DTC P0340 (2.4 L Engine) (2017 2018 2019)

DTC P0340  : CMP Sensor A No Signal

NOTE:  Before you troubleshoot, review the general troubleshooting information .

DTC (PGM-FI)

1. 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. Open wire check (IG1 ACG/IG1 (MAIN)/IG1 (CAM) line)

   -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 (female terminals) No. 1:
   Test point 2	Body ground

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

   Is there battery voltage?

   YES 

   The IG1 ACG/IG1 (MAIN)/IG1 (CAM) wire is OK. Go to step 3.

   NO 

   Repair an open in the IG1 ACG/IG1 (MAIN)/IG1 (CAM) wire between No. D21 (10 A) fuse in the under-dash fuse/relay box and CMP sensor A.

3. Determine possible failure area (CAM line, LG/LG2 line)

   -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 (female terminals) No. 3:
   Test point 2	Body ground

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

   Is there about 5.0 V?

   YES 

   Go to step 4.

   NO 

   Go to step 5.

4. Open wire check (LG/LG2 line)

   -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 (female terminals) No. 1:
   Test point 2	CMP sensor A 3P connector (female terminals) No. 2:

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

   Is there battery voltage?

   YES 

   The LG/LG2 wire is OK. Replace CMP sensor A .

   NO 

   Repair an open in the LG/LG2 wire between CMP sensor A and G101.

5. Shorted wire check (CAM 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 B (51P)

   -4. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	CMP sensor A 3P connector: disconnected
   	PCM connector B (51P): disconnected
   Test point 1	PCM connector B (51P) No. 39

   Test point 2

   Body ground

   Is there continuity?

   YES 

   Repair a short in the CAM wire between the PCM (B39) and CMP sensor A.

   NO 

   The CAM wire is not shorted. Go to step 6.

6. Open wire check (CAM 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 B (51P): disconnected
   Test point 1	CMP sensor A 3P connector (female terminals) No. 3:
   Test point 2	PCM connector B (51P) No. 39

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

   Is there continuity?

   YES 

   The CAM 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 CAM wire between the PCM (B39) and CMP sensor A.