| Last Modified: 11-29-2007 | 1.6 J | |
| Service Category: Vehicle Interior | Section: Theft Deterrent/Keyless Entry | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000001PR5010X |
| Title: THEFT DETERRENT / KEYLESS ENTRY: THEFT DETERRENT SYSTEM: DESCRIPTION (2008 Sequoia) | ||
|
Security Indicator Light Circuit |
DESCRIPTION
When the theft deterrent system is in the disarmed state, the security indicator will flash continuously if the immobiliser system is set, or not illuminate if the immobiliser system is not set.
When the theft deterrent system is in the armed state, the immobiliser system is automatically set and the security indicator will flash continuously.
When the theft deterrent system is in the arming preparation state and alarm sounding state, the main body ECU causes the security indicator to be illuminated.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
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1. |
PERFORM ACTIVE TEST USING TECHSTREAM |
(a) Connect a Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream main switch on.
(d) Select the item below in the Active Test and then check that the indicator operates.
Main Body
|
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Security Indicator |
Security indicator |
ON/OFF |
- |
OK:
The security indicator light flashes or goes off correctly when operating it through the Techstream.
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2. |
CHECK HARNESS AND CONNECTOR (SECURITY INDICATOR - MAIN BODY ECU) |
|
(a) Disconnect the H1 maim body ECU connector. |
(b) Disconnect the I22 accessory meter connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
H1-4 (IND) - I22-16 (MHTR) |
Always |
Below 1 Ω |
|
H1-4 (IND) - Body ground |
Always |
10 kΩ or higher |
|
|
3. |
CHECK HARNESS AND CONNECTOR (SECURITY INDICATOR - BODY GROUND) |
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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4. |
INSPECT ACCESSORY METER ASSEMBLY |
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(a) Reconnect the I22 accessory meter connector with the J1 main body ECU connector still disconnected. |
(b) Apply battery voltage from the wire harness back side between the specified terminals of the indicator, and check the lighting condition of the security indicator.
OK :
|
Measurement Condition |
Specified Condition |
|---|---|
|
Battery positive (+) → Terminal I22-16 (MHTR) Battery negative (-) → Terminal I22-12 (E) |
Security indicator comes on |
NOTICE:
- If the positive (+) lead and the negative (-) lead are incorrectly connected, the security indicator will not come on.
- Voltage of more than 12 V will damage the security indicator.
- If the voltage is too low, the security indicator will not come on.
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