Ignition Switch Acura TL IV

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Key Interlock System Circuit Troubleshooting

SRS components are located in this area Review the SRS component locations (see COMPONENT LOCATION INDEX ) and the precautions and procedures (see PRECAUTIONS AND PROCEDURES ) before doing repair or service

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1. Move the shift lever to P and set the parking brake
2. Turn the ignition switch to ACC (I)
3. Disconnect the steering lock assembly connector
4. Check if the ignition switch can be turned to LOCK (0) Can the ignition switch be turned to LOCK (0)? YES -Go to step 5 NO -Replace the ignition key cylinder/steering lock assembly (see «STEERING LOCK REPLACEMENT»(/acura/tl/iv-2008-2011/remont/electronic-steering/#power-steering-system) )
5. Make sure the ignition switch is turned to LOCK (0)
6. Move the shift lever out of P
7. Check for continuity between steering lock assembly connector terminal No 3 and body ground Is there continuity? YES -Repair short to body ground in the wire between the key interlock solenoid and the driver's MICU NO -Go to step 8
8. Remove the center console panel (see «CENTER CONSOLE PANEL REMOVAL/INSTALLATION»(/acura/tl/iv-2008-2011/remont/gauges-instrument-panels/#consoles__center-console-panel-removalinstallation) )
9. Disconnect the A/T shift lock solenoid/park pin switch 4P connector
10. Check for continuity between A/T shift lock solenoid/park pin switch 4P connector terminal No 4 and body ground Is there continuity? YES -Repair short to body ground in the wire between A/T shift lock solenoid/park pin switch 4P connector terminal No 4 and the driver's MICU NO -Go to step 11
11. Check for continuity between A/T shift lock solenoid/park pin switch 4P connector terminal No 3 and body ground Is there continuity? YES -Go to step 12 NO -Repair open in the between AT shift lock solenoid/park pin switch and G403
12. Shift the shift lever to P
13. Check for continuity between A/T shift lock solenoid/park pin switch 4P connector terminals No 3 and No 4 Do not push the shift lever button Is there continuity? YES -Go to step 14 NO -Replace the park pin switch (see «PARK PIN SWITCH REPLACEMENT»(/acura/tl/iv-2008-2011/remont/automatic-trans/#automatic-transmission) )
14. Disconnect driver's under-dash fuse/relay box connector F (33P)
15. Check for continuity between driver's under-dash fuse/relay box connector F (33P) terminal No 4 and body ground Is there continuity? YES -Repair short to ground in the wire NO -Go to step 16
16. Disconnect the transmission range switch connector
17. Check for continuity between driver's under-dash fuse/relay box connector F (33P) terminal No 4 and transmission range switch connector terminal No. 7 Is there continuity? YES -Go to step 18 NO -Repair open in the wire between the driver's under-dash fuse/relay box and the transmission range switch
18. At the transmission range switch, check for continuity between the terminals No 6 and No 7 Is there continuity? YES -Go to step 19 NO -Check the transmission range switch adjustment (see «TRANSMISSION RANGE SWITCH REPLACEMENT»(/acura/tl/iv-2008-2011/remont/automatic-trans/#automatic-transmission) ) and retest If the still no continuity, replace the transmission range switch
19. Check for continuity between transmission range switch harness terminal No 5 and body ground

Is there continuity?

YES -Substitute a known-good driver's under-dash fuse/relay box and retest

NO -Repair open in the wire between the transmission range switch and G101

Key Interlock Solenoid Test

SRS components are located in this area Review the SRS component locations (see COMPONENT LOCATION INDEX ) and the precautions and procedures (see PRECAUTIONS AND PROCEDURES ) before doing repairs or service

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1. Remove the steering column cover (see «STEERING COLUMN COVER REMOVAL/INSTALLATION»(/acura/tl/iv-2008-2011/remont/exteriorinterior-trim/#dashboard__steering-column-cover-removalinstallation) )
2. Disconnect the steering lock assembly connector
3. Turn the ignition switch to ACC (I)
4. Connect the positive battery terminal to steering lock assembly connector terminal No 4, and ground to steering lock assembly connector terminal No 3 Check that the ignition key cannot be turned to LOCK (0) Disconnect power, and check that the key can be turned to the 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/iv-2008-2011/remont/electronic-steering/#power-steering-system) )

Scheme 11

1. Remove the center console panel (see «CENTER CONSOLE PANEL REMOVAL/INSTALLATION»(/acura/tl/iv-2008-2011/remont/gauges-instrument-panels/#consoles__center-console-panel-removalinstallation) )
2. Disconnect the A/T shift lock solenoid/park pin switch 4P connector (A) from the park pin switch (B)
3. Check for continuity between terminals No 3 and No 4 There should be continuity when shift the shift out of P There should be no continuity when shift the shift lever to P
4. If the continuity is not as specified, replace the park pin switch (see «PARK PIN SWITCH REPLACEMENT»(/acura/tl/iv-2008-2011/remont/automatic-trans/#automatic-transmission) )

SRS components are located in the area Review the SRS component locations (see COMPONENT LOCATION INDEX ) and precautions and procedures (see PRECAUTIONS AND PROCEDURES ) before doing repairs or servicing

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1. Do the battery terminal disconnection procedure (see «BATTERY TERMINAL DISCONNECTION AND RECONNECTION»(/acura/tl/iv-2008-2011/remont/body-electrical/#battery) )
2. Remove the steering column covers (see «STEERING COLUMN COVER REMOVAL/INSTALLATION»(/acura/tl/iv-2008-2011/remont/exteriorinterior-trim/#dashboard__steering-column-cover-removalinstallation) )
3. Disconnect the 5P connector (A) from the ignition switch (B)
4. Check for continuity between the terminals in each switch position according to the table
5. If the continuity is not as specified, replace the ignition switch (see «Ignition Switch Replacement»(/acura/tl/iv-2008-2011/remont/steering-column-switches/#ignition-switch) )
6. Do the battery terminal reconnection procedure (see «BATTERY TERMINAL DISCONNECTION AND RECONNECTION»(/acura/tl/iv-2008-2011/remont/body-electrical/#battery) )

Note. SRS components are located in the area Review the SRS component locations (see COMPONENT LOCATION INDEX ) and precautions and procedures (see PRECAUTIONS AND PROCEDURES ) before doing repairs or servicing

Scheme 14

1. Do the battery terminal disconnection procedure (see «BATTERY TERMINAL DISCONNECTION AND RECONNECTION»(/acura/tl/iv-2008-2011/remont/body-electrical/#battery) )
2. Remove the steering column covers (see «STEERING COLUMN COVER REMOVAL/INSTALLATION»(/acura/tl/iv-2008-2011/remont/exteriorinterior-trim/#dashboard__steering-column-cover-removalinstallation) )
3. Disconnect the 5P connector (A) from the ignition switch (B)
4. Remove the two screws and the ignition switch
5. Install the parts in the reverse order of removal
6. Do the battery terminal reconnection procedure (see «BATTERY TERMINAL DISCONNECTION AND RECONNECTION»(/acura/tl/iv-2008-2011/remont/body-electrical/#battery) )

See also:
• COMPONENT LOCATION INDEX
• STEERING LOCK REPLACEMENT
• CENTER CONSOLE PANEL REMOVAL/INSTALLATION
• PARK PIN SWITCH REPLACEMENT
• STEERING COLUMN COVER REMOVAL/INSTALLATION
• BATTERY TERMINAL DISCONNECTION AND RECONNECTION
• Ignition Switch Replacement