Check for continuity between the terminals at different switch positions.
2. Checking for conductivity between the terminals of the "A" and "B" connectors of the control panel (push button panel type) at different positions of the system switches.
a) Checking the presence of conductivity between the terminals of the "A" and "B" connectors of the control panel at different positions of the "A/C - ECON" switch.
b) Checking for conductivity between the terminals of the "A" and "B" connectors on the control panel at different positions of the blower direction switch.
c) Checking for conductivity between the terminals of connector "A" and "B" of the control panel at different positions of the air intake switch.
Except for 4A-FE engines
g) (For 4A-FE engines). Check for conductivity between terminals "A14" - "B6" of the control panel connector.
3. Checking the resistance of the temperature controller.
a) Measure the resistance between terminals "A8" - "B18" of the control panel connector.
- Resistance - 3 kOhm
b) Connect the tester to terminals "B18" - "A9" of the control panel connector and measure the resistance between the terminals with the coolant water valve switch in the MAX HOT and MAX COLD positions.
(The original can be viewed on the website: TOYOTAMAN)
- MAX NOTE - 3 kOhm
- MAX COLD — 0 Ohm
c) Make sure that when you switch the switch from the MAX COLD position to the MAX HOT position, the resistance changes.