Scheme 52
Scheme 53
Scheme 54
Scheme 55
Control Unit Input Test
Note. Before testing, troubleshoot the multiplex integrated control unit first, using B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ) Before testing, do the gauge control module self-diagnostic function (see SELF-DIAGNOSTIC FUNCTION ) to make sure the beeper and the indicators in the gauge control module work properly and the F-CAN line are OK Before doing the input tests, check the No 12 (7.5 A) fuse in the under-dash fuse/relay box
Driver's MICU
Scheme 56
Scheme 57
Scheme 58
- 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/tl/iv-2008-2011/remont/exteriorinterior-trim/#dashboard) )
- Disconnect driver's under-dash fuse/relay box connectors D, 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 are OK, go to step 5
- Reconnect the connectors, turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode, 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 Under all conditions 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 Under all conditions Measure the voltage to ground There should be less than 0 2V Poor ground(G402) An open or high resistance in the wire R2 BRN Under all conditions Measure the voltage to ground There should be less than 0 2V Poor ground(G401) An open or high resistance in the wire R5 BLK Under all conditions Measure the voltage to ground There should be less than 0 2 V Poor ground(G402) An open or high resistance 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 Faulty driver's door switch ground An open in the wire Driver's door closed Measure the voltage to ground The re should be at least 5 V Faulty driver's door switch A short to ground in the wire D4 LT GRN Left door open Measure the voltage to ground The re should be less than 0 2 V Faulty left rear door switch Faulty left rear door switch ground An open in the wire Left door closed Measure the voltage to ground The re should be at least 5 V Faulty left rear door switch A short to ground in the wire D5 WHT Trunk lid open (Remove the trunk light bulb) Measure the voltage to ground The re should be less than 0 2V Faulty trunk lid latch switch An open in the wire Poor ground(G603) Trunk lid closed (Remove the trunk light bulb) Measure the voltage to ground The re should be at least 5 V Faulty trunk lid latch switch A short to ground in the wire Q18 (1) RED Remote key inserted into the Remote slot Measure the voltage to ground There should be less than 0 2V Faulty Remote slot Faulty power control unit Poor ground An open in the wire Remote key removed from the Remote slot Measure the voltage to ground There should be at least 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 Poor ground(G403) Faulty ignition key switch An open in the wire Ignition switch in LOCK (0) position and ignition key removed from the ignition switch Measure the voltage to ground There should be at least 5 V Faulty ignition key switch A short to ground in the wire R6 R3 PNK BLK Combination light switch OFF Measure the voltage between terminals R6 and R3 There should be less than 0 2V Faulty combination light switch An open in the wire Combination light switch in any other position than OFF Measure the voltage between terminals R6 and R3 There should be at least 5 V Faulty combination light switch A short to ground in the wire R7 R3 GRY BLK Combination light switch (PARKING position) ON Measure the voltage between terminals R7 and R3 There should be less than 0 2V Faulty combination light switch An open in the wire Combination light switch OFF Measure the voltage between terminals R7 and R3 There should be at least 5 V Faulty combination light switch A short to ground in the wire R8 R3 BRN BLK Combination light switch (Headlight position) ON Measure the voltage between terminals R8 and R3 There should be less than 0 2V Faulty combination light switch An open in the wire Combination light switch OFF Measure the voltage between terminals R8 and R3 There should be at least 5 V Faulty combination light 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, and remove the passenger's side kick panel (see «TRIM REMOVAL/INSTALLATION - DOOR AREAS»(/acura/tl/iv-2008-2011/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-door-areas) )
- 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
- 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
- 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 in the wire A35 BRN Ignition switch ON (II), or power mode ON Measure the voltage to ground There should be battery voltage Faulty driver's under-dash fuse/relay box An open in the wire A36 BLK Under all conditions Measure the voltage to ground There should be less than 0 2V Poor ground(G405) An open or high resistance in the wire A37 BLK Under all conditions Measure the voltage to ground There should be less than 0 2V Poor ground(G401) An open or high resistance in the wire E15 BLK Under all conditions Measure the voltage to ground There should be less than 0 2V Poor ground(G201) An open or high resistance in the wire E16 BLK Under all conditions Measure the voltage to ground There should be less than 0 2V Poor ground(G203) 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 in the wire Front passenger's door closed Measure the voltage to ground There should be at least 5 V Faulty front passenger's door switch A short to ground 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 Faulty right rear door switch ground An open in the wire Right rear door closed Measure the voltage to ground There should be at least 5 V Faulty right rear door switch A short to ground in the wire (1) Without SH-AWD (2) With SH-AWD Gauge Control Module
- Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
- Remove the gauge control module (see «GAUGE CONTROL MODULE REPLACEMENT»(/acura/tl/iv-2008-2011/remont/gauges-instrument-panels/#display-and-gauge-system__gauge-control-module-replacement) ), and disconnect the 32P connector from it
- 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 are OK, go to step 13
- Reconnect the connector to the gauge control module, turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode, 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 16 WHT Under all conditions Measure the voltage to ground There should be battery voltage Blown No 15 (10A) fuse in the under-hood fuse/relay box Faulty driver's under-dash fuse/relay box An open in the wire 15 BRN Ignition switch ON (II), or power mode ON Measure the voltage to ground There should be battery voltage Faulty driver's under-dash fuse/relay box An open in the wire 17 BLK Under all conditions Measure the voltage to ground There should be less than 0 2V Poor ground (G401) An open or high resistance in the wire 20 LT GRN Parking brake lever pulled Measure the voltage to ground There should be less than 0 2V Faulty parking brake switch Faulty parking brake switch ground An open in the wire Parking brake lever released Measure the voltage to ground There should be at least 5 V Faulty parking brake switch A short to ground in the wire
- Do the Gauge Control Module Self-diagnostic Function (see «SELF-DIAGNOSTIC FUNCTION»(/acura/tl/iv-2008-2011/remont/gauges-instrument-panels/#display-and-gauge-system__self-diagnostic-function) ), and check the beeper and the seat belt reminder indicator If the beeper sounds and the seat belt reminder indicator flashes, go to step 15 If the beeper does not sound or the seat belt reminder indicator does not flash, replace the gauge control module (see «GAUGE CONTROL MODULE REPLACEMENT»(/acura/tl/iv-2008-2011/remont/gauges-instrument-panels/#display-and-gauge-system__gauge-control-module-replacement) )
- Substitute a known-good gauge control module, and recheck the system If the symptom is gone, the gauge control module is faulty, replace it (see «GAUGE CONTROL MODULE REPLACEMENT»(/acura/tl/iv-2008-2011/remont/gauges-instrument-panels/#display-and-gauge-system__gauge-control-module-replacement) ) If the symptom is still present, the driver's MICU is faulty, replace the driver's under-dash fuse/relay box (see «DRIVER'S UNDER-DASH FUSE/RELAY BOX (MICU) REMOVAL/INSTALLATION»(/acura/tl/iv-2008-2011/remont/body-electrical/#under-dash-fuserelay-box) )