Audio System - Interface dial and center switch panel buttons do not work(Without Navigation) (2016 2017 2018)
Interface dial and center switch panel buttons do not work
- Check the vehicle battery condition first .
- Check the connectors for poor connections or loose terminals.
- Problem verification
-1. Press the engine start/stop button to select the ON mode.
-2. Check if the center display operates by using the interface dial and the center switch panel hard buttons.
Do the interface dial and the center switch panel hard buttons workΩ
YES
Intermittent failure, the system is OK at this time.
NO
The failure is duplicated, go to step 2.
- Open wire check (ACC line)
-1. Press the engine start/stop button to select the OFF mode.
-2. Disconnect the following connector.
Center switch panel/interface dial 7P connector -3. Press the engine start/stop button to select the ON mode.
-4. Measure the voltage between test points 1 and 2.
Test condition ON mode Center switch panel/interface dial 7P connector: disconnected Test circuit ACC Test point 1 Center switch panel/interface dial 7P connector No. 1 (PUR) Test point 2 Body ground Is there battery voltage?
YES
The ACC wire is OK. Go to step 3.
NO
Repair an open in the wire between the No. B19 (7.5 A) fuse in the under-dash fuse/relay box and the center switch panel/interface dial.
- Open wire check (GND line)
-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 Center switch panel/interface dial 7P connector: disconnected Test circuit GND Test point 1 Center switch panel/interface dial 7P connector No. 6 (BLK) Test point 2 Body ground Is there continuity?
YES
The GND wire is OK. Go to step 4.
NO
Repair an open in the wire between the center switch panel/interface dial and body ground (G502).
- Shorted wire check (JOG line)
-1. Disconnect the following connector.
Audio unit connector F (18P) -2. Check for continuity between test points 1 and 2.
Test condition OFF mode Center switch panel/interface dial 7P connector: disconnected Audio unit connector F (18P): disconnected Test circuit JOG Test point 1 Center switch panel/interface dial 7P connector No. 4 (WHT) Test point 2 Body ground Is there continuity?
YES
There is a short to body ground in the wire between the audio unit and the center switch panel/interface dial. Replace the affected shielded harness.
NO
The JOG wire is not shorted to ground. Go to step 5.
- Shorted wire check (JOG SH line to JOG line)
-1. Check for continuity between test points 1 and 2.
Test condition OFF mode Center switch panel/interface dial 7P connector: disconnected Audio unit connector F (18P): disconnected Test circuit JOG SH, JOG Test point 1 Center switch panel/interface dial 7P connector No. 4 (WHT) Test point 2 Center switch panel/interface dial 7P connector No. 5 (BLK) Is there continuity?
YES
There is a short in the wires between the audio unit and the center switch panel/interface dial. Replace the affected shielded harness.
NO
The JOG SH and the JOG wires are not shorted. Go to step 6.
- Open wire check (JOG line)
-1. Check for continuity between test points 1 and 2.
Test condition OFF mode Center switch panel/interface dial 7P connector: disconnected Audio unit connector F (18P): disconnected Test circuit JOG Test point 1 Audio unit connector F (18P) No. 16 (WHT) Test point 2 Center switch panel/interface dial 7P connector No. 4 (WHT) Is there continuity?
YES
The JOG wire is OK. Go to step 7.
NO
There is an open in the wire between the audio unit and the center switch panel/interface dial. Replace the affected shielded harness.
- Center switch panel/interface dial check (substitution)
-1. Substitute a known-good center switch panel/interface dial .
-2. Reconnect all the connectors, and recheck.
Does the symptom go away?
YES
Replace the original center switch panel/interface dial.
NO