Ignition Switch Circuit

LIGHTING: LIGHTING SYSTEM: Ignition Switch Circuit

Ignition Switch Circuit

DESCRIPTION

This circuit detects the state of the ignition switch and sends it to the Multiplex Network Body ECU and Multiplex Network Body ECU No. 2.

WIRING DIAGRAM









INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (IGNITION SWITCH)
(a) Using the Techstream, read the Data List.

Body





OK:
Normal conditions listed above are displayed.
OK -- READ VALUE USING TECHSTREAM (IGNITION SWITCH)
NG -- Continue to next step.
2. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (ACC, SIG)
(a) Disconnect the connector from the instrument panel J/B assembly (driver side J/B assembly).





(b) Check continuity between terminal ACC, SIG of the instrument panel J/B assembly (driver side J/B assembly) on the wire harness side and body ground.
Standard voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
3. READ VALUE USING TECHSTREAM (IGNITION SWITCH)
(a) Using the Techstream, read the Data List.

Body No. 2





OK:
Normal conditions listed above are displayed.
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
NG -- Continue to next step.
4. INSPECT MULTIPLEX NETWORK BODY ECU NO. 2 (SIG)





(a) Disconnect the connector from the multiplex network body ECU No. 2.
(b) Check continuity between terminal SIG of the multiplex network body ECU No. 2 on the wire harness side and body ground.
Standard voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE