LIGHTING SYSTEM ACC Signal Circuit

DESCRIPTION

This circuit detects the power switch on (ACC) or off condition, and sends it to the main body ECU (multiplex network body ECU).

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1. CHECK FOR DTC (ENTRY AND START SYSTEM [for Start Function])

   
   

   1. Check for DTCs.

      Click here

      
      Body Electrical > Power Source Control > Trouble Codes

      OK
      Entry and start system (for Start Function) DTCs are not output.

      Result
      Proceed to OK NG

   
   

   NG

   GO TO ENTRY AND START SYSTEM (for Start Function) Click here

   OK

2. READ VALUE USING GTS

   
   

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

      Click here

      
      Body Electrical > Main Body > Data List

      Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
      ACC SW	Power switch on (ACC) signal	OFF or ON	OFF: Power switch off ON: Power switch on (ACC)	"ON" is also displayed for this item when the power switch is on (IG).

      
      Body Electrical > Main Body > Data List

      Tester Display
      ACC SW

      OK
      Normal conditions listed above are displayed.

      Result
      Proceed to OK NG

   
   

   OK

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

   NG

3. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BATTERY AND BODY GROUND)

   
   
   1. 

      *a	Front view of wire harness connector (to Instrument Panel Junction Block Assembly)

      Disconnect the instrument panel junction block assembly connector.

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

      Standard Voltage
      for LHD Tester Connection Switch Condition Specified Condition 5K-1 - Body ground Power switch off 11 to 14 V 5D-17 - Body ground Power switch on (ACC) 11 to 14 V Power switch off Below 1 V
      for RHD Tester Connection Switch Condition Specified Condition 5K-1 - Body ground Power switch off 11 to 14 V 5D-18 - Body ground Power switch on (ACC) 11 to 14 V Power switch off Below 1 V

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

      Standard Resistance
      for LHD Tester Connection Condition Specified Condition 5D-6 - Body ground Always Below 1 Ω
      for RHD Tester Connection Condition Specified Condition 5D-7 - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

4. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

   
   

   1. Remove the instrument panel junction block assembly.

      Click here

      

      *a

      Component without harness connected (Instrument Panel Junction Block Assembly)

      -

      -

   2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

      Click here

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

      Standard Resistance
      for LHD Tester Connection Condition Specified Condition 5K-1 - A-30 (ACC) Auxiliary battery not connected to 5D-17 and 5D-6 10 kΩ or higher Auxiliary battery positive (+) → 5D-17 Auxiliary battery negative (-) → 5D-6 Below 1 Ω 5D-6 - A-11 (GND1) Always Below 1 Ω
      for RHD Tester Connection Condition Specified Condition 5K-1 - A-30 (ACC) Auxiliary battery not connected to 5D-18 and 5D-7 10 kΩ or higher Auxiliary battery positive (+) → 5D-18 Auxiliary battery negative (-) → 5D-7 Below 1 Ω 5D-7 - A-11 (GND1) Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

   NG

   REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here