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Home >> Acura >> 2014 >> MDX SH-AWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle - Service, Testing And Troubleshooting (Except Hybrid) >> Troubleshooting >> Paddle Shifter - (Downshift Switch) Illumination Circuit Troubleshooting (2014 2015)

Paddle Shifter - (Downshift Switch) Illumination Circuit Troubleshooting (2014 2015)

Paddle Shifter - (Downshift Switch) Illumination Circuit Troubleshooting 

SRS components are located in this area. Review the SRS component locations - Refer to: SRS Component Location Index and the precautions and procedures before doing repair or service.

NOTE:
  • Troubleshoot any fuel and emissions DTCs first.
  • If all illuminations of switches on the steering wheel do not come on simultaneously, check for a blown No. C10 (10 A) fuse in the under-hood fuse/relay box. Replace the No. C10 (10 A) fuse if it is blown, and recheck. If the fuse blows again, repair a short to body ground in the No. C10 (10 A) fuse circuit.
  1. Determine possible failure area (paddle shifter - (downshift switch), others)

    -1. Remove the driver's airbag.

    - 2. Disconnect the following connector.

    Paddle shifter - (downshift switch) 4P connector - Refer to: Paddle Shifter Removal and Installation (2014 2015), or Paddle Shifter Removal and Installation (2016)

    - 3. Turn the vehicle to the ON mode.

    - 4. Turn the combination light switch to the PARKING (SMALL) position.

    - 5. Measure the voltage between test points 1 and 2.

    Test condition Vehicle ON mode
      Combination light switch PARKING (SMALL) position
      Paddle shifter - (downshift switch) 4P connector: disconnected
    Test circuit L STRG ILL-, L STRG ILL+
    Test point 1 Paddle shifter - (downshift switch) 4P connector No. 3 (YEL)
    Test point 2 Paddle shifter - (downshift switch) 4P connector No. 4 (GRN)
    GHH315980Courtesy of HONDA, U.S.A., INC.

    Is there battery voltage?

    YES 

    Replace the paddle shifter - (downshift switch) - Refer to: Paddle Shifter Removal and Installation (2016), or Paddle Shifter Removal and Installation (2014 2015) .

    NO 

    Go to step 2.

  2. Determine possible failure area (L STRG ILL+ line, others)

    -1. Turn the vehicle to the OFF (LOCK) mode.

    - 2. Disconnect the following connector.

    Audio remote/HFL-navigation voice control switch connector (16P)

    - 3. Turn the vehicle to the ON mode.

    - 4. Measure the voltage between test points 1 and 2.

    Test condition Vehicle ON mode
      Combination light switch PARKING (SMALL) position
      Paddle shifter - (downshift switch) 4P connector: disconnected
      Audio remote/HFL-navigation voice control switch connector (16P): disconnected
    Test circuit SGND, +B BACK UP
    Test point 1 Audio remote/HFL-navigation voice control switch connector (16P) No. 1 (BLK)
    Test point 2 Audio remote/HFL-navigation voice control switch connector (16P) No. 16 (GRN)
    GHH315981Courtesy of HONDA, U.S.A., INC.

    Is there battery voltage?

    YES 

    Go to step 3.

    NO 

    Go to step 7.

  3. Shorted wire check (L STRG ILL+ line)

    -1. Turn the combination light switch to the OFF position.

    - 2. Turn the vehicle to the OFF (LOCK) mode.

    - 3. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
      Paddle shifter - (downshift switch) 4P connector: disconnected
      Audio remote/HFL-navigation voice control switch connector (16P): disconnected
    Test circuit L STRG ILL+
    Test point 1 Paddle shifter - (downshift switch) 4P connector No. 4 (GRN)
    Test point 2 Body ground
    GHH315982Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    Repair a short to ground in the L STRG ILL+ wire between the paddle shifter - (downshift switch) and the audio remote/HFL-navigation voice control switch connector (16P), or replace the cable reel subharness - Refer to: Steering Wheel Disassembly and Reassembly (2014 2015), or Steering Wheel Disassembly and Reassembly (2016 2017 2018 2019 2020) .

    NO 

    Go to step 4.

  4. Open wire check (L STRG ILL+ line)

    -1. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
      Paddle shifter - (downshift switch) 4P connector: disconnected
      Audio remote/HFL-navigation voice control switch connector (16P): disconnected
    Test circuit L STRG ILL+
    Test point 1 Paddle shifter - (downshift switch) 4P connector No. 4 (GRN)
    Test point 2 Audio remote/HFL-navigation voice control switch connector (16P) No. 3 (GRN)
    GHH315983Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The L STRG ILL+ wire is OK. Go to step 5.

    NO 

    Repair an open in the L STRG ILL+ wire between the paddle shifter - (downshift switch) and the audio remote/HFL-navigation voice control switch connector (16P), or replace the cable reel subharness - Refer to: Steering Wheel Disassembly and Reassembly (2014 2015), or Steering Wheel Disassembly and Reassembly (2016 2017 2018 2019 2020) .

  5. Open wire check (L STRG ILL- line)

    -1. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
      Paddle shifter - (downshift switch) 4P connector: disconnected
      Audio remote/HFL-navigation voice control switch connector (16P): disconnected
    Test circuit L STRG ILL-
    Test point 1 Paddle shifter - (downshift switch) 4P connector No. 3 (YEL)
    Test point 2 Audio remote/HFL-navigation voice control switch connector (16P) No. 5 (YEL)
    GHH315984Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    L STRG ILL- wire is OK. Go to step 6.

    NO 

    Repair an open in the L STRG ILL-(LED) wire between the paddle shifter - (downshift switch) and the audio remote/HFL-navigation voice control switch connector (16P), or replace the cable reel subharness - Refer to: Steering Wheel Disassembly and Reassembly (2014 2015), or Steering Wheel Disassembly and Reassembly (2016 2017 2018 2019 2020) .

  6. Open wire check (LIN (METER) line)

    -1. Disconnect the following connector.

      Cable reel connector D (20P)

    - 2. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
      Paddle shifter - (downshift switch) 4P connector: disconnected
      Audio remote/HFL-navigation voice control switch connector (16P): disconnected
      Cable reel connector D (20P): disconnected
    Test circuit LIN (METER)
    Test point 1 Audio remote/HFL-navigation voice control switch connector (16P) No. 14 (BLU)
    Test point 2 Cable reel connector D (20P) No. 19 (BLU)
    GHH315985Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    Replace the audio remote/HFL-navigation voice control switch.

    NO 

    Repair an open in the LIN wire between the audio remote/HFL-navigation voice control switch connector (16P) and the cable reel connector D (20P), or replace the cable reel subharness - Refer to: Steering Wheel Disassembly and Reassembly (2016 2017 2018 2019 2020), or Steering Wheel Disassembly and Reassembly (2014 2015) .

  7. Open wire check (+B line)

    -1. Turn the vehicle to the OFF (LOCK) mode.

    - 2. Disconnect the following connector.

      Cable reel connector D (20P)

    - 3. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
      Paddle shifter - (downshift switch) 4P connector: disconnected
      Audio remote/HFL-navigation voice control switch connector (16P): disconnected
      Cable reel connector D (20P): disconnected
    Test circuit +B BACK UP
    Test point 1 Audio remote/HFL-navigation voice control switch connector (16P) No. 16 (GRN)
    Test point 2 Cable reel connector D (20P) No. 14 (GRN)
    GHH315986Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The +B wire is OK. Go to step 8.

    NO 

    Repair an open in the +B wire between the audio remote/HFL-navigation voice control switch connector (16P) and cable reel connector D (20P), or replace the cable reel subharness - Refer to: Steering Wheel Disassembly and Reassembly (2014 2015), or Steering Wheel Disassembly and Reassembly (2016 2017 2018 2019 2020) .

  8. Open wire check (SGND line)

    -1. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
      Paddle shifter - (downshift switch) 4P connector: disconnected
      Audio remote/HFL-navigation voice control switch connector (16P): disconnected
      Cable reel connector D (20P): disconnected
    Test circuit SGND
    Test point 1 Audio remote/HFL-navigation voice control switch connector (16P) No. 1 (BLK)
    Test point 2 Cable reel connector D (20P) No. 11 (BLK)
    GHH315987Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    Go to step 10.

    NO 

    Go to step 9.

  9. Cruise control combination switch check

    -1. Disconnect the following connector.

    Cruise control combination switch connector (16P)

    - 2. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
      Paddle shifter - (downshift switch) 4P connector: disconnected
      Audio remote/HFL-navigation voice control switch connector (16P): disconnected
      Cable reel connector D (20P): disconnected
      Cruise control combination switch connector (16P) disconnect
    Test circuit SGND
    Test point 1 Cruise control combination switch 16P connector No. 1 (BLK)
    Test point 2 Cruise control combination switch 16P connector No. 3 (BLK)
    GHH315988Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    Repair an open in the SGND wire between the audio remote switch and cable reel connector D (20P), or replace the cable reel subharness - Refer to: Steering Wheel Disassembly and Reassembly (2014 2015), or Steering Wheel Disassembly and Reassembly (2016 2017 2018 2019 2020) .

    NO 

    Replace the cruise control combination switch .

  10. Determine possible failure area (cable reel, others)

    -1. Remove the cable reel.

    - 2. Turn the vehicle to the ON mode.

    - 3. Turn the combination light switch to the PARKING (SMALL) position.

    - 4. Measure the voltage between test points 1 and 2.

    Test condition Vehicle ON mode
      Paddle shifter - (downshift switch) 4P connector: disconnected
      Audio remote/HFL-navigation voice control switch connector (16P): disconnected
      Cable reel connector A (20P): disconnected
      Cable reel connector D (20P): disconnected
       
    Test circuit SGND, +B BACK UP
    Test point 1 Cable reel connector A (20P) No. 1 (BRN)
    Test point 2 Cable reel connector A (20P) No. 2 (GRN)
    GHH315989Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    Replace the cable reel .

    NO 

    Go to step 11.

  11. Open wire check (SGND line)

    -1. Turn the vehicle to the OFF (LOCK) mode.

    - 2. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
      Paddle shifter - (downshift switch) 4P connector: disconnected
      Audio remote/HFL-navigation voice control switch connector (16P): disconnected
      Cable reel connector A (20P): disconnected
      Cable reel connector D (20P): disconnected
    Test circuit SGND
    Test point 1 Cable reel connector A (20P) No. 1 (BRN)
    Test point 2 Body ground
    GHH315990Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The SGND wire is OK. Repair an open in the +B BACK UP wire between cable reel connector A (20P) and the under - hood fuse/relay box.

    NO 

    Repair an open in the SGND wire between cable reel connector A (20P) and ground (G507), or repair poor ground (G507).

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