Entry Lights Control System — Acura ZDX I (2009-2013)

Scheme 20

Scheme 20: Component Location Index

Scheme 21

Scheme 22

Scheme 22: Circuit Diagram

Scheme 23

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 24

Scheme 24: Control Unit Input Test

Scheme 25

Scheme 26

Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
Remove the driver's dashboard undercover (see «DRIVER'S DASHBOARD UNDERCOVER REMOVAL/INSTALLATION»(/acura/zdx/i-2009-2013/remont/gauges-instrument-panels/#dashboard) ).
Disconnect driver's under-dash fuse/relay box connectors D, P, Q, and R. NOTE: All connector views are wire side of female terminals.
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.
Reconnect the connectors to the driver's under-dash fuse/relay box, and do the following input tests: 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. Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained P9 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 An open or high resistance in the wire P4 PNK Interior light switch in the DOOR position Connect 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 front and/or rear individual map lights An open or high resistance in the wire Q11 (1) ORN Under all conditions Connect 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 Connect 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 Q1 BRN In all ignition switch positions or all power modes Measure the voltage to ground: There should be less than 0.2 V. Poor ground (G401) An open or high resistance in the ground wire Q2 BLK In all ignition switch positions or all power modes Measure the voltage to ground: There should be less than 0.2 V. Poor ground (G402) An open or high resistance in the ground wire R2 BLK In all ignition switch positions or all power modes Measure the voltage to ground: There should be less than 0.2 V. Poor ground (G402) An open or high resistance in the ground wire R5 ORN In all ignition switch positions or all power modes Measure the voltage to ground: There should be less than 0.2 V. Poor ground (G401) An open or high resistance in the ground wire D4 LT GRN Left rear door open Measure the voltage to ground: There should be less than 0.2 V. Faulty left rear door switch Faulty left rear door switch ground An open or high resistance 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 0.2 V. Faulty driver's door switch Faulty driver's door switch ground An open or high resistance 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 Q18 (1) PNK Remote key inserted into the remote slot Measure the voltage to ground: There should be less than 0.2 V. Faulty remote slot Faulty power control unit Poor ground (G401) or an open in the ground wire An open or high resistance in the wire Remote key removed from the remote 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) PNK Ignition key inserted into the ignition switch Measure the voltage to ground: There should be less than 0.2 V. Faulty ignition key switch Poor ground (G401) or an open in the ground wire An open or high resistance in the 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 (2) Without keyless access Passenger's MICU
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
Remove the right kick panel (see «TRIM REMOVAL/INSTALLATION - DOOR AREAS»(/acura/zdx/i-2009-2013/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-door-areas) ).
Disconnect passenger's under-dash fuse/relay box connectors A, E, and H. NOTE: All connector views are wire side of female terminals.
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 10.
Reconnect the connectors to the passenger's under-dash fuse/relay box, and do the following input tests: 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 11. 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 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 0.2 V. Poor ground (G405) An open or high resistance in the ground wire A37 BRN In all ignition switch positions or all power modes Measure the voltage to ground: There should be less than 0.2 V. Poor ground(G402) An open or high resistance in the ground wire E15 BLK In all ignition switch positions or all power modes Measure the voltage to ground: There should be less than 0.2 V. Poor ground(G203) An open or high resistance in the ground wire E16 BLK In all ignition switch positions or all power modes Measure the voltage to ground: There should be less than 0.2 V. Poor ground(G203) An open or high resistance in the ground wire H25 ORN Right rear door open Measure the voltage to ground: There should be less than 0.2 V. Faulty right rear door switch Faulty right rear door switch ground An open or high resistance in the wire Right rear door closed Measure the voltage to ground: There should be about 5 V. Faulty right rear door switch A short to ground in the wire H3 LT BLU Front passenger's door open Measure the voltage to ground: There should be less than 0.2 V. 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 Door Multiplex Control Unit
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
Remove the driver's door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(/acura/zdx/i-2009-2013/remont/exterior-body-panels/#doors__front-door-panel-removalinstallation) ).
Disconnect the 37P connector from the power window master switch.
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 15.
Reconnect the driver's door harness to driver's door subharness.
Reconnect the 37P connector to the power window master switch, and do the following input tests: 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 17. 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 An open or high resistance in the wire 32 BLK In all ignition switch positions or all power modes Measure the voltage to ground: There should be less than 0.2 V. Poor ground (G402) An open or high resistance in the ground wire 37 BLK In all ignition switch positions or all power modes Measure the voltage to ground: There should be less than 0.2 V. Poor ground (G401) An open or high resistance in the ground wire 30 YEL Driver's door lock knob switch in LOCK Measure the voltage to ground: There should be less than 0.2 V. Faulty driver's door lock knob switch Poor ground (G402) or an open in the ground wire 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 0.2 V. Faulty driver's door lock knob switch Poor ground (G402) or an open in the ground wire 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
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 AND INSTALLATION»(/acura/zdx/i-2009-2013/remont/fuses-circuit-breakers/#under-dash-fuserelay-box) ). If input failures are related to a particular control unit, replace the control unit.

Ignition Key Switch Test

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

Scheme 27

Scheme 27: Ignition Key Switch Test

Scheme 28

Remove the steering column upper and lower covers (see «COLUMN COVER REMOVAL/INSTALLATION»(/acura/zdx/i-2009-2013/remont/gauges-instrument-panels/#dashboard__column-cover-removalinstallation) ).
Disconnect the 6P connector (A).
Check for continuity between the terminals in each switch position according to the table.
If the continuity is not as specified, the ignition key switch is faulty; replace the steering lock (see «STEERING LOCK REPLACEMENT»(/acura/zdx/i-2009-2013/remont/manual-power-steering/#power-steering-system) ).

Ignition Key Light Test

Scheme 29

Scheme 29: Ignition Key Light Test

Remove the steering column upper and lower covers (see «COLUMN COVER REMOVAL/INSTALLATION»(/acura/zdx/i-2009-2013/remont/gauges-instrument-panels/#dashboard__column-cover-removalinstallation) ).
Disconnect the 6P connector (A).
The LED should come on when power is connected to terminal No. 6 and ground is connected to terminal No. 5.
If the LED does not come on, the ignition key light is faulty; replace the steering lock (see «STEERING LOCK REPLACEMENT»(/acura/zdx/i-2009-2013/remont/manual-power-steering/#power-steering-system) ).

Scheme 30

Scheme 30: Remote Slot Light Test

Remove the driver's inner dashboard trim (see «DRIVER'S OUTER DASHBOARD TRIM REMOVAL/INSTALLATION»(/acura/zdx/i-2009-2013/remont/gauges-instrument-panels/#dashboard) ).
Disconnect the 16P connector (A) from the remote slot (B).
The LED should come on when power is connected to terminal No. 1 and ground is connected to terminal No. 10.
If the LED does not come on, the remote slot light is faulty; replace the remote slot control unit (see «ENGINE START/STOP SWITCH TEST/REPLACEMENT»(/acura/zdx/i-2009-2013/remont/door-locks-anti-theft-systems/#keyless-access-system) ).

Entry Lights Control System Acura ZDX I