3.
Has a problem been found?
YES
a.
Repair as necessary and go to "Verification Vehicle Repair" procedure
NO
a.
Go to "Signal Circuit Inspection" procedure
Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
Has a problem been found?
YES
Repair as necessary and go to "Verification Vehicle Repair" procedure
NO
Go to "Signal Circuit Inspection" procedure
Ignition "OFF"
Disconnect DR Air Mix Actuator
Measure resistance between terminal "4" of DR Air Mix Potentiometor and terminal "10" of A/C control unit.
Specification :Approx. 0 Ω
Is the measured resistance within specifications?
YES
Go to "Check for short to ground in harness" procedure.
NO
Check for open in signal harness. Repair as necessary and go to "Verification Vehicle Repair" procedure.
Ignition "OFF"
Disconnect DR Air Mix Actuator
Measure resistance between terminal "4" of DR Air Mix Potentiometor and chasis ground
Specification :Approx. ∞ Ω
Is the measured resistance within specifications?
YES
Go to "Power circuit Inspection" procedure
NO
Check for short to ground in signal harness. Repair as necessary and go to "Verification Vehicle Repair" procedure.
Ignition "ON"
Connect DR Air Mix Potentiometor.
Measure voltage between terminal "5" of DR Air Mix Potentiometor and chasis ground
Specification :Approx.5V
Is the measured voltage within specifications?
YES
Go to "Ground circuit Inspection" procedure.
NO
Check for short or open in power harness. Repair as necessary and go to "Verification Vehicle Repair" procedure.
Ignition "OFF"
Disconnect DR Air Mix Potentiometor.
Measure resistance between terminal "3" of DR Air Mix Potentiometor and chasis ground
Specification :Approx. 0 Ω
Is the measured resistance within specifications?
YES
Go to "Component Inspection" procedure
NO
Check for open in ground harness. Repair as necessary and go to "Verification Vehicle Repair" procedure.
