DTC Troubleshooting: P24BA
DTC P24BA: EVAP Leak Check Module Absolute Pressure Sensor Circuit Low Voltage
NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description
Confirmed DTC
Pending DTC
P24BA EVAP Leak Check Module Absolute Pressure Sensor Circuit Low Voltage
    

1.
EVAP system check:

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
Less than 331
mmHg
    

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

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
Go to step 2.
2.
Problem verification:

Problem verification
?1.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
P24BA EVAP Leak Check Module Absolute Pressure Sensor Circuit Low Voltage
    

Is DTC P24BA 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 (ELCMPA line, others):

Determine possible failure area (ELCMPA 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.
Check the parameter(s) below with the HDS.
Signal
Threshold
Current conditions
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 4.
     
NO
     
     
     
Go to step 5.
4.
Shorted wire check (ELCMPA line):

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.
Check for continuity 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


Is there continuity?

     
YES
     
     
     
Repair a short in the ELCMPA wire between the PCM (A42) and the EVAP leak check module.?
     
NO
     
     
     
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.?
5.
Determine possible failure area (EVAP leak check module pressure sensor, others):

Determine possible failure area (EVAP leak check module pressure sensor, others)
?1.
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
Body ground


Is there about 5.0 V?

     
YES
     
     
     
     
NO
     
     
     
Go to step 6.
6.
Open wire check (VCC6 line):

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


?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. 6: jumped to body ground
PCM connector E (80P): disconnected
Test point 1
PCM connector E (80P) No. 63
Test point 2
Body ground

Is there continuity?

     
YES
     
     
     
The VCC6 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 VCC6 wire between the PCM (E63) and the EVAP leak check module.?