Paddle Shifter Illumination Circuit Troubleshooting
Paddle Shifter Illumination 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.

NOTE:
This troubleshooting describes about the paddle shifter + (upshift switch) illumination circuit and the paddle shifter - (downshift switch) illumination circuit, and the each circuit is separated by an asterisk as follows:
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*1: The paddle shifter + (upshift switch) illumination circuit.
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*2: The paddle shifter - (downshift switch) illumination circuit.
If all illuminations of switches on the steering wheel do not come on simultaneously, check for a blown No. B25 (10 A) fuse in the under-dash fuse/relay box. Replace the No. B25 (10 A) fuse if it is blown, and recheck. If the fuse blows again, repair a short to body ground in the No. B25 (10 A) fuse circuit.
1.
Determine possible failure area (Paddle shifter illumination, and others):

Determine possible failure area (Paddle shifter illumination, and others)
?1.
Remove the driver's airbag.

?2.
Disconnect the following connector(s) in a illumination failure.

?3.
Press the engine start/stop button to select 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
ON mode
 
Combination light switch PARKING (SMALL) position
 
Paddle shifter + (upshift switch) 4P connector*1: disconnected
 
Paddle shifter - (downshift switch) 4P connector*2: disconnected
Test circuit
ILL+, ILL-
Test point 1
Paddle shifter + (upshift switch) 4P connector No. 3 (RED)*1
 
Paddle shifter - (downshift switch) 4P connector No. 3 (RED)*2
Test point 2
Paddle shifter + (upshift switch) 4P connector No. 4 (GRY)*1
 
Paddle shifter - (downshift switch) 4P connector No. 4 (GRY)*2


Is there battery voltage?

     
YES
     
     
     
     
NO
     
     
     
Go to step 2.
2.
Determine possible failure area (Paddle shifter side circuit and cable reel side circuit of the audio remote switch, audio remote switch):

Determine possible failure area (Paddle shifter side circuit and cable reel side circuit of the audio remote switch, audio remote switch)
?1.
Disconnect the following connector.

?2.
Measure the voltage between test points 1 and 2.
Test condition
ON mode
 
Combination light switch PARKING (SMALL) position
 
Audio remote switch 12P connector: disconnected
Test circuit
ILL+, ILL-
Test point 1
Audio remote switch 12P connector No. 9 (GRY)
Test point 2
Audio remote switch 12P connector No. 10 (RED)


Is there battery voltage?

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
Go to step 5.
3.
Shorted wire check (ILL+ line) on the paddle shifter side of the audio remote switch on the cable reel subharness:

Shorted wire check (ILL+ line) on the paddle shifter side of the audio remote switch on the cable reel subharness
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
 
Paddle shifter + (upshift switch) 4P connector*1: disconnected
 
Paddle shifter - (downshift switch) 4P connector*2: disconnected
 
Audio remote switch 12P connector: disconnected
Test circuit
ILL+
Test point 1
Paddle shifter + (upshift switch) 4P connector No. 4 (GRY)*1
 
Paddle shifter - (downshift switch) 4P connector No. 4 (GRY)*2
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Repair a short to body ground in the ILL+ wire between the paddle shifter 4P connector and the audio remote switch 12P connector, or replace the cable reel subharness.?
     
NO
     
     
     
Go to step 4.
4.
Open wires check (ILL+ and ILL- lines) on the paddle shifter side of the audio remote switch on the cable reel subharness:

Open wires check (ILL+ and ILL- lines) on the paddle shifter side of the audio remote switch on the cable reel subharness
?1.
Check for continuity between test points 1 and 2, and points 3 and 4.
Test condition
OFF mode
 
Paddle shifter + (upshift switch) 4P connector*1: disconnected
 
Audio remote switch 12P connector: disconnected
Test circuit
ILL+
Test point 1
Paddle shifter + (upshift switch) 4P connector No. 4 (GRY)*1
Test point 2
Audio remote switch 12P connector No. 1 (GRY)
Test circuit
ILL-
Test point 3
Paddle shifter + (upshift switch) 4P connector No. 3 (RED)*1
Test point 4
Audio remote switch 12P connector No. 6 (RED)

Test condition
OFF mode
 
Paddle shifter - (downshift switch) 4P connector*2: disconnected
 
Audio remote switch 12P connector: disconnected
Test circuit
ILL+
Test point 1
Paddle shifter - (downshift switch) 4P connector No. 4 (GRY)*2
Test point 2
Audio remote switch 12P connector No. 7 (GRY)
Test circuit
ILL-
Test point 3
Paddle shifter - (downshift switch) 4P connector No. 3 (RED)*2
Test point 4
Audio remote switch 12P connector No. 12 (RED)


Is there continuity?

     
YES
     
     
     
Faulty circuit in the audio remote switch, replace the audio remote switch.
     
NO
     
     
     
Repair an open in the ILL+ wire and/or the ILL- wire between the paddle shifter 4P connector and the audio remote switch 12P connector, or replace the cable reel subharness.?
5.
Shorted wire check (ILL+ line) on the cable reel side of the audio remote switch on the cable reel subharness:

Shorted wire check (ILL+ line) on the cable reel side of the audio remote switch on the cable reel subharness
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Disconnect the following connector.

?3.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
 
Cable reel connector C (20P): disconnected
 
Audio remote switch 12P connector: disconnected
Test circuit
ILL+
Test point 1
Audio remote switch 12P connector No. 9 (GRY)
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Repair a short to body ground in the ILL+ wire between the audio remote switch 12P connector and the cable reel connector C (20P), or replace the cable reel subharness.?
     
NO
     
     
     
Go to step 6.
6.
Open wires check (ILL+ and ILL- lines) on the cable reel side of the audio remote switch on the cable reel subharness:

Open wires check (ILL+ and ILL- lines) on the cable reel side of the audio remote switch on the cable reel subharness
?1.
Check for continuity between test points 1 and 2, and points 3 and 4.
Test condition
OFF mode
 
Audio remote switch 12P connector: disconnected
 
Cable reel connector C (20P): disconnected
Test circuit
ILL+
Test point 1
Audio remote switch 12P connector No. 9 (GRY)
Test point 2
Cable reel connector C (20P) No. 1 (GRY)
Test circuit
ILL-
Test point 3
Audio remote switch 12P connector No. 10 (RED)
Test point 4
Cable reel connector C (20P) No. 2 (RED)


Is there continuity?

     
YES
     
     
     
Go to step 7.
     
NO
     
     
     
Repair an open in the ILL+ wire and/or the ILL- wire on the cable reel subharness, or replace the cable reel subharness.?
7.
Determine possible failure area (Cable reel, power supply circuit):

Determine possible failure area (Cable reel, and power supply circuit)
?1.
Remove the cable reel.

?2.
Press the engine start/stop button to select 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
ON mode
 
Combination light switch PARKING (SMALL) position
 
Cable reel connector A (20P): disconnected
Test circuit
ILL+, ILL-
Test point 1
Cable reel connector A (20P) No. 9 (RED)
Test point 2
Cable reel connector A (20P) No. 10 (GRY)


Is there battery voltage?

     
YES
     
     
     
     
NO
     
     
     
Go to step 8.
8.
Open wire check (ILL+ line):

Open wire check (ILL+ line)
?1.
Measure the voltage between test points 1 and 2.
Test condition
ON mode
 
Combination light switch PARKING (SMALL) position
 
Cable reel connector A (20P): disconnected
Test circuit
ILL+
Test point 1
Cable reel connector A (20P) No. 10 (GRY)
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
Go to step 9.
     
NO
     
     
     
Check for a blown No. B25 (10 A) fuse in the under-dash fuse/relay box. If the fuse is OK, repair an open in the ILL+ wire between cable reel connector A (20P) terminal No. 10 and the under-dash fuse/relay box.?
9.
Open wire check (ILL- line):

Open wire check (ILL- line)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Disconnect the following connector.
Gauge control module connector A (32P)

?3.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
 
Cable reel connector A (20P): disconnected
 
Gauge control module connector A (32P): disconnected
Test circuit
ILL-
Test point 1
Cable reel connector A (20P) No. 9 (RED)
Test point 2
Gauge control module connector A (32P) No. 16 (RED)


Is there continuity?

     
YES
     
     
     
Failure the gauge control module, do the gauge control module input test.?
     
NO
     
     
     
Repair an open in the ILL- wire between cable reel connector A (20P) terminal No. 9 and gauge control module A (32P) connector terminal No. 16.?