Acura RL. Manual - part 256

NO - Check for poor connections and loose terminals at the transmission gear selection switch and the
PCM, then go to step 1. If the HDS indicates NOT COMPLETED, return to step 19 and recheck.

DTC P0958: Open in Transmission Gear Selection Switch Circuit, or Transmission Gear Selection Switch Stuck OFF

1. Start the engine.

2. With the brake pedal pressed, shift to M.

3. Verify the transmission gear selection switch sequential sportshift mode switch signal inputs with the

HDS in the A/T data list.

Is sequential sportshift mode SW OFF?

YES - Go to step 4.

NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at
the transmission gear selection switch and the PCM.

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

5. Disconnect the transmission gear selection switch/park pin switch/A/T gear position indicator panel light

connector.

6. Check for continuity between transmission gear selection switch/park pin switch/A/T gear position

indicator panel light connector terminals No. 2 and No. 3.

Fig. 135: Checking Continuity Between Transmission Gear Selection Switch Connector Terminals
No. 2 And No. 3
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity when the shift lever is in M, and no continuity when the shift lever is shifted out of the

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.

2007 Acura RL

2005-08 TRANSMISSION Automatic Transmission - RL

Friday, June 05, 2009 1:18:12 PM

Page 195

YES - Go to step 7.

NO - Replace the transmission gear selection switch (see TRANSMISSION GEAR SELECTION
SWITCH TEST ), then go to step 17.

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

8. Measure the voltage between transmission gear selection switch/park pin switch/A/T gear position

indicator panel light connector terminal No. 3 and body ground.

Fig. 136: Measuring Voltage Between Transmission Gear Selection Switch Connector Terminal No.
3 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES - Repair open in the wire between transmission gear selection switch/park pin switch/A/T gear
position indicator panel light connector terminal No. 2 and ground (G503), or repair poor ground (G503),
then go to step 17.

NO - Go to step 9.

9. Measure the voltage between PCM connector terminal E30 and body ground.

Fig. 137: Measuring Voltage Between PCM Connector Terminal E30 And Body Ground

2007 Acura RL

2005-08 TRANSMISSION Automatic Transmission - RL

Friday, June 05, 2009 1:18:12 PM

Page 196

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES - Repair open in the wire between PCM connector terminal E30 and the transmission gear selection
switch connector, then go to step 17.

NO - Go to step 10.

10. Connect the transmission gear selection switch/park pin switch/A/T gear position indicator panel light

connector.

11. 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 ).

12. Start the engine, and shift to M while pressing the brake pedal firmly.

13. Push the shift lever toward the upshift position (+) slowly, and release it; repeat this test at least twice.

14. Pull the shift lever toward the downshift position (-) slowly, and release it; repeat this test at least twice.

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

Is DTC P0958 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 16.

16. Monitor the OBD STATUS for P0958 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 15, go to the
INDICATED DTC'S TROUBLESHOOTING.

NO - Check for poor connections and loose terminals at the transmission gear selection switch and the
PCM. 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. If the HDS indicates NOT COMPLETED, return to
step 12 and recheck.

17. Clear the DTC with the HDS.

18. Start the engine, and shift to M while pressing the brake pedal firmly.

19. Push the shift lever toward the upshift position (+) slowly, and release it; repeat this test at least twice.

20. Pull the shift lever toward the downshift position (-) slowly, and release it; repeat this test at least twice.

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

2007 Acura RL

2005-08 TRANSMISSION Automatic Transmission - RL

Friday, June 05, 2009 1:18:12 PM

Page 197

Is DTC P0958 indicated?

YES - Check for poor connections and loose terminals at the transmission gear selection switch and the
PCM, then go to step 1.

NO - Go to step 22.

22. Monitor the OBD STATUS for P0958 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 21, go to the INDICATED
DTC'S TROUBLESHOOTING.

NO - Check for poor connections and loose terminals at the transmission gear selection switch and the
PCM, then go to step 1. If the HDS indicates NOT COMPLETED, return to step 18 and recheck.

DTC P0962: Problem in A/T Clutch Pressure Control Solenoid Valve A Circuit

1. Clear the DTC with the HDS.

2. Check that DTC P0962 recurs.

Is DTC P0962 indicated?

YES - Go to step 6.

NO - Go to step 3.

3. Select Clutch Pressure Control (Linear) Solenoid A in the Miscellaneous Test Menu, and test A/T clutch

pressure control solenoid valve A with the HDS.

Does the HDS indicate NORMAL?

YES - Go to step 4.

NO - Go to step 6.

4. In the Clutch Pressure Control Solenoid Valve Control menu, select A/T Clutch Pressure Control

Solenoid Valve A at 1.0 A.

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.

2007 Acura RL

2005-08 TRANSMISSION Automatic Transmission - RL

Friday, June 05, 2009 1:18:12 PM

Page 198

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