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Engine Mount Control System Acura TL IV

Engine Control Systems 13 illustrations ~1873 words

Scheme 1

Scheme 1: Component Location Index
Scheme 1: Component Location Index

Scheme 2

Scheme 2: Without Keyless Access System
Scheme 2: Without Keyless Access System

Scheme 3

Scheme 3: With Keyless Access System
Scheme 3: With Keyless Access System

Troubleshooting

Special Tools Required

Vacuum pump/gauge, 0-30 in Hg

Snap-on YA4000A or equivalent, commercially available

M/T Model

Note. Check the vacuum hoses and lines for damage and proper connections before troubleshooting. The rubber mount should have dimples in it. This is normal. If the internal bladder ruptures, the rubber mount looks like it is bulging. Replace it (see FRONT ENGINE MOUNT REMOVAL AND INSTALLATION ).

Follow this procedure if the engine vibrates excessively when idling

Scheme 4

Scheme 4: M/T Model
Scheme 4: M/T Model

Scheme 5

Scheme 5
Scheme 5

Scheme 6

Scheme 6
Scheme 6

Scheme 7

Scheme 7
Scheme 7

Scheme 8

Scheme 8
Scheme 8

Scheme 9

Scheme 9
Scheme 9
  1. Remove the engine compartment covers (see «ENGINE COMPARTMENT COVER REPLACEMENT»(/acura/tl/iv-2008-2011/remont/exteriorinterior-trim/#exterior-trim__engine-compartment-cover-replacement) ).
  2. Start the engine, and let it idle
  3. Raise the engine speed from idling to 2,000 rpm
  4. Check the MOUNT CTRL SOL in the PGM-FI DATA LIST with the Honda Diagnostic System (HDS) Is ON indicated at idling and OFF indicated at 2,000 rpm? YES -Go to step 5 NO -Update the powertrain control module (PCM) if it does not have the latest software (see «ECM/PCM UPDATE»(/acura/tl/iv-2008-2011/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-update) ), or substitute a known-good PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tl/iv-2008-2011/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck If the engine mount control system works properly, and the PCM was updated, the troubleshooting is complete If the PCM was substituted, replace the original PCM (see «ECM/PCM REPLACEMENT»(/acura/tl/iv-2008-2011/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) )
  5. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode
  6. Disconnect the engine mount control solenoid valve 2P connector from the engine mount control solenoid valve
  7. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode
  8. Measure the voltage between engine mount control solenoid valve 2P connector terminal No 2 and body ground Is there battery voltage? YES -Go to step 9 NO -Repair open in the wire between engine mount control solenoid valve 2P connector terminal No 2 and No 13(15 A) fuse in the driver's under-dash fuse/relay box
  9. Start the engine, and let it idle
  10. Measure the voltage between engine mount control solenoid valve 2P connector terminals No 1 and No 2, with the engine at idle Is there battery voltage? YES -Go to step 11 NO -Repair open in the wire between PCM terminal A12 and engine mount control solenoid valve 2P connector terminal No 1 If the wire is OK, update the PCM if it does not have the latest software (see «ECM/PCM UPDATE»(/acura/tl/iv-2008-2011/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-update) ), or substitute a known-good PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tl/iv-2008-2011/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), and recheck If the engine mount control system works properly, and the PCM was updated, the troubleshooting is complete If the PCM was substituted, replace the original PCM (see «ECM/PCM REPLACEMENT»(/acura/tl/iv-2008-2011/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) )
  11. Raise the engine speed above 1,000 rpm
  12. Measure the voltage between engine mount control solenoid valve 2P connector terminals No 1 and No 2 Is there battery voltage? YES -Repair short to body ground in the wire between PCM terminal A12 and the engine mount control solenoid valve If the wire is OK, update the PCM if it does not have the latest software (see «ECM/PCM UPDATE»(/acura/tl/iv-2008-2011/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-update) ), or substitute a known-good PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tl/iv-2008-2011/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), and recheck. If the engine mount control system works properly, and the PCM was updated, the troubleshooting is complete If the PCM was substituted, replace the original PCM (see «ECM/PCM REPLACEMENT»(/acura/tl/iv-2008-2011/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ) NO -Reconnect the engine mount control solenoid valve 2P connector, then go to step 13.
  13. Press the engine start/stop button to select the OFF mode
  14. Disconnect the vacuum hose (A) from the engine mount control solenoid valve (B), and connect a vacuum pump/gauge, 0-30 in Hg, to the hose Apply about 20 in Hg of vacuum, and wait for 20 seconds Does the engine mount hold vacuum? YES -Reconnect the vacuum hose, then go to step 16 NO -Reconnect the vacuum hose, then go to step 15
  15. Disconnect the vacuum hose (A) from the two way valve, and connect a vacuum pump/gauge to the hose Apply about 20 in Hg of vacuum, and wait for 20 seconds Does the engine mount hold vacuum? YES -Repair the vacuum hose between the engine mount control solenoid valve and the two way valve NO -The vacuum hose or the front engine mount has a vacuum leak. Repair as needed
  16. Disconnect the vacuum hose (A) from the two way valve, then connect the vacuum pump/gauge to the vacuum hose
  17. Start the engine and let it idle, then apply vacuum to the mount. Is there a noticeable change in idle smoothness with and without vacuum applied? YES -Reconnect the vacuum hose to the two way valve, then go to step 18 NO -Replace the front engine mount (see «FRONT ENGINE MOUNT REMOVAL AND INSTALLATION»(/acura/tl/iv-2008-2011/remont/mechanical/#engine-removal-and-installation) )
  18. Disconnect vacuum hose (A) from engine mount control solenoid valve (B), then connect a vacuum pump/gauge to the engine mount control solenoid valve Is there manifold vacuum at idle, and a decrease in manifold vacuum when you raise the engine speed above 2,000 rpm? YES -The system is OK NO -Repair the vacuum hose (C) between the intake manifold and the engine mount control solenoid valve. If the vacuum hose is OK, replace the engine mount control solenoid valve

A/T Model

Note. Check the vacuum hoses and lines for damage and proper connections before troubleshooting. The rubber mount should have dimples in it. This is normal. If the internal bladder ruptures, the rubber mount looks like it is bulging. Replace it (see FRONT ENGINE MOUNT REMOVAL AND INSTALLATION ) or REAR ENGINE MOUNT REMOVAL AND INSTALLATION .

Follow this procedure if the engine vibrates excessively when idling

Scheme 10

Scheme 10
Scheme 10

Scheme 11

Scheme 11
Scheme 11

Scheme 12

Scheme 12
Scheme 12

Scheme 13

Scheme 13
Scheme 13
  1. Remove the engine compartment covers (see «ENGINE COMPARTMENT COVER REPLACEMENT»(/acura/tl/iv-2008-2011/remont/exteriorinterior-trim/#exterior-trim__engine-compartment-cover-replacement) ).
  2. Start the engine, and let it idle
  3. Raise the engine speed from idling to 2,000 rpm
  4. Check the MOUNT CTRL SOL in the PGM-FI DATA LIST with the Honda Diagnostic System (HDS) Is ON indicated at idling and OFF indicated at 2,000 rpm? YES -Go to step 5 NO -Update the powertrain control module (PCM) if it does not have the latest software (see «ECM/PCM UPDATE»(/acura/tl/iv-2008-2011/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-update) ), or substitute a known-good PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tl/iv-2008-2011/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck If the engine mount control system works properly, and the PCM was updated, the troubleshooting is complete If the PCM was substituted, replace the original PCM (see «ECM/PCM REPLACEMENT»(/acura/tl/iv-2008-2011/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) )
  5. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode
  6. Disconnect the engine mount control solenoid valve 2P connector from the engine mount control solenoid valve
  7. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode
  8. Measure the voltage between engine mount control solenoid valve 2P connector terminal No 2 and body ground Is there battery voltage? YES -Go to step 9 NO -Repair open in the wire between engine mount control solenoid valve 2P connector terminal No 2 and No 13 (15 A) fuse in the driver's under-dash fuse/relay box
  9. Start the engine, and let it idle
  10. Measure the voltage between engine mount control solenoid valve 2P connector terminals No 1 and No 2, with the engine at idle Is there battery voltage? YES -Go to step 11 NO -Repair open in the wire between PCM terminal A12 and engine mount control solenoid valve 2P connector terminal No 1 If the wire is OK, update the PCM if it does not have the latest software (see «ECM/PCM UPDATE»(/acura/tl/iv-2008-2011/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-update) ), or substitute a known-good PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tl/iv-2008-2011/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), and recheck If the engine mount control system works properly, and the PCM was updated, the troubleshooting is complete If the PCM was substituted, replace the original PCM (see «ECM/PCM REPLACEMENT»(/acura/tl/iv-2008-2011/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) )
  11. Raise the engine speed above 2,000 rpm
  12. Measure the voltage between engine mount control solenoid valve 2P connector terminals No 1 and No 2 Is there battery voltage? YES -Repair short to body ground in the wire between PCM terminal A12 and the engine mount control solenoid valve If the wire is OK, update the PCM if it does not have the latest software (see «ECM/PCM UPDATE»(/acura/tl/iv-2008-2011/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-update) ), or substitute a known-good PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tl/iv-2008-2011/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), and recheck If the engine mount control system works properly, and the PCM was updated, the troubleshooting is complete If the PCM was substituted, replace the original PCM (see «ECM/PCM REPLACEMENT»(/acura/tl/iv-2008-2011/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ) NO -Reconnect the engine mount control solenoid valve 2P connector, then go to step 13
  13. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode
  14. Disconnect the vacuum hose (A) from the engine mount control solenoid valve (B), and connect a vacuum pump/gauge, 0-30 in Hg, to the hose Apply about 20 in Hg of vacuum, and wait for 20 seconds Do both engine mounts hold vacuum? YES -Reconnect the vacuum hose, then go to step 17 NO -Reconnect the vacuum hose, then go to step 15
  15. Disconnect the vacuum hose (A) from the three way valve, and connect a vacuum pump/gauge, 0-30 in Hg, to the hose Apply about 20 in Hg of vacuum, and wait for 20 seconds Does the front engine mount hold vacuum? YES -Go to step 16 NO -The vacuum hose or the front engine mount has a vacuum leak Repair as needed
  16. Disconnect the vacuum hose (A) from the three way valve, and connect a vacuum pump/gauge, 0-30 in Hg, to the hose Apply about 20 in Hg of vacuum, and wait for 20 seconds Does the rear engine mount hold vacuum? YES -Repair the vacuum hose (B) between the engine mount control solenoid valve and the three way valve NO -The vacuum hose or the rear engine mount has a vacuum leak Repair as needed
  17. Disconnect the vacuum hose (A) from the three way valve Block the open port, then connect the vacuum pump to the vacuum hose
  18. Start the engine and let it idle, then apply vacuum to the mount Is there a noticeable change in idle smoothness with and without vacuum applied? YES -Reconnect the vacuum hose to the three way valve, then go to step 19 NO -Replace the front engine mount (see «FRONT ENGINE MOUNT REMOVAL AND INSTALLATION»(/acura/tl/iv-2008-2011/remont/mechanical/#engine-removal-and-installation) )
  19. Disconnect the vacuum hose (A) from the three way valve Block the open port, then connect the vacuum pump to the vacuum hose Is there a noticeable change in idle smoothness with and without vacuum applied? YES -Reconnect the vacuum hose to the three way valve, then go to step 20 NO -Replace the rear engine mount (see «REAR ENGINE MOUNT REMOVAL AND INSTALLATION»(/acura/tl/iv-2008-2011/remont/mechanical/#engine-removal-and-installation) )
  20. Disconnect the vacuum hose (A) from the engine mount control solenoid valve, then connect a vacuum pump/gauge to the engine mount control solenoid valve. Is there manifold vacuum at idle, and a decrease in manifold vacuum when you raise the engine speed above 2,000 rpm? YES -The system is OK NO -Repair the vacuum hose (C) between the intake manifold and the engine mount control solenoid. If the vacuum hose is OK, replace the engine mount control solenoid valve