Acura TSX / Honda Accord CL. Instruction — page 957

Fig. 136: Checking For Continuity Between Countershaft Speed Sensor Connector Terminal
No. 3 & Body Ground

16. Connect PCM connector A (31P).

17. Turn the ignition switch ON (II).

18. Measure the voltage between countershaft speed sensor connector terminals No. 2 and No. 3.

Is there about 5 V?

YES: Go to step 19.

NO: Go to step 28 .

2004 Acura TSX

2004 AUTOMATIC TRANSMISSIONS Diagnosis — MCTA 5-Speed

Fig. 137: Measuring The Voltage Between Countershaft Speed Sensor Connector Terminals
No. 2 & No. 3

19. Connect countershaft speed sensor connector.

20. Measure the voltage between PCM connector terminals A18 and A8 or A9.

Is there 0 V or about 5 V?

YES: Go to step 21.

NO: Replace the countershaft speed sensor (see COUNTERSHAFT SPEED SENSOR
REPLACEMENT
), then go to step 29 .

2004 Acura TSX

2004 AUTOMATIC TRANSMISSIONS Diagnosis — MCTA 5-Speed

Fig. 138: Measuring The Voltage Between PCM Connector Terminals A18 & A8 Or A9

21. Shift to the P position. Start the engine, and let it idle.

22. Shift to the D position, and measure the voltage between PCM connector terminals A18 and A8 or A9.

Is there 1.5 V-3.5 V?

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: Replace the countershaft speed sensor (see COUNTERSHAFT SPEED SENSOR
REPLACEMENT
), then go to step 29 .

2004 Acura TSX

2004 AUTOMATIC TRANSMISSIONS Diagnosis — MCTA 5-Speed

Fig. 139: Measuring The Voltage Between PCM Connector Terminals A18 & A8 Or A9

23. Measure the voltage between PCM connector terminals A20 and A8 or A9.

Is there 4.75 V-5.25 V?

YES: Repair open in the wire between PCM connector A20 and the countershaft speed
sensor, then go to step 29 .

NO: Go to step 24.

2004 Acura TSX

2004 AUTOMATIC TRANSMISSIONS Diagnosis — MCTA 5-Speed

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