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A/t Interlock System Acura TL III

Automatic Trans 7 illustrations ~1261 words

Scheme 1

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

Scheme 2

Scheme 2: Circuit Diagram
Scheme 2: Circuit Diagram

Scheme 3

Scheme 3: Shift Lock System/Reverse Lock System Circuit Troubleshooting
Scheme 3: Shift Lock System/Reverse Lock System Circuit Troubleshooting

Scheme 4

Scheme 4
Scheme 4
  1. Press the brake pedal. Are the brake lights ON? YES - Go to step 2. NO - Repair faulty brake light circuit.
  2. Connect the HDS to the DLC. Check engine speed and accelerator pedal position in the A/T data list. Is the engine speed at idle, and APS1 about 0.5 V and APS2 about 0.2 V? YES - Go to step 3. NO - Repair engine speed or accelerator pedal position input.
  3. Select SHIFT LOCK SOL TEST in MISC. TEST MENU, then carry out shift lock solenoid function test. Dose the shift lock solenoid work properly? YES - System circuit is OK. Check the shift lock mechanism, if necessary. NO - Go to step 4.
  4. Remove the center console (see «CENTER CONSOLE REAR SECTION REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/gauges-instrument-panels/#consoles__center-console-rear-section-removalinstallation) ).
  5. Disconnect the shift lock solenoid connector.
  6. Turn the ignition switch ON (II).
  7. Measure the voltage between No. 1 terminal of the shift lock solenoid connector and body ground. Is there battery voltage? YES - Go to step 8. NO - Check for blown No. 32 fuse in the under-dash fuse/relay box. If the fuse is OK, repair open in the wire between the shift lock solenoid connector and the under-dash fuse/relay box.
  8. Shift the shift lever into the P position, and press the brake pedal. Do not press the accelerator.
  9. Measure the voltage between shift lock solenoid connector terminals while pressing the brake pedal. Is there battery voltage? YES - Check the shift lock mechanism. If the mechanism is OK, replace the shift lock solenoid (see «Shift Lock Solenoid Replacement»(/acura/tl/iii-2003-2006/remont/automatic-trans/#at-interlock-system__shift-lock-solenoid-replacement) ). NO - Check for poor or loose PCM connector terminal A22 at the PCM, and check for an open in the wire between PCM connector terminal A22 and shift lock solenoid connector. If the connection and wire are OK, substitute a known-good PCM and recheck.

Key Interlock System Circuit Troubleshooting

SRS components are located in this area. Review the SRS component locations (see AIR BAG SRS (SUPPLEMENTAL RESTRAINT SYSTEM) ) , and the precautions and procedures (see AIR BAG SRS (SUPPLEMENTAL RESTRAINT SYSTEM) ) , in the SRS before performing repairs or service.

Scheme 5

Scheme 5: Key Interlock System Circuit Troubleshooting
Scheme 5: Key Interlock System Circuit Troubleshooting

Scheme 6

Scheme 6
Scheme 6
  1. Turn the ignition switch to ACC (I). The shift lever must be in the P position.
  2. Disconnect the steering lock assembly connector.
  3. Check if the ignition key can be moved to LOCK (0) position, and remove the key from the cylinder. Is the ignition key able to move to the LOCK (0) position, and then removed? YES - Go to step 4. NO - Replace the ignition key cylinder/steering lock assembly (see «STEERING LOCK REPLACEMENT»(/acura/tl/iii-2003-2006/remont/manual-power-steering/#power-steering-system) ).
  4. Turn the ignition switch to ACC (I) or ON (II), and shift to the N position.
  5. Check for the voltage between the No. 4 terminal of the steering lock assembly connector and body ground. Is there battery voltage? YES - Go to step 6. NO - Check for an open in the (WHT/GRN) wire between the MICU and the steering lock assembly connector. If the wire is Ok, substitute a known-good multiplex integrated control unit and recheck.
  6. Turn the ignition switch to ACC (I), and shift to the P position.
  7. Remove the center console (see «CENTER CONSOLE REAR SECTION REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/gauges-instrument-panels/#consoles__center-console-rear-section-removalinstallation) ).
  8. Disconnect the park pin switch connector.
  9. Check for continuity between park pin switch connector terminals No. 1 and No. 4 while pushing the button of the shift lever in, and when released. Is there continuity when pushing the button in, and no continuity when it's released? YES - Check for an open in the wire between the multiplex integrated control unit and the park pin switch connector. If the wire is Ok, replace the multiplex integrated control unit. NO - Replace the park pin switch (see «Park Pin Switch Replacement»(/acura/tl/iii-2003-2006/remont/automatic-trans/#at-interlock-system__park-pin-switch-replacement) ).

Key Interlock Solenoid Test

SRS components are located in this area. Review the SRS component locations (see AIR BAG SRS (SUPPLEMENTAL RESTRAINT SYSTEM) ) , and the precautions and procedures (see AIR BAG SRS (SUPPLEMENTAL RESTRAINT SYSTEM) ) , in the SRS before performing repairs or service.

  1. Remove the driver's dashboard lower cover (see «DRIVER'S DASHBOARD LOWER COVER REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/exteriorinterior-trim/#dashboard) ). and lower steering column cover.
  2. Disconnect steering lock assembly connector.
  3. Insert the ignition key in the key cylinder, then turn the ignition key to ACC (I).
  4. Connect the battery positive terminal to steering lock assembly connector terminal No. 4, and connect the battery negative terminal to No. 3 terminal. Make sure that the ignition key cannot be turned to LOCK (0) position. Release the battery terminals, and make sure that the key can be turned to LOCK (0) position and removed from the cylinder.
  5. If the key interlock solenoid works improperly, replace the ignition key cylinder/steering lock assembly (see «STEERING LOCK REPLACEMENT»(/acura/tl/iii-2003-2006/remont/manual-power-steering/#power-steering-system) ).

Scheme 7

Scheme 7
Scheme 7

Shift Lock Solenoid Test

  1. Connect the HDS to DLC.
  2. Select SHIFT LOCK SOL TEST in MISC. TEST MENU with the HDS.
  3. Carry out shift lock solenoid function test: Check that the shift lever can be moved from the P position when SOLENOID ON. Move the shift lever back to the P position, and make sure it locks with SOLENOID OFF.
  4. Check that the shift lock releases when the shift lock release is pushed, and check that it locks when the shift lock release is released.
  5. If the shift lock solenoid does not work properly, perform shift lock system troubleshooting (see «Shift Lock System/Reverse Lock System Circuit Troubleshooting»(/acura/tl/iii-2003-2006/remont/automatic-trans/#at-interlock-system) ).

Shift Lock Solenoid Replacement

  1. Remove the center console (see «CENTER CONSOLE REAR SECTION REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/gauges-instrument-panels/#consoles__center-console-rear-section-removalinstallation) ).
  2. Release the tab (A) retaining the shift lock solenoid.
  3. Raise the shift lock solenoid bushing (B) just enough to slide the shift lock solenoid out.
  4. Install the shift lock solenoid plunger (C) and plunger spring (D) in the new shift lock solenoid (E).
  5. Apply silicon grease to joint of the shift lock solenoid plunger, if necessary.
  6. Install the new shift lock solenoid by aligning the joint of the shift lock solenoid plunger with the tip of the shift lock stop (F).
  7. Install the center console (see «CENTER CONSOLE REAR SECTION REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/gauges-instrument-panels/#consoles__center-console-rear-section-removalinstallation) ).

Park Pin Switch Test

  1. Remove the center console (see «CENTER CONSOLE REAR SECTION REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/gauges-instrument-panels/#consoles__center-console-rear-section-removalinstallation) ).
  2. Disconnect transmission gear selection switch/park pin switch connector.
  3. Shift the shift lever into the P position, then check for continuity between connector terminals No. 1 and No. 4. There should be no continuity.
  4. Shift out of the P position, and check for continuity between terminals No. 1 and No. 4. There should be continuity.
  5. If the park pin switch is faulty, replace it.
  6. Install the center console (see «CENTER CONSOLE REAR SECTION REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/gauges-instrument-panels/#consoles__center-console-rear-section-removalinstallation) ).

Park Pin Switch Replacement

  1. Remove the center console (see «CENTER CONSOLE REAR SECTION REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/gauges-instrument-panels/#consoles__center-console-rear-section-removalinstallation) ).
  2. Disconnect transmission gear selection switch/park pin switch connector (A), then remove the connector from the shift lever bracket base.
  3. Remove the A/T gear position indicator panel light bulb socket (B), then remove the bulb (C) from the socket.
  4. Remove the transmission gear selection switch/park pin switch (D) by releasing the lock tabs (E).
  5. Install the new switch assembly in the shift lever bracket base.
  6. Install the bulb in the socket, then install the socket in the bracket base.
  7. Install the switch connector on the bracket base, then connect the connector.
  8. Install the center console (see «CENTER CONSOLE REAR SECTION REMOVAL/INSTALLATION»(/acura/tl/iii-2003-2006/remont/gauges-instrument-panels/#consoles__center-console-rear-section-removalinstallation) ).

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