Acura TSX / Honda Accord CL. Manual — part 573

Fig. 5: Checking For Continuity Between Body Ground And ECM/PCM Connector Terminal B13

Is there continuity?

YES -Test the alternator (see GENERATORS & REGULATORS ).

NO -Repair open in the wire between the ECM/PCM (B13) and the alternator.

13. Turn the ignition switch OFF.

14. Jump the SCS line with the HDS.

15. Disconnect ECM/PCM connector B (24P).

16. Check for continuity between body ground and ECM/PCM connector terminal B13.

2004 Acura TSX

2004 ENGINE PERFORMANCE Idle Control System - TSX

Fig. 6: Checking For Continuity Between Body Ground And ECM/PCM Connector Terminal B13

Is there continuity?

YES -Repair short in the wire between the ECM/PCM (B13) and the alternator.

NO -Update the ECM/PCM if it does not have the latest software, or substitute a known-good
ECM/PCM, then recheck (see HOW TO SUBSTITUTE THE ECM/PCM ). If the symptom/indication
goes away with a known-good ECM/PCM, replace the original ECM/PCM.

PSP SWITCH SIGNAL CIRCUIT TROUBLESHOOTING

1. Start the engine, and let it idle.

2. Align the steering wheel straight ahead.

3. Check the PSP SWITCH in the DATA LIST with the HDS.

2004 Acura TSX

2004 ENGINE PERFORMANCE Idle Control System - TSX

Does it indicate OFF?

YES -Go to step 4.

NO -Go to step 12.

4. Turn the steering wheel to the full lock position.

5. Check the PSP SWITCH in the DATA LIST with the HDS.

Does it change to ON?

YES -The PSP switch signal circuit is OK.

NO -Go to step 6.

6. Disconnect the PSP switch 2P connector.

7. Check the PSP SWITCH in the DATA LIST with the HDS.

Does it change to ON?

YES -Replace the PSP switch.

NO -Go to step 8.

8. Turn the ignition switch OFF.

9. Jump the SCS line with the HDS.

10. Disconnect ECM/PCM connector E (31P).

11. Check for continuity between PSP switch 2P connector terminal No. 1 and body ground.

2004 Acura TSX

2004 ENGINE PERFORMANCE Idle Control System - TSX

Fig. 7: Checking For Continuity Between PSP Switch 2P Connector Terminal No. 1 And Body
Ground

Is there continuity?

YES -Repair short in the wire between the ECM/PCM (E16) and the PSP switch.

NO -Update the ECM/PCM if it does not have the latest software, or substitute a known-good
ECM/PCM, then recheck (see HOW TO SUBSTITUTE THE ECM/PCM ). If the symptom/indication
goes away with a known-good ECM/PCM, replace the original ECM/PCM.

12. Turn the ignition switch OFF.

13. Disconnect the PSP switch 2P connector.

14. Connect PSP switch 2P connector terminals No. 1 and No. 2 with a jumper wire, then start the engine.

2004 Acura TSX

2004 ENGINE PERFORMANCE Idle Control System - TSX