REPAIR VERIFICATION
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1. Turn the ignition switch to ON (II).
2. Reset the PCM with the HDS See HOW TO TROUBLESHOOT THE A/T SYSTEM or HOW
TO TROUBLESHOOT THE FUEL AND EMISSIONS SYSTEMS .
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3. DO THE PCM IDLE LEARN PROCEDURE .
4. Start the engine.
5. Check under these conditions:
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A/C on
Temperature control at maximum cool
Blower fan at maximum speed
Headlights on high beam
Rear window defogger on
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Hold the engine speed at 2, 000 rpm (in P or N) for 1 minute.
Check for Pending or Confirmed DTCs with the HDS.
Confirmed
DTC
Pending
DTC
Freeze
Frame
DTC Description
P16BB ALTERNATOR B TERMINAL CIRCUIT LOW
VOLTAGE
Is DTC P16BB indicated?
YES : Check for poor connections or loose terminals at the alternator and the under-hood fuse/relay box, then
go to step 1.
NO : Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated
DTC's troubleshooting.
DTC P16E2: PGM-FI-ACG LIN COMMUNICATION ERROR
Fig. 328: DTC Troubleshooting Flow Chart (P16E2)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
NOTE:
Before you troubleshoot, record all freeze data and any on-board snapshot, and
review the general troubleshooting information See HOW TO TROUBLESHOOT
THE A/T SYSTEM or HOW TO TROUBLESHOOT THE FUEL AND EMISSIONS
SYSTEMS .
Confirmed
DTC
Pending
DTC
Freeze
Frame
DTC Description
P16E2 PGM-FI-ACG LIN COMMUNICATION
ERROR
1. Problem verification:
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1. Turn the ignition switch to ON (II).
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2. Clear the DTC with the HDS See HOW TO TROUBLESHOOT THE A/T SYSTEM or
HOW TO TROUBLESHOOT THE FUEL AND EMISSIONS SYSTEMS , and wait for 10
seconds.
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3. Check for Pending or Confirmed DTCs with the HDS.
Confirmed
DTC
Pending
DTC
Freeze
Frame
DTC Description
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, the battery sensor, and the PCM.
2. DTC Check:
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1. Check for Pending or Confirmed DTCs with the HDS.
Confirmed
DTC
Pending
DTC
Freeze
Frame
DTC Description
P16E3 PGM-FI-BATTERY SENSOR LIN
COMMUNICATION ERROR
Is DTC P16E3 indicated?
YES : Go to step 3.
NO : Go to step 7.
3. Determine possible failure area (LIN(BATT SENSOR)/LIN circuit shorted, others):
1. Turn the ignition switch to LOCK (0).
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2. Disconnect the following connector.
Alternator 1P connector
3. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
Alternator 1P connector: disconnected
Test circuit LIN
Test point 1 Alternator 1P connector No. 1 (TAN)
Test point 2 Body ground
Fig. 329: Checking Continuity Between Alternator 1P Connector No. 1 (TAN) And Body
Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES : Go to step 4.
NO : Go to step 5.
4. Shorted wire check (LIN(BATT SENSOR)/LIN line):
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1. Jump the SCS line with the HDS.
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2. Continue to check for continuity between the alternator 1P connector terminal and body ground,
while disconnecting these connectors, one at a time:
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Battery sensor 2P connector
PCM connector B (49P)
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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, then do the repair verification .
NO : Repair a short in the LIN(BATT SENSOR)/LIN wire between the battery sensor, the alternator, and
the PCM (B16), then do the repair verification .
5. Determine possible failure area (alternator, others):
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1. Turn the ignition switch to LOCK (0).
2. Reconnect the alternator 1P connector
3. Disconnect the following connector.
Battery sensor 2P connector
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4. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
Battery sensor 2P connector: disconnected
Test circuit LIN(BATT SENSOR)
Test point 1 Battery sensor 2P connector No. 2 (BLU)
Test point 2 Body ground
Fig. 330: Checking Continuity Between Battery Sensor 2P Connector No. 2 (BLU) And Body
Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES : Replace the alternator See ALTERNATOR OVERHAUL or ALTERNATOR REMOVAL
AND INSTALLATION , then do the repair verification .
NO : Go to step 6.
6. Open wire check (LIN line):
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1. Jump the SCS line with the HDS.
2. Disconnect the following connector.
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Alternator 1P connector
PCM connector B (49P)
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3. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
Battery sensor 2P connector: disconnected
Alternator 1P connector: disconnected
PCM connector B (49P): disconnected
Test circuit LIN
Test point 1 PCM connector B (49P) No. 16 (TAN)
Test point 2 Alternator 1P connector No. 1 (TAN)
Fig. 331: Checking Continuity Between PCM Connector B (49P) No. 16 (TAN) And
Alternator 1P Connector No. 1 (TAN)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES : The LIN wire is OK. Update the PCM See PCM UPDATE or PCM REMOVAL AND
INSTALLATION if it does not have the latest software, or substitute a known-good PCM See PCM
REMOVAL AND INSTALLATION or PCM UPDATE , then do the repair verification .
NO : Repair an open in the LIN wire between the alternator and the PCM (B16), then do the repair
verification .
7. Open wire check (LIN line):
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1. Jump the SCS line with the HDS.
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2. Disconnect the following connectors.
Alternator 1P connector
PCM connector B (49P)
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3. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
Alternator 1P connector: disconnected
PCM connector B (49P): disconnected
Test circuit LIN
Test point 1 PCM connector B (49P) No. 16 (TAN)
Test point 2 Alternator 1P connector No. 1 (TAN)
Fig. 332: Checking Continuity Between PCM Connector B (49P) No. 16 (TAN) And
Alternator 1P Connector No. 1 (TAN)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES : The LIN wire is OK. Replace the alternator See ALTERNATOR OVERHAUL or
ALTERNATOR REMOVAL AND INSTALLATION , then do the repair verification .
NO : Repair an open in the LIN wire between the alternator and the PCM (B16), then do the repair
verification .
REPAIR VERIFICATION
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1. Turn the ignition switch to LOCK (0).
2. Reconnect all connectors.
3. Turn the ignition switch to ON (II)
4. Reset the PCM with the HDS See HOW TO TROUBLESHOOT THE FUEL AND EMISSIONS
SYSTEMS or HOW TO TROUBLESHOOT THE A/T SYSTEM .
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5. DO THE PCM IDLE LEARN PROCEDURE .
6. Check for Pending or Confirmed DTCs with the HDS.
Confirmed
DTC
Pending
DTC
Freeze
Frame
DTC Description
P16E2 PGM-FI-ACG LIN COMMUNICATION
ERROR
Is DTC P16E2 indicated?
YES : Check for poor connections or loose terminals at the alternator, the battery sensor, and the PCM. If the
PCM was updated, substitute a known-good PCM See PCM UPDATE or PCM REMOVAL AND
INSTALLATION , then recheck. If the PCM was substituted, go to step 1.
NO : Troubleshooting is complete. If the PCM was substituted, replace the original PCM See PCM UPDATE
or PCM REMOVAL AND INSTALLATION . If any other Pending or Confirmed DTCs are indicated, go to
the indicated DTC's troubleshooting.
DTC P16E3: PGM-FI-BATTERY SENSOR LIN COMMUNICATION ERROR
2024 Honda CR-V Owner's Manual
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