Acura TSX / Honda Accord CL. Manual — part 984

1. Clear the DTC with the HDS.

2. Start the engine in the P position.

3. Check that DTC P0985 recurs.

Is DTC P0985 indicated?

YES: Go to step 7 .

NO: Go to step 4.

4. Select SHIFT SOL TEST in MISC. TEST MENU, then carry out A/T SHIFT SOL E test in SHIFT SOL

TEST MENU with the HDS.

5. Start the engine in the P position.

6. Check the OBD STATUS in DTCs MENU for a pass/fail test of code P0985.

Did the result indicate a fail?

YES: Go to step 7.

NO: Intermittent failure, the system is OK at this time. Check the YEL wire for an
intermittent short to ground between the shift solenoid valve E and PCM. If the tester
indicates NOT COMPLETE, return to step 4 and recheck.

7. Turn the ignition switch OFF.

8. Jump the SCS line with the HDS.

9. Disconnect PCM connectors A (31P) and C (22P).

10. Measure the resistance between PCM connector terminals C3 and A8 or A9.

Is there less than 12 ohm ?

YES: Go to step 11.

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.

troubleshoot.

z

This code is caused by an electrical circuit problem and cannot be caused
by a mechanical problem in the transmission.

2004 Acura TSX

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed

Fig. 202: Measuring The Resistance Between PCM Connector Terminals C3 & A8 Or A9

11. Disconnect the shift solenoid harness connector at the transmission housing.

12. Check for continuity between PCM connector terminals C3 and A8 or A9.

Is there continuity?

YES: Repair short to ground in the wire between PCM connector terminal C3 and the shift
solenoid harness connector, then go to step 13.

NO: Check shift solenoid valve E, and check for a short in the shift solenoid harness in the
transmission (see SHIFT SOLENOID VALVE TEST ). Replace shift solenoid valve E
and/or shift solenoid harness, then go to step 13.

2004 Acura TSX

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed

Fig. 203: Checking For Continuity Between PCM Connector Terminals C3 & A8 Or A9

13. Clear the DTC with the HDS.

14. Start the engine in the P position.

15. Check the OBD STATUS in DTCs MENU for a pass/fail test of code P0985.

Did the result indicate a pass?

YES: The problem has been corrected.

NO: Return to step 1 and recheck.

DTC P0986: OPEN IN SHIFT SOLENOID VALVE E CIRCUIT

NOTE:

z

Record all freeze data and review General Troubleshooting Information (see
GENERAL TROUBLESHOOTING INFORMATION ) before you troubleshoot.

z

This code is caused by an electrical circuit problem and cannot be caused by a
mechanical problem in the transmission.

1. Clear the DTC with the HDS.

2. Start the engine, and shift the transmission in 2nd gear in the M position.

3. Check that DTC P0986 recurs.

2004 Acura TSX

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed

Is DTC P0986 indicated?

YES: Go to step 7 .

NO: Go to step 4.

4. Select SHIFT SOL TEST in MISC. TEST MENU, then carry out A/T SHIFT SOL E

test in SHIFT SOL TEST MENU with the HDS.

5. Start the engine, and shift the transmission in 2nd gear in the M position.

6. Check the OBD STATUS in DTCs MENU for a pass/fail test of code P0986.

Did the result indicate a fail?

YES: Go to step 7.

NO: Intermittent failure, the system is OK at this time. Check for
poor connections or loose terminals at the shift solenoid valve E
and PCM. If the tester indicates NOT COMPLETE, return to step 4
and recheck.

7. Turn the ignition switch OFF.

8. Jump the SCS line with the HDS.

9. Disconnect PCM connectors A (31P) and C (22P).

10. Measure the resistance between PCM connector terminals C3 and A8 or A9.

Is there 12-25 ohm ?

YES: Check for loose or poor connections at PCM connector
terminal C3. If the connection is OK, 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 11.

2004 Acura TSX

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed