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Home/Acura/TL/Acura TL IV (2008-2011)/Repair manual/Interior/illumination Lights/Entry Lights Control System
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Entry Lights Control System Acura TL IV

Interior/illumination Lights 9 illustrations ~1922 words

Scheme 18

Scheme 18: Component Location Index
Scheme 18: Component Location Index

Scheme 19

Scheme 19
Scheme 19

Scheme 20

Scheme 20: Circuit Diagram
Scheme 20: Circuit Diagram

Scheme 21

Scheme 21
Scheme 21

Control Unit Input Test

Note. Before testing, troubleshoot the multiplex integrated control system first, using B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A )

Driver's MICU

Scheme 22

Scheme 22: Control Unit Input Test
Scheme 22: Control Unit Input Test

Scheme 23

Scheme 23
Scheme 23

Scheme 24

Scheme 24
Scheme 24
  1. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode
  2. Remove the driver's dashboard undercover (see «DRIVER'S DASHBOARD UNDERCOVER REMOVAL/INSTALLATION»(/acura/tl/iv-2008-2011/remont/exteriorinterior-trim/#dashboard) )
  3. Disconnect driver's under-dash fuse/relay box connectors D, P, Q, and R NOTE: All connector views are wire side of female terminals
  4. Inspect the connector and socket terminals to be sure they are all making good contact If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system If the terminals look OK, go to step 5
  5. Reconnect the connectors to the driver's under-dash fuse/relay box, and do these input tests at the following connectors If any test indicates a problem, find and correct the cause, then recheck the system If all the input tests prove OK, go to step 6 TEST CONDITION CAVITY CHART Cavity Wire Test condition Test Desired result Possible cause if desired result is not obtained Q1 BLK In all ignition switch positions or all power modes Measure the voltage to ground There should be less than 0 2V Poor ground (G402) An open or high resistance in the wire Q2 BRN In all ignition switch positions or all power modes Measure the voltage to ground There should be less than 0 2V Poor ground(G401) or open in ground wire An open or high resistance in the wire R2 BRN In all ignition switch positions or all power modes Measure the voltage to ground There should be less than 0 2V Poor ground(G401) or open in ground wire An open or high resistance in the wire R5 BLK In all ignition switch positions or all power modes Measure the voltage to ground There should be less than 0 2V Poor ground(G402) or open in ground wire An open or high resistance in the wire D4 LT GRN Left rear door open Measure the voltage to ground There should be less than 0 2V Faulty left rear door switch Faulty left rear door switch ground An open in the wire Left rear door closed Measure the voltage to ground There should be about 5 V Faulty left rear door switch A short to ground in the wire D12 GRN Driver's door open Measure the voltage to ground There should be less than 0 2V Faulty driver's door switch An open in the wire Driver's door closed Measure the voltage to ground There should be about 5 V Faulty driver's door switch A short to ground in the wire P4 LT GRN Interior light switch in the DOOR position Attach to ground with a jumper wire; The individual map lights should come on Blown No 16 (7 5 A) fuse in the under-hood fuse/relay box Faulty roof console An open or high resistance in the wire Q11 *1 ORN Under all conditions Attach to ground with a jumper wire; The remote slot light should come on Blown No 12 (10 A) fuse in the passenger's under-dash fuse/relay box Faulty remote slot light An open or high resistance in the wire Q11 *2 ORN Under all conditions Attach to ground with a jumper wire; The ignition key light should come on Blown No 16 (7 5 A) fuse in the under-hood fuse/relay box Faulty ignition key light An open or high resistance in the wire Q18 *1 RED Remote key inserted into the reomote slot Measure the voltage to ground There should be less than 0 2V Faulty remote slot Faulty power control unit An open or high resistance in the wire Remote key removed from the reomote slot Measure the voltage to ground There should be about 5 V Faulty remote slot Faulty power control unit A short to ground in the wire Q18 *2 RED Ignition key inserted into the ignition switch Measure the voltage to ground There should be less than 0 2V Faulty ignition key switch An open or high resistance in the wire Poor ground(G403) or open in ground wire Ignition switch LOCK (0), and the ignition key removed from the ignition switch Measure the voltage to ground There should be about 5 V Faulty ignition key switch A short to ground in the wire *1: With Keyless access system *2: Without keyless access system Passenger's MICU
  6. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode, and remove the right kick panel (see «TRIM REMOVAL/INSTALLATION - DOOR AREAS»(/acura/tl/iv-2008-2011/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-door-areas) )
  7. Disconnect passenger's under-dash fuse/relay box connectors A, E, and G *1 (or H *2 ) *1 Without SH-AWD *2 With SH-AWD NOTE: All connector views are wire side of female terminals
  8. Inspect the connector and socket terminals to be sure they are all making good contact If the terminals are bent, loose or corroded, repair them as necessary and recheck the system If the terminals look OK, go to step 9
  9. Reconnect the connectors to the passenger's under-dash fuse/relay box, and do these input tests at the following connectors If any test indicates a problem, find and correct the cause, then recheck the system If all the input tests prove OK, go to step 10 TEST CONDITION CAVITY CHART Cavity Wire Test condition Test Desired result Possible cause if desired result is not obtained A14 WHT Under all conditions Measure the voltage to ground There should be battery voltage Blown No 15(10 A) fuse in the under-hood fuse/relay box Faulty driver's under-dash fuse/relay box An open or high resistance in the wire A35 BRN Ignition switch ON (II), or power mode ON Measure the voltage to ground There should be battery voltage Blown No 12 (7 5 A) fuse in the driver's under-dash fuse/relay box Faulty driver's under-dash fuse/relay box An open or high resistance in the wire A36 BLK In all ignition switch positions or all power modes Measure the voltage to ground There should be less than 0 2V Poor ground(G405) or open in ground wire An open or high resistance in the wire A37 GRY In all ignition switch positions or all power modes Measure the voltage to ground There should be less than 0 2V Poor ground(G401) or open in ground wire An open or high resistance in the wire E15 BLK In all ignition switch positions or all power modes Measure the voltage to ground There should be less than 0 2V Poor ground (G201) or an open in ground wire An open or high resistance in the wire E16 BLK In all ignition switch positions or all power modes Measure the voltage to ground There should be less than 0 2V Poor ground(G203) or open in ground wire An open or high resistance in the wire G14 (1) or H25 (2) LT GRN Right rear door open Measure the voltage to ground There should be less than 0 2V Faulty right rear door switch An open in the wire Right rear door closed Measure the voltage to ground There should be about 5 V Faulty right rear door switch Faulty right rear door switch ground An open or high resistance in the wire G15 (1) or H3 (2) LT BLU Front passenger's door open Measure the voltage to ground There should be less than 0 2V Faulty front passenger's door switch Faulty front passenger's door switch ground An open or high resistance in the wire Front passenger's door closed Measure the voltage to ground There should be about 5 V Faulty front passenger's door switch A short to ground in the wire (1) Without SH-AWD (2) With SH-AWD Door Multiplex Control Unit
  10. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode, and remove the driver's door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(/acura/tl/iv-2008-2011/remont/exterior-body-panels/#door-system__front-door-panel-removalinstallation) )
  11. Disconnect the 37P connector from the door multiplex control unit
  12. Inspect the connector and socket terminals to be sure they are all making good contact If the terminals are bent, loose or corroded, repair them as necessary and recheck the system If the terminals look OK, go to step 13
  13. Reconnect the 37P connector to the door multiplex control unit, and do these input tests at the following connector If any test indicates a problem, find and correct the cause, then recheck the system If all the input tests prove OK, go to step 14 TEST CONDITION CAVITY CHART Cavity Wire Test condition Test Desired result Possible cause if desired result is not obtained 13 WHT Under all conditions Measure the voltage to ground There should be battery voltage Blown No 15 (10 A) fuse in the under-hood fuse/relay box Faulty driver's under-dash fuse/relay box An open in the wire 32 BLK In all ignition switch positions or all power modes Measure the voltage to ground There should be less than 0 2V Poor ground (G401) or open in ground wire An open or high resistance in the wire 37 BLK In all ignition switch positions or all power modes Measure the voltage to ground There should be less than 0 2V Poor ground (G402) or open in ground wire An open or high resistance in the wire 30 YEL Driver's door lock knob switch in LOCK Measure the voltage to ground There should be less than 0 2V Poor ground(G401) or open in ground wire Faulty driver's door lock knob switch An open or high resistance in the wire Driver's door lock knob switch in UNLOCK Measure the voltage to ground There should be battery voltage Faulty driver's door lock knob switch A short to ground in the wire 31 WHT Driver's door lock knob switch in UNLOCK Measure the voltage to ground There should be less than 0 2V Poor ground (G401) or open in ground wire Faulty driver's door lock knob switch An open or high resistance in the wire Driver's door lock knob switch in LOCK Measure the voltage to ground There should be battery voltage Faulty driver's door lock knob switch A short to ground in the wire
  14. If multiple failures are found on more than one control unit, replace the driver's under-dash fuse/relay box (includes the driver's MICU) (see «DRIVER'S UNDER-DASH FUSE/RELAY BOX (MICU) REMOVAL/INSTALLATION»(/acura/tl/iv-2008-2011/remont/body-electrical/#under-dash-fuserelay-box) ) If input failures are related to a particular control unit, replace the control unit

Scheme 25

Scheme 25: Ignition Key Switch Test
Scheme 25: Ignition Key Switch Test
  1. Remove the steering column upper and lower covers (see «STEERING COLUMN COVER REMOVAL/INSTALLATION»(/acura/tl/iv-2008-2011/remont/exteriorinterior-trim/#dashboard__steering-column-cover-removalinstallation) )
  2. Disconnect the 6P connector (A)
  3. Check for continuity between terminals No l and No 2 There should be continuity with the key in the ignition switch There should be no continuity with the key removed
  4. If the continuity is not as specified, replace the steering lock assembly (see «STEERING LOCK REPLACEMENT»(/acura/tl/iv-2008-2011/remont/electronic-steering/#power-steering-system) )

Scheme 26

Scheme 26: Ignition Key Light Test
Scheme 26: Ignition Key Light Test
  1. Remove the steering column upper and lower covers (see «STEERING COLUMN COVER REMOVAL/INSTALLATION»(/acura/tl/iv-2008-2011/remont/exteriorinterior-trim/#dashboard__steering-column-cover-removalinstallation) )
  2. Disconnect the 6P connector (A)
  3. The LED should come on when power is connected to terminal No 6 and ground is connected to terminal No 5
  4. If the LED does not come on, replace the steering lock assembly (see «STEERING LOCK REPLACEMENT»(/acura/tl/iv-2008-2011/remont/electronic-steering/#power-steering-system) )

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