Acura TSX / Honda Accord CL. Manual - part 981

 

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Acura TSX / Honda Accord CL. Manual - part 981

 

 

1. Clear the DTC with the HDS.  

2. Start the engine, and shift to the D position.  

3. Check that DTC P0979 recurs. 

Is DTC P0979 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 C test in SHIFT SOL 

TEST MENU with the HDS.  

5. Start the engine, and shift to the D position.  

6. Check the OBD STATUS in DTCs MENU for a pass/fail test of code P0979. 

Did the result indicate a fail? 

YES: Go to step 7.  

NO: Intermittent failure, the system is OK at this time. Check the GRN wire for an 
intermittent short to ground between the shift solenoid valve C 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 C2 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. 194: Measuring The Resistance Between PCM Connector Terminals C2 & A8 Or A9 

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

12. Check for continuity between PCM connector terminals C2 and A8 or A9. 

Is there continuity? 

YES: Repair short to ground in the wire between PCM connector terminal C2 and the shift 
solenoid harness connector, then go to step 13.  

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

 

2004 Acura TSX 

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed

  

 

Fig. 195: Checking For Continuity Between PCM Connector Terminals C2 & A8 Or A9 

13. Clear the DTC with the HDS.  

14. Start the engine, and shift to the D position.  

15. Check the OBD STATUS in DTCs MENU for a pass/fail test of code P0979. 

Did the result indicate a pass? 

YES: The problem has been corrected.  

NO: Return to step 1 and recheck.  

DTC P0980: OPEN IN SHIFT SOLENOID VALVE C CIRCUIT 

1. Clear the DTC with the HDS.  

2. Start the engine in the P position.  

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.  

 

2004 Acura TSX 

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed

  

 

3. Check that DTC P0980 recurs. 

Is DTC P0980 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 C 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 P0980. 

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 C 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 C2 and A8 or A9. 

Is there 12-25 ohm? 

YES: Check for loose or poor connections at PCM connector terminal C2. 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

  

 

 

 

 

 

 

 

 

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