DTC P16E5 (19-21 9-Speed A/T)
DTC P16E5 : LIN Communication Error (Powertrain Control Module (PCM)-DC-DC Converter)
NOTE: Before you troubleshoot, review the general troubleshooting information - Refer to: How to Troubleshoot the Fuel and Emissions Systems .
| DTC Description | Confirmed DTC | Pending DTC |
|---|---|---|
| P16E5 LIN Communication Error (Powertrain Control Module (PCM)-DC-DC Converter) |
DTC (PGM-FI)
- 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 P16E5 LIN Communication Error (Powertrain Control Module (PCM)-DC-DC Converter) Is DTC P16E5 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 DC-DC converter 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 - Refer to: How to Troubleshoot the Fuel and Emissions Systems .
- DTC check
- 1. 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
Go to step 3.
NO
Go to step 7.
- Determine possible failure area (LIN/LIN (ACG) line shorted, others)
- 1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the following connector.
DC-DC converter connector A (3P) - 3. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode DC-DC converter connector A (3P): disconnected Test point 1 DC-DC converter connector A (3P) (female terminals) No. 1: Test point 2 Body ground Is there continuity?
YES
Go to step 4.
NO
Go to step 5.
- Shorted wire check (LIN/LIN (ACG) line)
- 1. Jump the SCS line with the HDS, and wait more than 1 minute.
- 2. Continue to check for continuity between DC-DC converter connector A (3P) terminal No. 1 and body ground, while disconnecting these connectors, one at a time:
- Alternator 1P connector
- 12 volt battery fan motor 3P connector
- PCM connector A (50P)
Does continuity go away when one of the above connectors is disconnected?
YES
The LIN/LIN (ACG) wire is OK. Replace the part that caused an open when it was disconnected.
NO
Repair a short in the LIN/LIN (ACG) wire between the PCM (A24), the alternator, and the DC-DC converter.
- Determine possible failure area (DC-DC converter, others)
- 1. Reconnect the following connector.
DC-DC converter connector A (3P) - 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 (female terminals) No. 1: Test point 2 Body ground Is there continuity?
YES
NO
Go to step 6.
- Open wire check (LIN/LIN (ACG) line)
- 1. Jump the SCS line with the HDS, and wait more than 1 minute.
- 2. Disconnect the following connectors.
PCM connector A (50P) DC-DC converter connector A (3P) - 3. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Alternator 1P connector: disconnected PCM connector A (50P): disconnected DC-DC converter connector A (3P): disconnected Test point 1 DC-DC converter connector A (3P) (female terminals) No. 1: Test point 2 PCM connector A (50P) No. 24 - Refer to:
PCM Connector for Inputs and Outputs (19-21 9-Speed A/T) .Is there continuity?
YES
The LIN/LIN (ACG) 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. - Refer to:
PCM Removal and Installation (19-21 9-Speed A/T) .
If DTC P16E5 goes away and the PCM was substituted, replace the original PCM - Refer to:
PCM Removal and Installation (19-21 9-Speed A/T) .
NO
Repair an open in the LIN/LIN (ACG) wire between the PCM (A24) and the DC-DC converter.
- Fuse check
- 1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Check the following fuse.
Fuse No. C7 - Refer to:
Fuse to Components Index (With Auto Idle Stop System) (2019 2020 2021), or
Fuse to Components Index (Without Auto Idle Stop System) (2019 2020 2021) .Is the fuse OK?
YES
Go to step 8.
NO
Repair a short in the IG1 ACG wire between the DC-DC converter and the No. C7 fuse. Also replace the No. C7 fuse.
- Open wire check (IG1 ACG line)
- 1. Disconnect the following connector.
DC-DC converter connector A (3P) - 2. Turn the vehicle to the ON mode.
- 3. Measure the voltage between test points 1 and 2.
Test condition Vehicle ON mode DC-DC converter connector A (3P): disconnected Test point 1 DC-DC converter connector A (3P) (female terminals) No. 3: Test point 2 Body ground Is there battery voltage?
YES
Go to step 9.
NO
Repair an open in the IG1 ACG wire between the DC-DC converter and the No. C7 fuse. - Refer to:
Fuse to Components Index (Without Auto Idle Stop System) (2019 2020 2021) or
Fuse to Components Index (With Auto Idle Stop System) (2019 2020 2021)
- Open wire check (LIN/LIN (ACG) 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 connector.
PCM connector A (50P) - 4. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode DC-DC converter connector A (3P): disconnected PCM connector A (50P): disconnected Test point 1 DC-DC converter connector A (3P) (female terminals) No. 1: Test point 2 PCM connector A (50P) No. 24 - Refer to:
PCM Connector for Inputs and Outputs (19-21 9-Speed A/T) .Is there continuity?
YES
The LIN/LIN (ACG) wire is OK. Replace the DC-DC converter .
NO
Repair an open in the LIN/LIN (ACG) wire between the PCM (A24) and the DC-DC converter.