4. Determine possible failure area (LIN circuit shorted, others):

Determine possible failure area (LIN circuit shorted, others)
-1. Turn the ignition switch to LOCK (0).

-2. Disconnect the following connector.





-3. Check for continuity between test points 1 and 2.









Is there continuity?
-YES- Go to step 5.
-NO- Go to step 8.

5. Shorted wire check (LIN line):

Shorted wire check (LIN line)
-1. Jump the SCS line with the HDS.

-2. Continue to check for continuity between the alternator 1P connector terminal and body ground, while disconnecting these connectors, one at a time:
* Battery sensor 2P connector
* ECM/PCM connector B (49P)

Does continuity go away when one of the above connectors is disconnected?
-YES- The LIN wire is OK. Replace the part that caused an open when it was disconnected, then do the repair verification.
-NO- Repair short in the LIN wire between the battery sensor, alternator, and the ECM/PCM (B16), then do the repair verification.

6. Open wire check (+B_HORN line):

Open wire check (+B_HORN line)
-1. Disconnect the following connector.





-2. Measure the voltage between test points 1 and 2.









Is there battery voltage?
-YES- The +B_HORN wire is OK. Go to step 7.
-NO- Repair an open in the +B_HORN wire between the battery sensor and No. A29 fuse in the under-hood fuse/relay box. Also check the No. A29 fuse, then do the repair verification.

7. Open wire check (LIN line):

Open wire check (LIN line)
-1. Jump the SCS line with the HDS.

-2. Disconnect the following connector.





-3. Check for continuity between test points 1 and 2.









Is there continuity?
-YES- The LIN wire is OK. Replace the battery sensor Battery Sensor Removal and Installation, then do the repair verification.
-NO- Repair an open in the LIN wire between the battery sensor and the ECM/PCM (B16), then do the repair verification.

8. Open wire check (LIN line):

Open wire check (LIN line)
-1. Jump the SCS line with the HDS.

-2. Disconnect the following connector.





-3. Check for continuity between test points 1 and 2.









Is there continuity?
-YES- The LIN wire is OK. Update the ECM/PCM ECM/PCM Update if it does not have the latest software, or substitute a known-good ECM/PCM Service and Repair then do the repair verification.
-NO- Repair an open in the LIN wire between the battery sensor and the ECM/PCM (B16), then do the repair verification.

Repair verification:

-1. Turn the ignition switch to LOCK (0).

-2. Reconnect all connectors.

-3. Turn the ignition switch to ON (II)

-4. Reset the ECM/PCM with the HDS How To Troubleshoot The Fuel And Emissions Systems.

-5. Do the ECM/PCM idle learn procedure ECM/PCM Idle Learn Procedure.

-6. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P16E3 indicated?
-YES- Check for poor connections or loose terminals at the alternator, the battery sensor, and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM Service and Repair, then recheck. If the ECM/PCM was substituted, go to step 1.
-NO- Troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM Service and Repair. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.