Acura TSX / Honda Accord CL. Manual — part 945

Fig. 97: Checking For Continuity Between PCM Connector Terminal C17 & Body Ground

37. Shift to all positions other than D

3

.

38. Measure the voltage between PCM connector terminals C9 and A8 or A9.

Is there about 5 V?

2004 Acura TSX

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed

YES: Go to step 43 .

NO: Go to step 39.

Fig. 98: Measuring The Voltage Between PCM Connector Terminals C9 & A8 Or A9

39. Turn the ignition switch OFF.

40. Jump the SCS line with the HDS.

41. Disconnect PCM connector C (22P).

42. Check for continuity between PCM connector terminal C9 and body ground.

Is there continuity?

YES: Repair short in the wire between PCM connector terminal C9 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. 99: Checking For Continuity Between PCM Connector Terminal C9 & Body Ground

43. Shift to all positions other than D and D

3

.

44. Measure the voltage between PCM connector terminals C18 and A8 or A9.

Is there about 5 V?

2004 Acura TSX

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed

YES: 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.

NO: Go to step 45.

Fig. 100: Measuring The Voltage Between PCM Connector Terminals C18 & A8 Or A9

45. Turn the ignition switch OFF.

46. Jump the SCS line with the HDS.

47. Disconnect PCM connector C (22P).

48. Check for continuity between PCM connector terminal C18 and body ground.

Is there continuity?

YES: Repair short in the wire between PCM connector terminal C18 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