Testing System With Socket Box, Volt and Ohmmeter, and Remedies

Special tools


NOTE: Perform test program if cause of trouble is unknown or if the in-car temperature set on temperature wheel is not attained.

Prior to starting the following test, check fuses 1 and 3 in electric center.

Preparations for test







1 Remove pushbutton switch unit Service and Repair
2 Connect socket box to harness for pushbutton switch unit by connecting the line of socket box marked red with lacing of harness marked red (pushbutton switch unit remains disconnected up to test step 3).

Test Step 1 & 2:

Test Step 3 & 4:

Test Step 5:

Test Step 6, 7 & 8:

Test Step 9, 10 & 11:

Test Step 12, 13, 14, & 15:

Test Step 16, 17, 18, & 19:

Test Step 20: