DTC Troubleshooting: P0340
DTC P0340: CMP Sensor A No Signal
NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description
Confirmed DTC
Pending DTC
P0340 CMP Sensor A No Signal
    

1.
Problem verification:

Problem verification
?1.
Turn the vehicle to the ON mode.

?2.
Clear the DTC with the HDS.


?3.
Start the engine.

?4.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
P0340 CMP Sensor A No Signal
    

Is DTC P0340 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 CMP sensor A 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.?
2.
Determine possible failure area (VCC2 line, others):

Determine possible failure area (VCC2 line, others)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
CMP sensor A 3P connector

?3.
Turn the vehicle to the ON mode.

?4.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
 
CMP sensor A 3P connector: disconnected
Test point 1
CMP sensor A 3P connector No. 1
Test point 2
Body ground


Is there about 5.0 V?

     
YES
     
     
     
The VCC2 wire is OK. Go to step 4.
     
NO
     
     
     
Go to step 3.
3.
Open wire check (VCC2 line):

Open wire check (VCC2 line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Jump the SCS line with HDS, and wait more than 1 minute.


?3.
Disconnect the following connector.
PCM connector E (80P)

?4.
Check the continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
CMP sensor A 3P connector: disconnected
 
PCM connector E (80P): disconnected
Test point 1
CMP sensor A 3P connector No. 1
Test point 2
PCM connector E (80P) No. 77


Is there continuity?

     
YES
     
     
     
The VCC2 wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. If DTC P0340 goes away and the PCM was substituted, replace the original PCM.?
     
NO
     
     
     
Repair an open in the VCC2 wire between the PCM (E77) and CMP sensor A.?
4.
Determine possible failure area (TDCAM line, others):

Determine possible failure area (TDCAM line, others)
?1.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
 
CMP sensor A 3P connector: disconnected
Test point 1
CMP sensor A 3P connector No. 3
Test point 2
Body ground


Is there about 5.0 V?

     
YES
     
     
     
Go to step 5.
     
NO
     
     
     
Go to step 7.
5.
Determine possible failure area (SG2 line, others):

Determine possible failure area (SG2 line, others)
?1.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
 
CMP sensor A 3P connector: disconnected
Test point 1
CMP sensor A 3P connector No. 1
Test point 2
CMP sensor A 3P connector No. 2


Is there about 5.0 V?

     
YES
     
     
     
The SG2 wire is OK. Replace CMP sensor A.?
     
NO
     
     
     
Go to step 6.
6.
Open wire check (SG2 line):

Open wire check (SG2 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.
Disconnected the following connector.
PCM connector E (80P)

?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
CMP sensor A 3P connector: disconnected
 
PCM connector E (80P): disconnected
Test point 1
CMP sensor A 3P connector No. 2
Test point 2
PCM connector E (80P) No. 78


Is there continuity?

     
YES
     
     
     
The SG2 wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. If DTC P0340 goes away and the PCM was substituted, replace the original PCM.?
     
NO
     
     
     
Repair an open in the SG2 wire between the PCM (E78) and CMP sensor A.?
7.
Shorted wire check (TDCAM line):

Shorted wire check (TDCAM 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.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
CMP sensor A 3P connector: disconnected
 
PCM connector E (80P): disconnected
Test point 1
PCM connector E (80P) No. 43
Test point 2
Body ground

Is there continuity?

     
YES
     
     
     
Repair a short in the TDCAM wire between the PCM (E43) and CMP sensor A.?
     
NO
     
     
     
The TDCAM wire is not shorted. Go to step 8.
8.
Open wire check (TDCAM line):

Open wire check (TDCAM line)
?1.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
CMP sensor A 3P connector: disconnected
 
PCM connector E (80P): disconnected
Test point 1
CMP sensor A 3P connector No. 3
Test point 2
PCM connector E (80P) No. 43


Is there continuity?

     
YES
     
     
     
The TDCAM wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. If DTC P0340 goes away and the PCM was substituted, replace the original PCM.?
     
NO
     
     
     
Repair an open in the TDCAM wire between the PCM (E43) and CMP sensor A.?