Ignition Switch Circuit

THEFT DETERRENT: THEFT DETERRENT SYSTEM (w/ Smart Key System): Ignition Switch Circuit

Ignition Switch Circuit

DESCRIPTION

The main body ECU determines the ignition position (OFF, ACC, ON) based on signals from the IG or ACC circuit.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM
(a) Connect Techstream (with CAN VIM) to the DLC3.
(b) Turn the ignition switch ON.
(c) Turn Techstream main switch on.
(d) Select the item below in the Data List and read the display on Techstream.

Main Body:





OK:
When the ignition switch is operated, the display changes as shown in the table.
NG -- CHECK HARNESS AND CONNECTOR (BATTERY - INSTRUMENT PANEL J/B)
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. CHECK HARNESS AND CONNECTOR (BATTERY - INSTRUMENT PANEL J/B)




(a) Disconnect the IA J/B connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (BATTERY - MAIN BODY ECU)




(a) Disconnect the E7 ECU connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL J/B - MAIN BODY ECU)




(a) Remain the E7 ECU connector still disconnected.




(b) Disconnect the II J/B connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL J/B - BODY GROUND)




(a) Disconnect the IF J/B connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY