Acura TSX / Honda Accord CL. Manual — part 607

20. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see

HOW TO SUBSTITUTE THE ECM/PCM ).

21. Hold the engine at 3,000-4,000 RPM for at least 60 seconds.

22. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS.

Are any Temporary DTCs or DTCs indicated?

YES: If DTC P0325 is indicated, check for poor connections or loose terminals at the knock
sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are
indicated, go to the indicated DTC troubleshooting.

NO: If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was
substituted, replace the original ECM/PCM (see HOW TO REMOVE THE ECM/PCM
FOR TESTING ).

DTC P0335: CKP SENSOR NO SIGNAL

1. Turn the ignition switch ON (II).

2. Clear the DTC with the HDS.

3. Start the engine.

4. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS.

Is DTC P0335 indicated?

YES: Go to step 5.

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

5. Turn the ignition switch OFF.

6. Disconnect the CKP sensor 3P connector.

7. Turn the ignition switch ON (II).

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

Is there battery voltage?

YES: Go to step 9.

NO: Repair open in the wire between the CKP sensor and PGM-FI main relay 1, then go to
step 19 .

2004 Acura TSX

2004 ENGINE PERFORMANCE PGM-FI System - TSX

Fig. 66: Measuring Voltage Between CKP Sensor 3P Connector Terminal No. 1 & Body
Ground

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

Is there about 5 V?

YES: Go to step 10.

NO: Go to step 11 .

2004 Acura TSX

2004 ENGINE PERFORMANCE PGM-FI System - TSX

Fig. 67: Measuring Voltage Between CKP Sensor 3P Connector Terminal No. 2 & Body
Ground

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

Is there battery voltage?

YES: Go to step 16 .

NO: Repair open in the wire between the CKP sensor and G101, then go to step 19 .

2004 Acura TSX

2004 ENGINE PERFORMANCE PGM-FI System - TSX

Fig. 68: Measuring Voltage Between CKP Sensor 3P Connector Terminals No. 1 & No. 3

11. 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, then go to
step 19 .

NO: Go to step 12.

2004 Acura TSX

2004 ENGINE PERFORMANCE PGM-FI System - TSX