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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. Check for continuity between steering switch harness 20P connector terminals No. 8 and No. 12 while pressing paddle shifter − (downshift switch) and when the switch is released.
Is there continuity while pressing paddle shifter − (downshift switch) and no continuity when the switch released?
YES -
Go to Step 5 .
NO -
Go to Step 3 .
  1. Disconnect the paddle shifter − (downshift switch) connector.

  1. Check for continuity between paddle shifter − (downshift switch) connector terminals while pressing the switch and when the switch is released.
Is there continuity while pressing the switch and no continuity when the switch released?
YES -
Replace the steering switch harness.■
NO -

  1. Check for continuity cable reel 20P connector terminal No. 2 and body ground.
Is there continuity?
YES -
Go to Step 7 .
NO -
Repair open in the wire between cable reel 20P connector terminal No. 2 and ground (G501), or repair poor ground (G501).■

  1. Check for continuity between cable reel 20P connector terminal No. 5 and body ground.
Is there continuity?
YES -
Repair short to ground in the wire between cable reel 20P connector terminal No. 5 and gear shift control module 12P connector terminal No. 1.■
NO -
Go to Step 8 .
  1. Turn the ignition switch to ON (II), and shift to the A position.

  1. Measure voltage between cable reel 20P connector terminal No. 2 and No. 5.
Is there battery voltage in neutral position and no voltage while pressing shift − (minus) switch?
YES -
NO -
Go to Step 10 .
  1. Turn the ignition switch to LOCK (0).
  1. Jump the SCS line with the HDS.
  1. Disconnect gear shift control module 12P connector.

  1. Check for continuity between gear shift control module 12P connector terminal No. 1 and cable reel 20P connector terminal No. 5.
Is there continuity?
YES -
Check for loose or poor connections at gear shift control module 12P connector terminal No. 1. If the connection is OK, substitute a known-good gear shift control module and recheck.■
NO -
Repair open in the wire between gear shift control module 12P connector terminal No. 1 and cable reel 20P connector.■