Paddle Shifter - (Downshift Switch) Circuit Troubleshooting
Paddle Shifter - (Downshift Switch) Circuit Troubleshooting
SRS components are located in this area. Review the SRS component locations as follows: 4-door model, 2-door model, and review the precautions and procedures, before doing repair or service.

1.
Problem verification:

Problem verification
?1.
Connect the HDS to the DLC (A) located under the driver's side of the dashboard.


?2.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?3.
Make sure the HDS communicates with the PCM. 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 or OFF indicated when you are operating the paddle shifter - (downshift switch)?

     
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):

Determine possible failure area (PCM, others)
?1.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?2.
Jump the SCS line with the HDS.


?3.
Disconnect the following connector.

?4.
Check for continuity between test points 1 and 2.
Test condition
Ignition switch LOCK (0), or OFF mode
 
PCM connector A (51P): disconnected
Test circuit
PADDLE SW DOWN
Test point 1
PCM connector A (51P) No. 20 (RED)
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
     
     
     
     
NO
     
     
     
Go to step 3.
3.
Determine possible failure area (paddle shifter - (downshift switch), others):

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
Ignition switch LOCK (0), or OFF mode
 
Cable reel connector C (20P): disconnected
Test circuit
PADDLE DOWN, PADDLE DOWN GND
Test point 1
Cable reel connector C (20P) No. 4 (BLU)
Test point 2
Cable reel connector C (20P) No. 11 (BLK)


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:

Paddle shifter - (downshift switch) operation check
?1.
Disconnect the following connector.

?2.
Check for continuity between test points 1 and 2.
Test condition
Ignition switch LOCK (0), or OFF mode
 
Cable reel connector C (20P): disconnected
 
Paddle shifter - (downshift switch) 4P connector: disconnected
Test circuit
GND, PADDLE DOWN(MINUS)
Test point 1
Paddle shifter - (downshift switch) 4P connector No. 1 (BLK)
Test point 2
Paddle shifter - (downshift switch) 4P connector No. 2 (BLK)


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
     
     
     
5.
Open wire check (GND line):

Open wire check (GND line)
?1.
Remove the cable reel.

?2.
Check for continuity between test points 1 and 2.
Test condition
Ignition switch LOCK (0), or OFF mode
 
Cable reel connector A (20P): disconnected
 
Cable reel connector C (20P): disconnected
Test circuit
GND
Test point 1
Cable reel connector A (20P) No. 1 (BRN)
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
The GND wire is OK. Go to step 6.
     
NO
     
     
     
Repair an open in the GND wire between cable reel connector A (20P) and body ground (G502), or repair poor body ground (G502).?
6.
Shorted wire check (PADDLE SW DOWN line):

Shorted wire check (PADDLE SW DOWN line)
?1.
Check for continuity between test points 1 and 2.
Test condition
Ignition switch LOCK (0), or OFF mode
 
Cable reel connector A (20P): disconnected
 
Cable reel connector C (20P): disconnected
Test circuit
PADDLE SW DOWN
Test point 1
Cable reel connector A (20P) No. 17 (RED)
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Repair a short to body ground in the PADDLE SW DOWN wire between cable reel connector A (20P) and the PCM.?
     
NO
     
     
     
The PADDLE SW DOWN wire is not shorted. Go to step 7.
7.
Determine possible failure area (PADDLE SW DOWN line, cable reel):

Determine possible failure area (PADDLE SW DOWN line, cable reel)
?1.
Reconnect PCM connector A (51P).

?2.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?3.
Measure the voltage between test points 1 and 2.
Test condition
Ignition switch ON (II), or ON mode
 
Cable reel connector A (20P): disconnected
 
Cable reel connector C (20P): disconnected
Test circuit
GND, PADDLE SW DOWN
Test point 1
Cable reel connector A (20P) No. 1 (BRN)
Test point 2
Cable reel connector A (20P) No. 17 (RED)


Is there battery voltage?

     
YES
     
     
     
     
NO
     
     
     
Go to step 8.
8.
Open wire check (PADDLE SW DOWN line):

Open wire check (PADDLE SW DOWN line)
?1.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?2.
Jump the SCS line with the HDS.


?3.
Disconnect the following connector.

?4.
Connect terminals A and B with a jumper wire.
Terminal A
Cable reel connector A (20P) No. 17 (RED)
Terminal B
Body ground


?5.
Check for continuity between test points 1 and 2.
Test condition
Ignition switch LOCK (0), or OFF 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 circuit
PADDLE SW DOWN
Test point 1
PCM connector A (51P) No. 20 (RED)
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
The PADDLE SW DOWN wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom goes away, replace the original PCM.?
     
NO
     
     
     
Repair an open in the PADDLE SW DOWN wire between cable reel connector A (20P) and the PCM.?