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Reminder Systems Acura TL III

Gauges & Instrument Panels 4 illustrations ~678 words

Scheme 43

Scheme 43: Circuit Diagram
Scheme 43: Circuit Diagram

Scheme 44

Scheme 44: Control Unit Input Test
Scheme 44: Control Unit Input Test

Scheme 45

Scheme 45
Scheme 45

Scheme 46

Scheme 46
Scheme 46
  1. Before testing, troubleshoot the multiplex integrated control system using B-CAN System Diagnosis Test Mode A (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A»(/acura/tl/iii-2003-2006/remont/communication-devices/#multiplex-intergrated-control-system__troubleshooting-b-can-system-diagnosis-test) ). Multiplex Integrated Control Unit
  2. Turn the ignition switch OFF.
  3. Remove the left kick panel (see «TRIM REMOVAL/INSTALLATION - DOOR AREAS»(/acura/tl/iii-2003-2006/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-door-areas) ).
  4. Disconnect the under-dash fuse/relay box connectors F, H and P. NOTE: All connectors are wire side of female terminals.
  5. 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 6.
  6. Reconnect the connectors. Turn the ignition switch ON (II) and make these input tests at the 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 7. CONTROL UNIT INPUT TEST Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained F14 BLU/RED Ignition switch ON (II), driver's seat belt is unbuckled. Check for voltage to ground: There should be less than 1 V. Faulty driver's seat belt switch Poor ground (G503, G601) An open in the wire H14 BLU/RED Ignition switch ON (II), driver's seat belt is buckled. Check for voltage to ground: There should be 5 V or more. Faulty driver's seat belt switch Short to ground P13 RED/WHT Ignition key in the ignition switch. Check for voltage to ground: There should be less than 1 V. Faulty ignition key switch Poor ground (G501) An open in the wire Ignition key out of the ignition switch. Check for voltage to ground: There should be 5 V or more. Faulty ignition key switch Short to ground
  7. Turn the ignition switch OFF.
  8. Remove the gauge control module (see «GAUGE CONTROL MODULE REPLACEMENT»(/acura/tl/iii-2003-2006/remont/gauges-instrument-panels/#display-and-gauge-system) ).
  9. Disconnect the gauge control module connectors A and B. NOTE: All connectors are wire side of female terminals.
  10. 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 11.
  11. With the connectors still disconnected, make these input tests at the connector. If any test indicates a problem, find and correct the cause, then recheck the system. If the input tests prove OK, go to step 12. CONTROL UNIT INPUT TEST Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained A8 YEL/RED Engine OFF Check for continuity to ground: There should be continuity. Faulty engine oil pressure switch An open in the wire Engine running Check for continuity to ground: There should be no continuity. Mechanical problem in the engine Faulty engine oil pressure switch A short to ground in the wire
  12. Reconnect the connectors, and make these input tests at gauge control module connector B. If any test indicates a problem, find and correct the cause, then recheck the system. If the input tests prove OK, go to step 13. GAUGE CONTROL MODULE CONNECTOR B Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained B1 B10 BLK Under all conditions Check for voltage to ground: There should be less than 1 V. Poor ground (G501) An open in the wire
  13. Perform the Gauge Self-diagnostic Procedure (see «SELF-DIAGNOSTIC FUNCTION»(/acura/tl/iii-2003-2006/remont/gauges-instrument-panels/#display-and-gauge-system__self-diagnostic-function) ). If the beeper sounds and the seat belt reminder light flashes, go to step 14. If the beeper does not sound or the seat belt reminder light does not flash, replace the gauge control module.
  14. Substitute a known-good gauge control module and recheck the system. If the symptom is gone, the gauge control module is faulty; replace it. If the symptom is still present, the multiplex integrated control unit (MICU) is faulty; replace the under-dash fuse/relay box.

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