PRE-CRASH SAFETY SYSTEM Heater Relay Circuit

DESCRIPTION

The pre-crash safety city sensor controls the TSS C HTR relay to turn the pre-crash safety city heater on and off.

WIRING DIAGRAM

A00322CE04

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (PRE-CRASH SAFETY CITY HEATER POWER SOURCE CIRCUIT)


    1. A0031YFC08
      *a

      Front view of wire harness connector

      (to Pre-crash Safety City Heater Wire)

      Disconnect the O10 pre-crash safety city heater wire connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      O10-1 (IG) - Body ground Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (PRE-CRASH SAFETY CITY HEATER POWER SOURCE CIRCUIT)

    OK

  2. INSPECT PRE-CRASH SAFETY CITY HEATER WIRE


    1. Connect the O10 pre-crash safety city heater wire connector.

    2. A00322AC05
      *a

      Rear view of wire harness connector

      (to Pre-crash Safety City Heater Wire)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      O10-2 (GND) - Body ground Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT PRE-CRASH SAFETY CITY HEATER WIRE Click here

    OK

  3. INSPECT TSS C HTR RELAY


    1. Remove the TSS C HTR relay.

    2. Inspect the TSS C HTR relay.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE TSS C HTR RELAY

    OK

  4. CHECK HARNESS AND CONNECTOR (PRE-CRASH SAFETY CITY HEATER WIRE - TSS C HTR RELAY AND PRE-CRASH SAFETY CITY SENSOR)


    1. Turn the power switch off.

    2. Disconnect the O10 pre-crash safety city heater wire connector.

    3. Disconnect the O9 pre-crash safety city sensor connector.

    4. Remove the TSS C HTR relay.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O10-2 (GND) - TSS C HTR relay holder terminal 3 Always Below 1 Ω
      O10-2 (GND) - O9-1 (SPR) Always Below 1 Ω
      O9-1 (SPR) - TSS C HTR relay holder terminal 3 Always Below 1 Ω
      O10-2 (GND), O9-1 (SPR) or TSS C HTR relay holder terminal 3 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (PRE-CRASH SAFETY CITY HEATER WIRE - TSS C HTR RELAY OR PRE-CRASH SAFETY CITY SENSOR)

    OK

  5. CHECK HARNESS AND CONNECTOR (TSS C HTR RELAY - BODY GROUND)


    1. Remove the TSS C HTR relay.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      TSS C HTR relay holder terminal 5 - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE PRE-CRASH SAFETY CITY HEATER Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (TSS C HTR RELAY - BODY GROUND)

  6. INSPECT PRE-CRASH SAFETY CITY HEATER WIRE


    1. Remove the pre-crash safety city heater wire.

    2. A00325PC04
      *a

      Component without harness connected

      (Pre-crash Safety City Heater Wire)
      A Terminal (Wiring Color "R")
      B Terminal (Wiring Color "W-B")

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O10-1 (IG) - A Always Below 1 Ω
      O10-2 (GND) - B Always Below 1 Ω
      O10-1 (IG) or A - Body ground Always 10 kΩ or higher
      O10-2 (GND) or B - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE PRE-CRASH SAFETY CITY HEATER Click here

    NG

    REPLACE PRE-CRASH SAFETY CITY HEATER WIRE Click here