RM3660EC _58 Vehicle Interior _080733 HEATING / AIR CONDITIONING _0598792 AIR CONDITIONING SYSTEM(for HV Model (8ZR-FXE)) J

HEATING / AIR CONDITIONING AIR CONDITIONING SYSTEM(for HV Model (8ZR-FXE)) No Heating at All

DESCRIPTION

If cool air blows from the registers regardless of the temperature setting of the air conditioning system, the following factors may be the cause.

Symptom	Factor
· No warm air comes out (Blower control is normal) · Outlet air temperature does not increase (Blower control is normal)	· Engine coolant temperature (low) · Air mix damper and link operation (jamming) · Warm-up control · Blockage in heater radiator unit sub-assembly · Heater radiator unit sub-assembly malfunction

1.READ VALUE USING GTS (COOLANT TEMPERATURE)

Read the Data List according to the display on the GTS.

Powertrain > Engine > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Coolant Temperature	Engine coolant temperature	Min.: -40°C (-40°F) Max.: 140°C (284°F)	75 to 100°C (167 to 212°F): After warming up	This is the engine coolant temperature. HINT: · After warming up the engine, the engine coolant temperature will be 75 to 100°C (167 to 212°F). · After a long soak, the engine coolant temperature, intake air temperature and ambient air temperature will be approximately equal. · If the value is -40°C (-40°F), or higher than 135°C (275°F), the sensor circuit is open or shorted. · Check if the engine overheats if the value indicated is higher than 135°C (275°F).

Powertrain > Engine > Data List

Tester Display
Coolant Temperature

50003 372 205

Result:

Proceed to
OK
NG

2.PERFORM ACTIVE TEST USING GTS

GO TO COOLING SYSTEM

2.PERFORM ACTIVE TEST USING GTS

Perform the Active Test according to the display on the GTS.

Body Electrical > Air Conditioner > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Front Air Mix Damper Control Motor (Potentio)	This test activates the front air mix damper control motor (potentio). (No. 3 air conditioning radiator damper servo sub-assembly)	0 %: Min 100 %: Max	Operate with the ignition switch ON.

Body Electrical > Air Conditioner > Active Test

Active Test Display
Front Air Mix Damper Control Motor (Potentio)

Data List Display
Front Air Mix Damper Control Motor Actual Opening (Potentio)

50004 450 89 461

Result:

Proceed to
OK
NG

REPLACE HEATER RADIATOR UNIT SUB-ASSEMBLY

GO TO DIAGNOSTIC TROUBLE CODE CHART (FOR SERVO MOTOR OF APPLICABLE ABNORMAL OPERATION)