Acura TSX / Honda Accord CL. Manual — part 943

symptom/indication goes away with a known-good PCM, replace the original PCM.

NO: Repair open in the wire between PCM connector terminals A8, A9 and ground (G101),
or repair poor ground (G101), then go to step 49 .

Fig. 89: Checking For Continuity Between PCM Connector Terminals A8 & Body Ground &
Between A9 & Body Ground

14. Shift to all positions other than R .

15. Measure the voltage between PCM connector terminals D5 and A8 or A9.

Is there about 5 V?

YES: Go to step 20 .

NO: Go to step 16.

2004 Acura TSX

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed

Fig. 90: Measuring The Voltage Between PCM Connector Terminals D5 & A8 Or A9

16. Turn the ignition switch OFF.

17. Jump the SCS line with the HDS.

18. Disconnect PCM connector D (17P).

19. Check for continuity between PCM connector terminal D5 and body ground.

Is there continuity?

YES: Repair short in the wire between PCM connector terminal D5 and the transmission
range switch, then go to step 49 .

NO: Update the PCM if it does not have the latest software, or substitute a known-good
PCM (see PCM UPDATING & SUBSTITUTION FOR TESTING ), then recheck. If the
symptom/indication goes away with a known-good PCM, replace the original PCM.

2004 Acura TSX

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed

Fig. 91: Checking For Continuity Between PCM Connector Terminal D5 & Body Ground

20. Measure the voltage between PCM connector terminals C12 and A8 or A9.

Is there about 5 V?

YES: Go to step 25 .

NO: Go to step 21.

2004 Acura TSX

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed

Fig. 92: Measuring The Voltage Between PCM Connector Terminals C12 & A8 Or A9

21. Turn the ignition switch OFF.

22. Jump the SCS line with the HDS.

23. Disconnect PCM connector C (22P)

24. Check for continuity between PCM connector terminal C12 and body ground.

Is there continuity?

YES: Repair short in the wire between PCM connector terminal C12 and the transmission
range switch, then go to step 49 .

NO: Update the PCM if it does not have the latest software, or substitute a known-good
PCM (see PCM UPDATING & SUBSTITUTION FOR TESTING ), then recheck. If the
symptom/indication goes away with a known-good PCM, replace the original PCM.

2004 Acura TSX

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed