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Home >> Honda >> 2005 >> Odyssey EX >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Collision/Avoidance >> Parking And Back-Up Sensor System >> Control Unit Input Test
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Control Unit Input Test

  1. Remove the driver's dashboard lower cover (see DRIVER'S LOWER DASHBOARD SWITCH PANEL REMOVAL/INSTALLATION ).
  2. Disconnect the 22P connector (A) from the parking/back-up sensor control unit (B).
    Fig 1: Disconnecting 22P Connector From Parking/Back-Up Sensor Control Unit
    G03707175Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. 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 4.
  4. With the connector still disconnected, and the parking/back-up sensor switch turned ON, make the input tests shown in CONTROL UNIT TEST INPUT DETAILS  , 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, control unit must be faulty; replace it.
    CONTROL UNIT TEST INPUT DETAILS

    Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained
    17 YEL/RED Ignition switch ON (II) Attach to ground:
    The corner parking sensor indicator should come on.
    • Blown No. 21 (7.5 A) fuse in the driver's under-dash fuse/relay box
    • Faulty gauge control module
    • An open in the wire
    15 RED/BLU
    16 BLK/ORN
    14 GRN/ORN
    5 BLU/YEL Ignition switch ON (II) Attach to ground:
    The back-up sensor indicator should come on.
    6 BRN/YEL Ignition switch ON (II) and parking/back-up sensor switch ON Check for voltage to ground:
    There should be battery voltage.
    • Blown No. 21 (7.5 A) fuse in the driver's under-dash fuse/relay box
    • Faulty gauge control module
    • An open in the wire
    19 GRY Ignition switch ON (II) and parking/back-up sensor switch ON Check for voltage to ground:
    There should be battery voltage.
    21 BLU/BLK Ignition switch ON (II), shift lever in P position Check for voltage to ground:
    There should be less than 1 V.
    • An open in the wire
    • Faulty transmission range switch
    • Poor ground (G101, G102)
    22 BLU/WHT Under all conditions Check for continuity between the No. 22 terminal and PCM connector A (44P) No. 29 terminal:
    There should be continuity.    		 An open in the wire
    Check for continuity between the No. 22 terminal and body ground:
    There should be no continuity.    		 A short in the wire
    1 BLK/WHT Under all conditions Check for continuity between the No. 1 terminal and right rear corner parking sensor No. 1 terminal:
    There should be continuity.    		 An open in the wire
    Check for continuity between the No. 1 terminal and body ground:
    There should be no continuity.    		 A short in the wire
    2 GRY/BLU Under all conditions Check for continuity between the No. 2 terminal and left rear corner parking sensor No. 1 terminal:
    There should be continuity.    		 An open in the wire
    Check for continuity between the No. 2 terminal and body ground:
    There should be no continuity.    		 A short in the wire
    3 RED/YEL Under all conditions Check for continuity between the No. 3 terminal and right back-up sensor No. 1 terminal:
    There should be continuity.    		 An open in the wire
    Check for continuity between the No. 3 terminal and body ground:
    There should be no continuity.    		 A short in the wire
    4 BRN/WHT Under all conditions Check for continuity between the No. 4 terminal and each corner parking sensor No. 1 (or No. 2 (1) ) terminal:
    There should be continuity.    		 An open in the wire
    Check for continuity between the No. 4 terminal and body ground:
    There should be no continuity.    		 A short in the wire
    10 GRN/RED Under all conditions Check for continuity between the No. 10 terminal and right front corner parking sensor No. 2 terminal:
    There should be continuity.    		 An open in the wire
    Check for continuity between the No. 10 terminal and body ground:
    There should be no continuity.    		 A short in the wire
    11 WHT/BLU Under all conditions Check for continuity between the No. 11 terminal and left front corner parking sensor No. 2 terminal:
    There should be continuity.    		 An open in the wire
    Check for continuity between the No. 11 terminal and body ground:
    There should be no continuity.    		 A short in the wire
    12 RED/WHT Under all conditions Check for continuity between the No. 12 terminal and left back-up sensor No. 1 terminal:
    There should be continuity.    		 An open in the wire
    Check for continuity between the No. 12 terminal and body ground:
    There should be no continuity.    		 A short in the wire
    13 BLK/RED Under all conditions Check for continuity between the No. 13 terminal and each back-up sensor No. 2 terminal:
    There should be continuity.    		 An open in the wire
    Check for continuity between the No. 13 terminal and body ground:
    There should be no continuity.    		 A short in the wire
    (1) Rear corner sensors
  5. Reconnect the 22P connector to the parking/back-up sensor control unit, and make the input tests shown in CONTROL UNIT TEST INPUT DETAILS  , 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, control unit must be faulty; replace it.
    CONTROL UNIT TEST INPUT DETAILS

    Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained
    20 BLK Ignition ON (II) Check for voltage to ground:
    There should less than 1 V.
    • Poor ground (G502)
    • An open in the wire
    9 GRN Ignition switch ON (II), shift lever in R position Check for voltage to ground:
    There should be battery voltage.
    • Blown No. 21 (7.5 A) fuse in the driver's under-dash fuse/relay box
    • Faulty MICU
    • An open in the wire
    7 LT BLU Ignition switch ON (II) and parking/back-up sensor switch ON Check for voltage to ground:
    There should be battery voltage.
    • Blown No. 21 (7.5 A) fuse in the driver's under-dash fuse/relay box
    • Faulty switch
    • An open in the wire
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