Acura TSX / Honda Accord CL. Manual — part 978
DTC P0973: SHORT IN SHIFT SOLENOID VALVE A CIRCUIT
1. Clear the DTC with the HDS.
2. Start the engine, and shift to the D position.
3. Check that DTC P0973 recurs.
Is DTC P0973 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 A 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 P0973.
Did the result indicate a fail?
YES: Go to step 7.
NO: Intermittent failure, the system is OK at this time. Check the BLU/BLK wire for an
intermittent short to ground between shift solenoid valve A 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 C6 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.
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. 186: Measuring The Resistance Between PCM Connector Terminals C6 & A8 Or A9
11. Disconnect the shift solenoid harness connector at the transmission housing.
12. Check for continuity between PCM connector terminals C6 and A8 or A9.
Is there continuity?
YES: Repair short to ground in the wire between PCM connector terminal C6 and the shift
solenoid harness connector, then go to step 13.
NO: Check shift solenoid valve A, and check for a short in the shift solenoid harness in the
transmission (see SHIFT SOLENOID VALVE TEST ). Replace shift solenoid valve A
and/or shift solenoid harness, then go to step 13.
2004 Acura TSX
2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed
Fig. 187: Checking For Continuity Between PCM Connector Terminals C6 & 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 P0973.
Did the result indicate a pass?
YES: The problem has been corrected.
NO: Return to step 1 and recheck.
DTC P0974: OPEN IN SHIFT SOLENOID VALVE A 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 P0974 recurs.
Is DTC P0974 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 A 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 P0974.
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 A 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 C6 and A8 or A9.
Is there 12-25 ohm?
YES: Check for loose or poor connections at PCM connector terminal C6. 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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