Fig. 384: DTC Troubleshooting Flow Chart (P2184)
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 .
DTC Description
Confirmed DTC Pending DTC Freeze Frame
P2184 ECT SENSOR 2 CIRCUIT LOW VOLTAGE
1. Problem verification:
ο‘
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1. Turn the ignition switch to ON (II).
2. Check the parameter(s) below with the HDS.
Threshold
Values
Current conditions
Unit Values Unit
Signal
ECT SENSOR 2 Less than 0.08 V
Do the current condition(s) match the threshold?
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
ECT sensor 2 and the PCM.
2. ECT sensor 2 check:
ο‘
1. Turn the ignition switch to LOCK (0).
2. Disconnect the following connector.
ο‘
ECT Sensor 2 2P connector
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3. Turn the ignition switch to ON (II).
4. Check the parameter(s) below with the HDS.
Threshold
Values
Current conditions
Unit Values Unit
Signal
ECT SENSOR 2 Less than 0.08 V
Do the current condition(s) match the threshold?
YES : Go to step 3.
NO : REPLACE ECT SENSOR 2 , then do the repair verification .
3. Shorted wire check (TW2 SENSOR line):
ο‘
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1. Turn the ignition switch to LOCK (0).
2. Jump the SCS line with the HDS.
3. Disconnect the following connector.
PCM connector A (49P)
ο‘
4. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
ECT Sensor 2 2P connector: disconnected
PCM connector A (49P): disconnected
Test circuit TW2 SENSOR
Test point 1 ECT sensor 2 2P connector No. 2 (PNK)
Test point 2 Body ground
Fig. 385: Checking Continuity Between ECT Sensor 2 2P Connector No. 2 (PNK) And Body
Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES : Repair a short in the TW2 SENSOR wire between the PCM (A44) and ECT sensor 2, then do the
repair verification .
NO : The TW2 SENSOR wire is OK. Update the PCM See PCM REMOVAL AND
INSTALLATION or PCM UPDATE if it does not have the latest software, or substitute a known-
good PCM See PCM UPDATE or PCM REMOVAL AND INSTALLATION , 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 A/T SYSTEM or HOW
TO TROUBLESHOOT THE FUEL AND EMISSIONS SYSTEMS .
ο‘
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5. DO THE PCM IDLE LEARN PROCEDURE .
6. Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC Pending DTC Freeze Frame
P2184 ECT SENSOR 2 CIRCUIT LOW VOLTAGE
Is DTC P2184 indicated?
YES : Check for poor connections or loose terminals at ECT sensor 2 and the PCM. If the PCM was updated,
substitute a known-good PCM See PCM REMOVAL AND INSTALLATION or PCM UPDATE , 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
REMOVAL AND INSTALLATION or PCM UPDATE . If any other Pending or Confirmed DTCs are
indicated, go to the indicated DTC's troubleshooting.
DTC P2185: ECT SENSOR 2 CIRCUIT HIGH VOLTAGE
Fig. 386: DTC Troubleshooting Flow Chart (P2185)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
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