Acura RL. Instruction — page 263

connector, then go to step 24.

NO — Go to step 13.

13. Inspect shift solenoid valve A (see SHIFT SOLENOID VALVE TEST AND REPLACEMENT ).

Is shift solenoid valve A OK?

YES — Go to step 14.

NO — Replace shift solenoid valve A or the shift solenoid harness (see SHIFT SOLENOID VALVE
TEST AND REPLACEMENT
), then go to step 24.

14. Disconnect PCM connector D (17P).

15. Turn the ignition switch to ON (II).

16. Measure the voltage between PCM connector terminals D12 and A3 or B15.

Fig. 161: Measuring Voltage Between PCM Connector Terminals D12 And A3 Or B15
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES — Go to step 19.

NO — Go to step 17.

17. Turn the ignition switch to LOCK (0).

18. Check for continuity between PCM connector terminals A3 and body ground, and between B15 and body

ground.

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Fig. 162: Checking Continuity Between PCM Connector Terminals A3[B15] And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES — Check for blown No. 20 fuse in the driver’s under-dash fuse/relay box. If the fuse is OK, repair
open in the wire between PCM connector terminal D12 and the driver’s under-dash fuse/relay box, then
go to step 24.

NO — Repair open in the wires between PCM connector terminals A3, B15, and ground (G101, G102), or
repair poor ground (G101, G102), then go to step 24.

19. Reconnect all connectors.

20. Update the A/T software in the PCM if it does not have the latest software (see UPDATING THE

PCM ), or substitute a known-good PCM (see SUBSTITUTING THE PCM ).

21. Start the engine in P. With the brake pedal pressed, shift to R, and wait for at least 1 second, then move

the shift lever back into P.

22. Check for DTC(s) in the DTCs/Freeze Data in A/T Mode Menu with the HDS.

Is DTC P0973 indicated?

YES — If the PCM was updated, substitute a known-good PCM (see SUBSTITUTING THE PCM ),
then recheck. If the PCM was substituted, go to step 1.

NO — Go to step 23.

23. Monitor the OBD STATUS for P0973 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.

Does the HDS indicate PASSED?

YES — If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the
original PCM (see PCM REPLACEMENT ). If any other DTCs were indicated on step 22, go to the
INDICATED DTCS TROUBLESHOOTING.

NO — Check for poor connections and loose terminals at shift solenoid valve A and the PCM. If the PCM
was updated, substitute a known-good PCM (see SUBSTITUTING THE PCM ), then recheck. If the

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PCM was substituted, go to step 1. If the HDS indicates NOT COMPLETED, return to step 21 and
recheck.

24. Clear the DTC with the HDS.

25. Start the engine in P. With the brake pedal pressed, shift to R, and wait for at least 1 second, then move

the shift lever back into P.

26. Check for DTC(s) in the DTCs/Freeze Data in A/T Mode Menu with the HDS.

Is DTC P0973 indicated?

YES — Check for poor connections and loose terminals at shift solenoid valve A and the PCM, then go to
step 1.

NO — Go to step 27.

27. Monitor the OBD STATUS for P0973 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.

Does the HDS indicate PASSED?

YES — Troubleshooting is complete. If any other DTCs were indicated on step 26, go to the INDICATED
DTCS TROUBLESHOOTING
.

NO — Check for poor connections and loose terminals at shift solenoid valve A and the PCM, then go to
step 1. If the HDS indicates NOT COMPLETED, return to step

25

and recheck.

DTC P0974: Open in Shift Solenoid Valve A Circuit

1. Clear the DTC with the HDS.

2. Start the engine in P, and wait for at least 1 second.

3. Check that DTC P0974 recurs.

Is DTC P0974 indicated?

YES — Go to step 7.

NO — Go to step 4.

4. Select Shift Solenoid A in Miscellaneous Test Menu, and test shift solenoid valve A with the HDS.

NOTE:

Before you troubleshoot, record all freeze data and any on-board
snapshot, and review General Troubleshooting Information (see GENERAL
TROUBLESHOOTING INFORMATION ).

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

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Is a clicking sound heard ?

YES — Go to step 5.

NO — Go to step 7.

5. Start the engine in P, and wait for at least 1 second.

6. Monitor the OBD STATUS for P0974 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.

Does the HDS indicate FAILED?

YES — Go to step 7.

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

7. Turn the ignition switch to LOCK (0).

8. Jump the SCS line with the HDS.

9. Disconnect PCM connectors A (31P), B (24P), and C (22P).

10. Measure the resistance between PCM connector terminals C1 and A3 or B15.

Fig. 163: Measuring Resistance Between PCM Connector Terminals C1 And A3 Or B15
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there 12-25 ohms?

YES — Go to step 15.

NO — Go to step 11.

11. Disconnect the shift solenoid harness connector.

12. Check for continuity between PCM connector terminal C1 and shift solenoid harness connector terminal

No. 3.

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