Can Communication System (For Sedan) Air Conditioning Amplifier Communication Stop Mode

Power Source Network. Yaris. Ncp93, 131
Networking. Yaris. Ncp93, 131

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN BUS LINE FOR DISCONNECTION (AIR CONDITIONING AMPLIFIER BRANCH WIRE)

CHECK HARNESS AND CONNECTOR (IG+, GND)

CAN COMMUNICATION SYSTEM (for Sedan) - Air Conditioning Amplifier Communication Stop Mode


DESCRIPTION


Detection Item
Symptom
Trouble Area
Air Conditioning Amplifier Communication Stop Mode
  1. "Air Conditioner" not displayed on "Communication Bus Check" screen of Techstream
  2. Applies to "Air Conditioning Amplifier Communication Stop Mode" in "DTC combination table"
  1. Power source circuit of air conditioning amplifier
  2. Air conditioning amplifier branch wire or connector
  3. Air conditioning amplifier
HINT:
For vehicle with air conditioning or PTC heater only.

WIRING DIAGRAM


Yaris. Ncp93, 131.Networking.Can Communication System (For Sedan).Can Communication System (For Sedan) Air Conditioning Amplifier Communication Stop Mode


INSPECTION PROCEDURE

NOTICE:
  1. Turn the ignition switch off before measuring the resistances of the CAN main wire and the CAN branch wire.
  2. After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not in operation.
  3. Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors. If doors need to be opened in order to check connectors, open the doors and leave them open.
  4. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
HINT:
  1. Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.
1.CHECK CAN BUS LINE FOR DISCONNECTION (AIR CONDITIONING AMPLIFIER BRANCH WIRE)


    Yaris. Ncp93, 131.Networking.Can Communication System (For Sedan).Can Communication System (For Sedan) Air Conditioning Amplifier Communication Stop Mode

  1. Turn the ignition switch off.

  1. Disconnect the E8 air conditioning amplifier connector.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    E8-2 (TX+) - E8-3 (TX-)
    		Ignition switch off
    		54 to 69 Ω
    Text in Illustration
    *1
    		Rear view of wire harness connector
    (to Air Conditioning Amplifier)


NG
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO AIR CONDITIONING AMPLIFIER (CAN-H, CAN-L)
OK


2.CHECK HARNESS AND CONNECTOR (IG+, GND)


    Yaris. Ncp93, 131.Networking.Can Communication System (For Sedan).Can Communication System (For Sedan) Air Conditioning Amplifier Communication Stop Mode

  1. Disconnect the E8 air conditioning amplifier connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E8-12 (GND) - Body ground
    		Always
    		Below 1 Ω

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    E8-8 (IG+) - Body ground
    		Ignition switch ON
    		11 to 14 V
    Text in Illustration
    *1
    		Rear view of wire harness connector
    (to Air Conditioning Amplifier)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE AIR CONDITIONING AMPLIFIER (YARIS_NCP93 RM000001HO100MX.html)