DESCRIPTION
This circuit detects the ignition switch ON or off condition, and sends it to the main body ECU.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
1. |
READ VALUE USING TECHSTREAM (IGNITION SWITCH) |
(a) Using the Techstream, read the Data List (See page
).
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
IG SW |
Ignition switch ON signal / ON or OFF |
ON: Ignition switch ON OFF: Ignition switch off |
- |
OK:
Normal conditions listed above are displayed.
OK | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
2. |
CHECK HARNESS AND CONNECTOR (BATTERY - MAIN BODY ECU) |
(a) Remove the main body ECU (See page
|
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
A-32 (IG) - Body ground |
Ignition switch ON |
11 to 14 V |
*a |
Front view of wire harness connector (to Main Body ECU) |
OK | ![]() |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Removal
REMOVAL
CAUTION / NOTICE / HINT
CAUTION:
Wear protective gloves. Sharp areas on the parts may injure your hands.
HINT:
The procedure listed below is for the RH side.
PROCEDURE
1. PRECAUTION
CAUTION:
Be sure to read Precaution thoroughly before ...
Bleeding
BLEEDING
CAUTION / NOTICE / HINT
NOTICE:
Bleed air with the shift lever in P and the parking brake set.
Bleed air while adding fluid to maintain the fluid level between the
MIN and MAX lines of the reservoir.
As brake fluid may overflow ...