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