Paddle Shifter + (Upshift Switch) Circuit Troubleshooting (10-Speed A/T) (2018 2019 2020)

SRS components are located in this area. Review the SRS component locations and the precautions and procedures before doing repair or service.

1. Problem verification

   -1. Connect the HDS to the DLC .

   -2. Turn the vehicle to the ON mode.

   -3. Check the parameter (s) below with the HDS when repeatedly pressing and releasing the paddle shifter + (upshift switch).

   Signal	Current conditions
   	Values	Unit
   Upshift Switch (ST)

   Is ON indicated when you are pressing the paddle shifter + (upshift switch) and OFF with the switch released?

   YES 

   Intermittent failure, the system is OK at this time.

   NO 

   The failure is duplicated. Go to step 2.

2. Determine possible failure area (TCM, others)

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

   -2. Disconnect the following connector.

   TCM connector A (23P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	TCM connector A (23P): disconnected
   Test point 1	TCM connector A (23P) No. 21
   Test point 2	Body ground

   Is there continuity when pressing the paddle shifter + (upshift switch) and no continuity when the paddle shifter + (upshift switch) is released?

   YES 

   Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good TCM , then recheck. If the symptom goes away and the TCM was substituted, replace the original TCM .

   NO 

   Go to step 3.

3. Determine possible failure area (paddle shifter + (upshift switch), others)

   -1. Remove the steering wheel .

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

   Test condition	Vehicle OFF (LOCK) mode
   	Cable reel connector C (20P): disconnected
   	TCM connector A (23P): disconnected
   Test point 1	Cable reel connector C (20P) (female terminals) No. 12:
   Test point 2	Cable reel connector C (20P) (female terminals) No. 18:

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity when pressing the paddle shifter + (upshift switch) and no continuity when the paddle shifter + (upshift switch) is released?

   YES 

   Go to step 5.

   NO 

   Go to step 4.

4. Paddle shifter + (upshift switch) operation check

   -1. Disconnect the following connector.

   Paddle shifter + (upshift switch) 4P connector

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

   Test condition	Vehicle OFF (LOCK) mode
   	Cable reel connector C (20P): disconnected
   	Paddle shifter + (upshift switch) 4P connector: disconnected
   	TCM connector A (23P): disconnected
   Test point 1	Paddle shifter + (upshift switch) 4P connector (male terminals) No. 1:
   Test point 2	Paddle shifter + (upshift switch) 4P connector (male terminals) No. 2:

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity when pressing the paddle shifter + (upshift switch) and no continuity when the paddle shifter + (upshift switch) is released?

   YES 

   The paddle shifter + (upshift switch) is OK. Replace the cable reel subharness .

   NO 

   Replace the paddle shifter + (upshift switch) .

5. Open wire check (GND line)

   -1. Remove the cable reel .

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

   Test condition	Vehicle OFF (LOCK) mode
   	Cable reel connector A (20P): disconnected
   	Cable reel connector C (20P): disconnected
   	TCM connector A (23P): disconnected
   Test point 1	Cable reel connector A (20P) (female terminals) No. 1:
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The GND wire is OK. Go to step 6.

   NO 

   Repair an open in the GND wire between the cable reel and ground (G501), or repair poor ground (G501).

6. Shorted wire check (PADDLE SW UP line)

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

   Test condition	Vehicle OFF (LOCK) mode
   	Cable reel connector A (20P): disconnected
   	Cable reel connector C (20P): disconnected
   	TCM connector A (23P): disconnected
   Test point 1	Cable reel connector A (20P) (female terminals) No. 6:
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   Repair a short to ground in the PADDLE SW UP wire between the cable reel and the TCM.

   NO 

   The PADDLE SW UP wire is not shorted. Go to step 7.

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

   -1. Reconnect TCM connector A (23P).

   -2. Turn the vehicle to the ON mode.

   -3. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   	Cable reel connector A (20P): disconnected
   	Cable reel connector C (20P): disconnected
   Test point 1	Cable reel connector A (20P) (female terminals) No. 1:
   Test point 2	Cable reel connector A (20P) (female terminals) No. 6:

   Courtesy of HONDA, U.S.A., INC.

   Is there battery voltage?

   YES 

   Replace the cable reel .

   NO 

   Go to step 8.

8. Open wire check (SUPP line)

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

   -2. Disconnect the following connector.

   TCM connector A (23P)

   -3. Connect terminals A and B with a jumper wire.

   Terminal A	Cable reel connector A (20P) (female terminals) No. 6:
   Terminal B	Body ground

   Courtesy of HONDA, U.S.A., INC.

   -4. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Cable reel connector A (20P): disconnected
   	Cable reel connector C (20P): disconnected
   	TCM connector A (23P): disconnected
   	Cable reel connector A (20P) No. 6: jumped to body ground
   Test point 1	TCM connector A (23P) No. 21
   Test point 2	Body ground

   Is there continuity?

   YES 

   The SUPP wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good TCM , then recheck. If the symptom goes away and the TCM was substituted, replace the original TCM .

   NO 

   Repair an open in the SUPP wire between the cable reel and the TCM.