Paddle Shifter - (Downshift Switch) Circuit Troubleshooting
Paddle Shifter - (Downshift Switch) Circuit TroubleshootingSRS components are located in this area. Review the SRS component locations and the precautions and procedures in the SRS before doing repairs or service.
1. Remove the steering wheel.
2. Check for continuity between the steering wheel switch harness 20P connector terminals No. 16 and No. 7 while pressing the paddle shifter (downshift switch) and when the shifter is released.
Is there continuity while pressing the paddle shifter - and no continuity when the shifter is released?
YES - Go to step 5.
NO - Go to step 3.
3. Disconnect the paddle shifter - (downshift switch) connector.
4. Check for continuity between the paddle shifter - (downshift switch) connector terminals No. 1 and No. 2 while pressing the shifter and when the shifter is released.
Is there continuity while pressing the paddle shifter - and no continuity when the shifter is released?
YES - Replace the steering wheel switch harness.
NO - Replace the paddle shifter - (downshift switch)).
5. Remove the cable reel.
6. Check for continuity between the cable reel 20P connector terminal No. 15 and body ground.
Is there continuity?
YES - Go to step 7.
NO - Repair open in the wire between the cable reel 20P connector terminal No. 15 and ground (G501), or repair poor ground (G501).
7. Check for continuity between the cable reel 20P connector terminal No. 6 and body ground.
Is there continuity?
YES - Repair short to body ground in the wire between the cable reel 20P connector terminal No. 6 and PCM connector terminal D15.
NO - Go to step 8.
8. Turn the ignition switch to ON (II), and shift to M.
9. Measure the voltage between the cable reel 20P connector terminals No. 6 and No. 15.
Is there battery voltage?
YES - Replace the cable reel.
NO - Go to step 10.
10. Measure the voltage between the PCM connector terminal D15 and body ground.
Is there battery voltage?
YES - Repair open in the wire between the PCM connector terminal D15 and the cable reel 20P connector.
NO - Check for loose or poor connections at the PCM connector terminal D15. If the connection is OK, substitute a known-good PCM and recheck.