Acura TSX / Honda Accord CL. Manual — part 944

Fig. 93: Checking For Continuity Between PCM Connector Terminal C12 & Body Ground

25. Shift to all positions other than N .

26. Measure the voltage between PCM connector terminals C20 and A8 or A9.

Is there about 5 V?

YES: Go to step 31 .

NO: Go to step 27.

2004 Acura TSX

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed

Fig. 94: Measuring The Voltage Between PCM Connector Terminals C20 & A8 Or A9

27. Turn the ignition switch OFF.

28. Jump the SCS line with the HDS.

29. Disconnect PCM connector C (22P).

30. Check for continuity between PCM connector terminal C20 and body ground.

Is there continuity?

YES: Repair short in the wire between PCM connector terminal C20 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. 95: Checking For Continuity Between PCM Connector Terminal C20 & Body Ground

31. Shift to all positions other than D .

32. Measure the voltage between PCM connector terminals C17 and A8 or A9.

Is there about 5 V?

YES: Go to step 37 .

NO: Go to step 33.

2004 Acura TSX

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed

Fig. 96: Measuring The Voltage Between PCM Connector Terminals C17 & A8 Or A9

33. Turn the ignition switch OFF.

34. Jump the SCS line with the HDS.

35. Disconnect PCM connector C (22P).

36. Check for continuity between PCM connector terminal C17 and body ground.

Is there continuity?

YES: Repair short in the wire between PCM connector terminal C17 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