DTC P24B8

WARNING: This page is about a different variant/trim than selected.

DTC P24B8 : EVAP Leak Check Module Absolute Pressure Sensor Out of Range

NOTE:

Before you troubleshoot, review the general troubleshooting information .
If DTC P24BA and/or P24BB are stored at the same time as DTC P24B8, troubleshoot those DTCs first, then recheck for DTC P24B8.

DTC Description	Confirmed DTC	Pending DTC
P24B8 EVAP Leak Check Module Absolute Pressure Sensor Out of Range

DTC (PGM-FI)

Problem verification 1

-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
Signal	Values	Unit	Values	Unit
Absolute Pressure of ELCM Pressure Sensor	More than 857	mmHg

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

YES

Go to step 3.

Go to step 2.

Problem verification 2

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

DTC Description	Confirmed DTC	Pending DTC
P24B8 EVAP Leak Check Module Absolute Pressure Sensor Out of Range

Is DTC P24B8 indicated?

YES

The failure is duplicated. Go to step 3.

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 .

Determine possible failure area (VCC6 line, others)

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

-2. Disconnect the following connector.

EVAP leak check module 8P connector

-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 4.

Go to step 6.

Determine possible failure area (ELCMPA line, others)

-1. Check the parameter(s) below with the HDS.

Signal	Threshold		Current conditions
Signal	Values	Unit	Values	Unit
Absolute Pressure of ELCM Pressure Sensor	Less than 331	mmHg

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

YES

Go to step 8.

Go to step 5.

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

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

-2. 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.

-3. Turn the vehicle to the ON mode.

-4. Check the parameter(s) below with the HDS.

Signal	Threshold		Current conditions
Signal	Values	Unit	Values	Unit
Absolute Pressure of ELCM Pressure Sensor	More than 857	mmHg

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

YES

Go to step 9.

Replace the EVAP leak check module .

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. Measure the resistance between test points 1 and 2.

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

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

Is there 1.0 Ω or less?

YES

Go to step 7.

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

Open wire check (SG6 line)

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

Test condition	Vehicle OFF (LOCK) mode
	EVAP leak check module 8P connector: disconnected
	PCM connector E (80P): disconnected
Test point 1	PCM connector E (80P) No. 45
Test point 2	EVAP leak check module 8P connector (female terminals) No. 8:

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

Is there 1.0 Ω or less?

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 .

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

Shorted 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. Measure the resistance between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	EVAP leak check module 8P connector: disconnected
	PCM connector A (50P): disconnected
Test point 1	EVAP leak check module 8P connector (female terminals) No. 7:
Test point 2	Body ground

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

Is there 1 MΩ or more?

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 .

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

Open wire check (ELCMPA line)

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

-2. Remove the jumper wire from the EVAP leak check module 8P connector.

-3. Jump the SCS line with the HDS, and wait more than 1 minute.

-4. Disconnect the following connector.

PCM connector A (50P)

-5. Measure the resistance between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	EVAP leak check module 8P connector: disconnected
	PCM connector A (50P): disconnected
Test point 1	PCM connector A (50P) No. 42
Test point 2	EVAP leak check module 8P connector (female terminals) No. 7:

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

Is there 1.0 Ω or less?

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 .

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