DESCRIPTION
This circuit detects whether the ignition switch is ON or off, and sends this information to the main body ECU (multiplex network body ECU).
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. |
READ VALUE USING TECHSTREAM (IG SW) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Data List.
(e) According to the display on the Techstream, read the Data List.
Main Body
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 |
"OFF" is also displayed for this item when the ignition switch is ACC. |
OK:
The display is as specified in the normal condition column.
OK | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
2. |
CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK - BATTERY AND BODY GROUND) |
(a) Disconnect the driver side junction block connectors. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
1K-1 - Body ground |
Always |
11 to 14 V |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
1D-5 - Body ground |
Always |
Below 1 Ω |
*a |
Front view of wire harness connector (to Driver Side Junction Block) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. |
CHECK HARNESS AND CONNECTOR (IG POWER SOURCE CIRCUIT) |
(a) Disconnect the driver side junction block connector. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
1A-16 - Body ground |
Ignition switch ON |
11 to 14 V |
*a |
Front view of wire harness connector (to Driver Side Junction Block) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
4. |
CHECK DRIVER SIDE JUNCTION BLOCK |
(a) Remove the driver side junction block (See page
|
|
(b) Reconnect the 1K, 1A and 1D driver side junction block connectors.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
MB-32 (IG) - Body ground |
Ignition switch ON |
11 to 14 V |
*a |
Component without harness connected (Driver Side Junction Block) |
OK | ![]() |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
NG | ![]() |
REPLACE DRIVER SIDE JUNCTION BLOCK |
Rear Occupant Classification Sensor LH Collision Detection (B1787)
DESCRIPTION
DTC B1787 is set when the occupant detection ECU receives a collision detection
signal, which is sent by the occupant classification sensor rear LH when an accident
occurs.
DTC B1787 is also set when the front seat with adjuster frame assembly RH is
subjected to a strong impact, ...
Customize Parameters
CUSTOMIZE PARAMETERS
1. CUSTOMIZE SMART KEY SYSTEM (for Entry Function)
HINT:
The following items can be customized.
NOTICE:
When the customer requests a change in a function, first make sure that
the function can be customized.
Record the current settings before customizing.
...
Blind Spot Monitor Slave Module (C1AB7)
DESCRIPTION
This DTC is stored when the blind spot monitor sensor RH detects an internal
malfunction.
DTC Code
DTC Detection Condition
Trouble Area
C1AB7
The blind spot monitor sensor RH (slave) detects an internal malfunction.
...