Lighting System Ig Signal Circuit
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
READ VALUE USING TECHSTREAM
INSPECT FUSE (ECU-IG NO. 1)
CHECK HARNESS AND CONNECTOR (IG POWER SOURCE CIRCUIT)
LIGHTING SYSTEM - IG Signal Circuit |
DESCRIPTION
The main body ECU receives the IG signal to control the illuminated entry system.
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.READ VALUE USING TECHSTREAM |
Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Enter the following menus: Body Electrical / Main Body / Data List.
Read the display on the Techstream.
Main Body (Main Body ECU)Tester Display
| Measurement Item/Range
| Normal Condition
| Diagnostic Note
|
IG SW
| Ignition switch IG signal/ON or OFF
| ON: Ignition switch ON
OFF: Ignition switch off
| -
|
- OK:
- Normal conditions listed above are displayed.
| 2.INSPECT FUSE (ECU-IG NO. 1) |
Remove the ECU-IG No. 1 fuse from the instrument panel junction block.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Condition
| Specified Condition
|
ECU-IG No. 1 fuse
| Always
| Below 1 Ω
|
| 3.CHECK HARNESS AND CONNECTOR (IG POWER SOURCE CIRCUIT) |
Measure the voltage between the loading slot of the fuse and body ground.
- Standard Voltage:
Tester Connection
| Switch Condition
| Specified Condition
|
ECU-IG No. 1 fuse terminal - Body ground
| Ignition switch off
| Below 1 V
|
Ignition switch ON
| 11 to 14 V
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| OK |
|
|
|
| REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) |
|
