Paddle Shifter - (Downshift Switch) Circuit Troubleshooting (CVT)

Paddle Shifter - (Downshift Switch) Circuit Troubleshooting 

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. Make sure the HDS communicates with the vehicle. If it does not, go to the DLC circuit troubleshooting .

   -4. Check the parameter (s) below with the HDS when repeatedly pressing and releasing the paddle shifter - (downshift switch).

   Signal	Current conditions
   	Values	Unit
   Downshift Switch (ST)

   Is ON indicated when you are pressing the paddle shifter - (downshift 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 (PCM, others)

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

   -2. Jump the SCS line with the HDS.

   -3. Disconnect the following connector.

   PCM connector A (51P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	PCM connector A (51P): disconnected
   Test point 1	PCM connector A (51P) No. 19
   Test point 2	Body ground

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

   YES 

   Update the PCM if it does not have the latest software , or substitute a known-good PCM , then recheck. If the symptom goes away and the PCM was updated, troubleshooting is complete. If the symptom goes away and the PCM was substituted, replace the original PCM .

   NO 

   Go to step 3.

3. Determine possible failure area (paddle shifter - (downshift 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
   	PCM connector A (51P): disconnected
   Test point 1	Cable reel connector C (20P) No. 4
   Test point 2	Cable reel connector C (20P) No. 12

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

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

   YES 

   Go to step 5.

   NO 

   Go to step 4.

4. Paddle shifter - (downshift switch) operation check

   -1. Disconnect the following connector.

   Paddle shifter - (downshift switch) 2P 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 - (downshift switch) 2P connector: disconnected
   	PCM connector A (51P): disconnected
   Test point 1	Paddle shifter - (downshift switch) 2P connector No. 1
   Test point 2	Paddle shifter - (downshift switch) 2P connector No. 2

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

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

   YES 

   The paddle shifter - (downshift switch) is OK. Replace the cable reel subharness .

   NO 

   Replace the paddle shifter - (downshift 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
   	PCM connector A (51P): disconnected
   Test point 1	Cable reel connector A (20P) 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 (G401), or repair poor ground (G401).

6. Shorted wire check (PADDLE SW DOWN 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
   	PCM connector A (51P): disconnected
   Test point 1	Cable reel connector A (20P) No. 17
   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 DOWN wire between the cable reel and the PCM.

   NO 

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

7. Open wire check (PADDLE SW DOWN line)

   -1. Connect terminals A and B with a jumper wire.

   Terminal A	Cable reel connector A (20P) No. 17
   Terminal B	Body ground

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

   -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
   	PCM connector A (51P): disconnected
   	Cable reel connector A (20P) No. 17: jumped to body ground
   Test point 1	PCM connector A (51P) No. 19

   Test point 2

   Body ground

   Is there continuity?

   YES 

   The PADDLE SW DOWN wire is OK. Replace the cable reel .

   NO 

   Repair an open in the PADDLE SW DOWN wire between the cable reel and the PCM.