Rodeo (2WD) L4-2559cc 2.6L SOHC (4ZE1) (1991)
Air Conditioning Switch: Testing and Inspection
NOTE: A number of problems, in addition of a defective A/C switch, can cause A/C system malfunctions.
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With engine at operating temperature and running at idle, probe ECM terminal 15 (green wire, ECM 18 pin connector) with positive voltmeter
lead and ground negative lead.
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Turn A/C switch "ON." Meter should read battery voltage, indicating that switch is functioning properly and A/C request signal is reaching
the ECM.
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If problems are indicated, check wiring circuits and connections. For complete diagnosis and repair information on the air conditioning
system, refer to HEATING, VENTILATION AND AIR CONDITIONING.