TSX L4-2.4L (2005)
18. Turn the ignition switch off.
19. Measure the resistance between the No. 14 and No. 15 terminals of the audio-HVAC display panel connector A (22P).
Is the resistance less than 24 kOhm?
YES - Check for loose wire or poor connections at audio-HVAC display panel connector A (22P) and at the A/C pressure switch 2P connector. If
the connections are good, substitute a known-good audio-HVAC display panel, and recheck. If the symptom/indication goes away, replace the
original audio-HVAC display panel.
NO - Test the evaporator temperature sensor.
20. Using a backprobe set, measure the voltage between the No. 2 terminal of under-hood fuse/relay box connector H (14P) and body ground with the
under-hood fuse/relay box connectors connected.
Is there 5 V or more?
YES - Repair open in the wire between the under-hood fuse/relay box and the A/C pressure switch.
NO - Check for loose or poor connections at the No. 2 terminal of the under-hood fuse/relay box. if the connections are OK, replace the
under-hood fuse/relay box.
21. Check for proper A/C system pressure.
Is the pressure within specifications?
YES - Replace the A/C pressure switch.
NO - Repair the A/C pressure problem.
