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Reminder Systems Acura RL II

Gauges & Instrument Panels 3 illustrations ~805 words

Scheme 30

Scheme 30: Circuit Diagram
Scheme 30: Circuit Diagram

Control Unit Input Test

Note. 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 ).

Multiplex Integrated Control Unit

Scheme 31

Scheme 31: Control Unit Input Test
Scheme 31: Control Unit Input Test

Scheme 32

Scheme 32
Scheme 32
  1. Turn the ignition switch OFF.
  2. Remove the left kick panel (see «TRIM REMOVAL/INSTALLATION - DOOR AREAS»(/acura/rl/ii-2004-2008/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-door-areas) ).
  3. Disconnect the driver's under-dash fuse/relay box connectors. NOTE: All connectors 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 are OK, go to step 5.
  5. With the connectors still disconnected, make these input tests at the 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. WIRE CAVITY REFERENCE CHART Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained H14 ORN Under all conditions Attach to ground: The ignition key light should come on. Blown No. 7 (10A) fuse in the driver's under-dash fuse/relay box Faulty ignition key light An open in the wire
  6. Reconnect the connectors to the driver's under-dash fuse/relay box, and make these input tests at the 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 7. WIRE CAVITY REFERENCE CHART Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained E9-H9 BLK Under all conditions Measure the voltage to ground: There should be less than 0.5 V. Poor ground (G601) An open in the wire P1 BRN Poor ground (G502) An open in the wire Q1 YEL Ignition switch ON (II), driver's seat belt is buckled. Measure the voltage to ground: There should be 5 V or more. Poor ground (G601) Faulty driver's seat belt buckle switch An open in the wire Ignition switch ON (II), driver's seat belt is unbuckled. Measure the voltage to ground: There should be less than 1 V. Faulty driver's seat belt buckle switch A short to ground in the wire Gauge Control Module
  7. Turn the ignition switch OFF.
  8. Remove the gauge control module (see «GAUGE CONTROL MODULE REPLACEMENT»(/acura/rl/ii-2004-2008/remont/gauges-instrument-panels/#gauges__gauge-control-module-replacement) ).
  9. Disconnect gauge control module connectors A (20P) and B (28P).
  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 look OK, go to step 11.
  11. Reconnect the connectors to the gauge control module, and make these input tests at the 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 12. WIRE CAVITY REFERENCE CHART Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained A7 BLK Under all conditions Measure the voltage to ground: There should be less than 0.5 V. Poor ground(G501) An open in the wire A8 BLK Poor ground(G501) An open in the wire B1 PNK Ignition switch ON (II) Measure the voltage to ground: There should be battery voltage. Blown No. 21 (10 A) fuse in the driver's under-dash fuse/relay box An open in the wire B2 WHT Under all conditions Measure the voltage to ground: There should be battery voltage. Blown No. 15 (40 A) fuse in the under-hood fuse/relay box Blown No. 7 (10 A) fuse in the driver's under-dash fuse/relay box An open in the wire B27 LT GRN Ignition switch ON (II) Measure the voltage to ground: There should be less than 1 V. Faulty oil pressure switch An open in the wire Engine running Measure the voltage to ground: There should be 5 V or more. Faulty oil pressure switch A short to ground in the wire
  12. Do the gauge self-diagnostic procedure (see «SELF-DIAGNOSTIC FUNCTION»(/acura/rl/ii-2004-2008/remont/gauges-instrument-panels/#gauges__self-diagnostic-function) ). If the beeper sounds and the seat belt reminder light flashes, go to step 13. If the beeper does not sound or the seat belt reminder light does not flash, replace the gauge control module (see «GAUGE CONTROL MODULE REPLACEMENT»(/acura/rl/ii-2004-2008/remont/gauges-instrument-panels/#gauges__gauge-control-module-replacement) ).
  13. 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/rl/ii-2004-2008/remont/gauges-instrument-panels/#gauges__gauge-control-module-replacement) ). If the symptom is still present, the multiplex integrated control unit (MICU) is faulty; replace the under-dash fuse/relay box (see «DRIVER'S UNDER-DASH FUSE/RELAY BOX (MICU) REMOVAL/INSTALLATION»(/acura/rl/ii-2004-2008/remont/body-electrical/#under-dash-fuserelay-box) ).

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