Air Conditioning System (For Hatchback) Ptc Heater Circuit

Vehicle Interior. Yaris. Ncp93, 131
Heating Air Conditioning. Yaris. Ncp93, 131

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST USING TECHSTREAM

INSPECT QUICK HEATER ASSEMBLY

PERFORM ACTIVE TEST USING TECHSTREAM

CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY - BATTERY AND IG1 NO. 1 RELAY)

CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY - BODY GROUND)

PERFORM ACTIVE TEST USING TECHSTREAM

CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY - AIR CONDITIONING AMPLIFIER ASSEMBLY)

AIR CONDITIONING SYSTEM (for Hatchback) - PTC Heater Circuit


DESCRIPTION

The No. 2 integration relay is controlled in accordance with signals from the air conditioning amplifier assembly and power is supplied to the quick heater assembly installed on the radiator heater unit.

WIRING DIAGRAM


Yaris. Ncp93, 131.Heating Air Conditioning.Air Conditioning System (For Sedan).Air Conditioning System (For Hatchback) Ptc Heater Circuit


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedures.
1.PERFORM ACTIVE TEST USING TECHSTREAM

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the Techstream on.

  1. Enter the following menus: Body Electrical / Air Conditioner / Active Test.

  1. According to the display on the Techstream, perform the Active Test.

    Air Conditioner
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Heater Active Level
    		Heater level
    		Min.: 0, Max.: 3
    		-


    Yaris. Ncp93, 131.Heating Air Conditioning.Air Conditioning System (For Sedan).Air Conditioning System (For Hatchback) Ptc Heater Circuit

  1. Measure the voltage according to the value(s) in the table below while performing the Active Test.

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    0 (DAG0) - Body ground
    		Heater Active Level 1 to 3
    		3.5 to 5 V
    1 (DAG1) - Body ground
    		Heater Active Level 1 to 3
    		3.5 to 5 V
    Text in Illustration
    *a
    		Upper View of No. 2 Integration Relay


NG
Go to step 4
OK


2.INSPECT QUICK HEATER ASSEMBLY

  1. Inspect the quick heater assembly (YARIS_NCP93 RM00000315V01EX.html).



NG
REPLACE QUICK HEATER ASSEMBLY (YARIS_NCP93 RM000004O3Z004X.html)
OK


3.PERFORM ACTIVE TEST USING TECHSTREAM

  1. Disconnect the A69 quick heater assembly connector.

  1. Connect the Techstream to the DLC3.

  1. Start the engine.

  1. Turn the Techstream on.

  1. Enter the following menus: Body Electrical / Air Conditioner / Active Test.

  1. According to the display on the Techstream, perform the Active Test.

    Air Conditioner
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Heater Active Level
    		Heater level
    		Min.: 0, Max.: 3
    		-


    Yaris. Ncp93, 131.Heating Air Conditioning.Air Conditioning System (For Sedan).Air Conditioning System (For Hatchback) Ptc Heater Circuit

  1. Measure the voltage according to the value(s) in the table below while performing the Active Test.

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    A69-1 (B) - Body ground
    		Heater Active Level 0
    		Below 1 V
    Heater Active Level 1
    		Below 1 V
    Heater Active Level 2
    		Below 1 V
    Heater Active Level 3
    		11 to 14 V
    A69-2 (B) - Body ground
    		Heater Active Level 0
    		Below 1 V
    Heater Active Level 1
    		11 to 14 V
    Heater Active Level 2
    		11 to 14 V
    Heater Active Level 3
    		11 to 14 V
    A69-3 (B) - Body ground
    		Heater Active Level 0
    		Below 1 V
    Heater Active Level 1
    		Below 1 V
    Heater Active Level 2
    		11 to 14 V
    Heater Active Level 3
    		11 to 14 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Quick Heater Assembly)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (QUICK HEATER ASSEMBLY - NO. 2 INTEGRATION RELAY)
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (YARIS_NCP93 RM000001M2W05EX.html)

4.CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY - BATTERY AND IG1 NO. 1 RELAY)
Yaris. Ncp93, 131.Heating Air Conditioning.Air Conditioning System (For Sedan).Air Conditioning System (For Hatchback) Ptc Heater Circuit

  1. Remove the No. 2 integration relay from the No. 2 engine room relay block.

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    2-1 (ALT) - Body ground
    		Always
    		11 to 14 V
    2C-2 (IG1) - Body ground
    		Ignition switch ON
    		11 to 14 V
    Text in Illustration
    *1
    		No. 2 Engine Room Relay Block
    *a
    		Front view of wire harness connector
    (to No. 2 Integration Relay)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY - BODY GROUND)


    Yaris. Ncp93, 131.Heating Air Conditioning.Air Conditioning System (For Sedan).Air Conditioning System (For Hatchback) Ptc Heater Circuit

  1. Remove the No. 2 integration relay from the No. 2 engine room relay block.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    2B-1 (GND1) - Body ground
    		Always
    		Below 1 Ω
    2C-16 (GND2) - Body ground
    		Always
    		Below 1 Ω
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to No. 2 Integration Relay)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


6.PERFORM ACTIVE TEST USING TECHSTREAM

  1. Remove the No. 2 integration relay from the No. 2 engine room relay block.

  1. Connect the Techstream to the DLC3.

  1. Start the engine.

  1. Turn the Techstream on.

  1. Enter the following menus: Body Electrical / Air Conditioner / Active Test.

  1. According to the display on the Techstream, perform the Active Test.

    Air Conditioner
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Heater Active Level
    		Heater level
    		Min.: 0, Max.: 3
    		-


    Yaris. Ncp93, 131.Heating Air Conditioning.Air Conditioning System (For Sedan).Air Conditioning System (For Hatchback) Ptc Heater Circuit

  1. Measure the voltage according to the value(s) in the table below while performing the Active Test.

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    2C-12 (PTCA) - Body ground
    		Heater Active Level 0
    		Below 1 V
    Heater Active Level 1
    		11 to 14 V
    Heater Active Level 2
    		11 to 14 V
    Heater Active Level 3
    		11 to 14 V
    2C-13 (PTCB) - Body ground
    		Heater Active Level 0
    		Below 1 V
    Heater Active Level 1
    		Below 1 V
    Heater Active Level 2
    		11 to 14 V
    Heater Active Level 3
    		11 to 14 V
    2C-14 (PTCC) - Body ground
    		Heater Active Level 0
    		Below 1 V
    Heater Active Level 1
    		Below 1 V
    Heater Active Level 2
    		Below 1 V
    Heater Active Level 3
    		11 to 14 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to No. 2 Integration Relay)


NG
Go to step 7
OK

REPLACE NO. 2 INTEGRATION RELAY

7.CHECK HARNESS AND CONNECTOR (NO. 2 INTEGRATION RELAY - AIR CONDITIONING AMPLIFIER ASSEMBLY)

  1. Remove the No. 2 integration relay from the No. 2 engine room relay block.

  1. Disconnect the D130 air conditioning amplifier assembly connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    2C-12 (PTCA) - D130-13 (PTC1)
    		Always
    		Below 1 Ω
    2C-13 (PTCB) - D130-19 (PTC2)
    		Always
    		Below 1 Ω
    2C-14 (PTCC) - D130-20 (PTC3)
    		Always
    		Below 1 Ω
    2C-12 (PTCA) - Body ground
    		Always
    		10 kΩ or higher
    2C-13 (PTCB) - Body ground
    		Always
    		10 kΩ or higher
    2C-14 (PTCC) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (YARIS_NCP93 RM00000214000EX.html)