Acura TSX / Honda Accord CL. Manual - part 977

pressure control solenoid valve C, then go to step 12. 

Fig. 183: Measuring The Voltage Between A/T Clutch Pressure Control Solenoid Valve C 
Connector Terminals No. 1 & No. 2 

12. Clear the DTC with the HDS.  

13. Test-drive the vehicle for several minutes in the D position in all five gears.  

14. Check the OBD STATUS in DTCs MENU for a pass/fail test of code P0970. 

Did the result indicate a pass? 

YES: The problem has been corrected.  

NO: Return to step 1 and recheck.  

DTC P0971: PROBLEM IN A/T CLUTCH PRESSURE CONTROL SOLENOID VALVE C 

 

2004 Acura TSX 

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed

  

 

1. Clear the DTC with the HDS.  

2. Check that DTC P0971 recurs. 

Is DTC P0971 indicated? 

YES: Go to step 6 .  

NO: Go to step 3.  

3. Select P CTRL SOL CONTROL in MISC. TEST MENU, then select P. CONTROL SOL C in P CTRL 

SOL CTRL MENU with the HDS.  

4. Drive with the A/T clutch pressure control solenoid valve C at 0.2 A in SOL C CONTROL menu.  

5. Check the OBD STATUS in DTCs MENU for a pass/fail test of code P0971. 

Did the result indicate a fail? 

YES: Go to step 6.  

NO: Intermittent failure, the system is OK at this time. Check for poor connections or loose 
terminals at the A/T clutch pressure control solenoid valve C and PCM. If the tester indicates 
NOT COMPLETE, return to step 3 and recheck.  

6. Turn the ignition switch OFF.  

7. Disconnect the A/T clutch pressure control solenoid valve C connector.  

8. Measure A/T clutch pressure control solenoid valve C resistance at the solenoid connector. 

Is there 3-10 ohm? 

YES: Go to step 9.  

NO: Replace the A/T clutch pressure control solenoid valve C (see A/T CLUTCH 
PRESSURE CONTROL SOLENOID VALVE B & C REPLACEMENT ), then go to 
step 10 .  

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

  

 

Fig. 184: Measuring A/T Clutch Pressure Control Solenoid Valve C Resistance At The 
Solenoid Connector 

9. Check for continuity between A/T clutch pressure control solenoid valve C connector terminal No. 2 and 

body ground. 

Is there continuity? 

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: Repair open in the wire between the A/T clutch pressure control solenoid valve C and 
ground (G101), or repair poor ground (G101), then go to step 10.  

 

2004 Acura TSX 

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed

  

 

Fig. 185: Checking For Continuity Between A/T Clutch Pressure Control Solenoid Valve C 
Connector Terminal No. 2 & Body Ground 

10. Clear the DTC with the HDS.  

11. Test-drive the vehicle for several minutes in the D position in all five gears.  

12. Check the OBD STATUS in DTCs MENU for a pass/fail test of code P0971. 

Did the result indicate a pass? 

YES: The problem has been corrected.  

NO: Return to step 1 1 and recheck. 

 

2004 Acura TSX 

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed