DTC Troubleshooting: P0335 (4-1), P0339 (4-6)

DTC P0335 (4-1):  CKP Sensor No Signal
  
  

1.Reset the ECM/PCM.

2.Start the engine.

Is DTC P0335 and/or P0339 indicated?


YES - Go to 3.


NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the CKP sensor and at the ECM/PCM.n


3.Turn the ignition switch OFF.

4.Disconnect the CKP sensor 3P connector.

5.Turn the ignition switch ON (II).

6.Measure voltage between the CKP sensor 3P connector terminal No. 1 and body ground.

 

Is there battery voltage?


YES - Go to 7.


NO - Repair open in the wire between the PGM-FI main relay 1 and the CKP sensor.n

7.Measure voltage between the CKP sensor 3P connector terminal No. 2 and body ground.

 

Is there about 5 V?


YES - Go to 8.


NO - Go to 10.


8.Measure voltage between the CKP sensor 3P connector terminals No. 1 and No. 3.

 

Is there battery voltage?


YES - Go to 9.


NO - Repair open in the wire between the CKP sensor and G101.n

9.Substitute a known-good CKP sensor and recheck.

Is DTC P0335 and/or P0339 indicated?


YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original  ECM/ PCM.n


NO - Replace the original  CKP sensor.n


10.Measure voltage between ECM/PCM connector terminal A7 and body ground.

 

Is there about 5 V?


YES - Repair open in the wire between the ECM/PCM (A7) and the CKP sensor.n


NO - Go to 11.


11.Turn the ignition switch OFF.

12.Disconnect ECM/PCM connector A (31P).

13.Check for continuity between ECM/PCM connector terminal A7 and body ground.

 

Is there continuity?


YES - Repair short in the wire between the ECM/PCM (A7) and the CKP sensor.n


NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original  ECM/ PCM.n