DTC P24BB (1.5 L Engine) (2020 2021)

DTC P24BB  : EVAP Leak Check Module Absolute Pressure Sensor Circuit High Voltage

NOTE: 

• Before you troubleshoot, review the general troubleshooting information .
• This DTC is stored if there is a blockage in the drain hose of the EVAP leak check module, check the EVAP canister filter and the drain hoses before troubleshooting.

DTC (PGM-FI)

1. EVAP system check

   -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.

   -5. Check the parameter (s) below with the HDS.

   Signal	Threshold		Current conditions
   	Values	Unit	Values	Unit
   Absolute Pressure of ELCM Pressure Sensor	More than 899	mmHg

   Do the current condition (s) match the malfunction threshold?

   YES 

   Go to step 3.

   NO 

   Go to step 2.

2. Problem verification

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

   DTC Description	Confirmed DTC	Pending DTC
   P24BB EVAP Leak Check Module Absolute Pressure Sensor Circuit High Voltage

   Is DTC P24BB indicated?

   YES 

   The failure is duplicated. Go to step 3.

   NO 

   Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the EVAP leak check module 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 .

3. Determine possible failure area (EVAP leak check module, others)

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

   -2. Disconnect the following connector.

   EVAP leak check module 8P connector

   -3. Connect terminals A and B with a jumper wire.

   Terminal A	EVAP leak check module 8P connector (female terminals) No. 7:
   Terminal B	EVAP leak check module 8P connector (female terminals) No. 8:

   Courtesy of HONDA, U.S.A., INC.

   -4. Turn the vehicle to the ON mode.

   -5. Check the parameter (s) below with the HDS.

   Signal	Threshold		Current conditions
   	Values	Unit	Values	Unit
   Absolute Pressure of ELCM Pressure Sensor	More than 899	mmHg

   Do the current condition (s) match the malfunction threshold?

   YES 

   Go to step 4.

   NO 

   Replace the EVAP leak check module .

4. Determine possible failure area (ELCMPA line, others)

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

   -2. Remove the jumper wire.

   -3. Turn the vehicle to the ON mode.

   -4. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   	EVAP leak check module 8P connector: disconnected
   Test point 1	EVAP leak check module 8P connector (female terminals) No. 6:
   Test point 2	EVAP leak check module 8P connector (female terminals) No. 8:

   Courtesy of HONDA, U.S.A., INC.

   Is there about 5.0 V?

   YES 

   Go to step 5.

   NO 

   Go to step 6.

5. Open wire check (ELCMPA 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. Connect terminals A and B with a jumper wire.

   Terminal A	EVAP leak check module 8P connector (female terminals) No. 7:
   Terminal B	Body ground

   Courtesy of HONDA, U.S.A., INC.

   -5. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	EVAP leak check module 8P connector: disconnected
   	EVAP leak check module 8P connector No. 7: jumped to body ground
   	PCM connector A (50P): disconnected
   Test point 1	PCM connector A (50P) No. 42

   Test point 2

   Body ground

   Is there continuity?

   YES 

   The ELCMPA wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM .

   NO 

   Repair an open in the ELCMPA wire between the PCM (A42) and the EVAP leak check module.

6. Open wire check (VCC6 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 E (80P)

   -4. Connect terminals A and B with a jumper wire.

   Terminal A	EVAP leak check module 8P connector (female terminals) No. 6:
   Terminal B	Body ground

   Courtesy of HONDA, U.S.A., INC.

   -5. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	PCM connector E (80P): disconnected
   	EVAP leak check module 8P connector: disconnected
   	EVAP leak check module 8P connector No. 6: jumped to body ground
   Test point 1	PCM connector E (80P) No. 63
   Test point 2	body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   Go to step 7.

   NO 

   Repair an open in the VCC6 wire between the PCM (E63) and the EVAP leak check module.

7. Open wire check (SG6 line)

   -1. Connect terminals A and B with a jumper wire.

   Terminal A	EVAP leak check module 8P connector (female terminals) No. 8:
   Terminal B	Body ground

   Courtesy of HONDA, U.S.A., INC.

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

   Test condition	Vehicle OFF (LOCK) mode
   	EVAP leak check module 8P connector: disconnected
   	PCM connector E (80P): disconnected
   	EVAP leak check module 8P connector No. 8: jumped to body ground
   Test point 1	PCM connector E (80P) No. 45
   Test point 2	Body ground

   Is there continuity?

   YES 

   The SG6 wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM .

   NO 

   Repair an open in the SG6 wire between the PCM (E45) and the EVAP leak check module.