Displaying & Reading Trouble Codes
NOTE: This is the only information provided by the manufacturer for reading diagnostic trouble codes for this system.PRE-CHECK
1. OUTLINE OF THEFT DETERRENT SYSTEM
When the theft deterrent system detects any theft, it informs people around with flashing lights and sound.
HINT: There are 4 conditions in this system which are disarmed state, arming preparation, armed state and alarm sounding.
1. Disarmed state
- When the alarming function does not operate.
- Theft deterrent function is not performed.
2. Arming preparation
- Time until transferring to armed state.
- Theft deterrent function is not performed.
3. Armed state
When theft deterrent function is possible.
4. Alarm sounding:
In the armed state condition, once theft is detected, it is informed using light and sound to people around the vehicle. Refer to the table for alarming method or timed.
HINT: Alarming output for hazard is same as the one for the hazard on the vehicle. In the arming condition when either of doors is unlocked with key not in the key cylinder, force lock signal is output.
Part 1:
Part 2:
2. ACTIVE ARMING MODE
3. INDICATOR LIGHT OUTPUT
HINT: Even in disarmed state, the indicator light flashes. (Due to the signal output from immobilizer system). The indicator always flashes receiving the signal from the immobilizer system at any time in the armed state.
Flashing frequency:
0.2 seconds (ON)
1.8 seconds (OFF)
Answer back:
The hazard lights flash as answer back under the following conditions.
1. When the system is set.
When arming preparation is set from disarmed state using the wireless door lock, the hazard lights flash once.
2. When the system is released.
When disarmed state is set from either arming preparation, armed state or alarm sounding using the wireless door lock, the hazard lights flash twice.
Part 1:
Part 2:
4. PASSIVE ARMING MODE
- This mode can be switched according to the specified operation.
- All initially set modes (when shipped from factory) are active mode. (No passive mode)
HINT: In armed state either closed door is opened, entry delay occurs. (14 secs.)
During this time, the mode transfers to disarmed state when the condition described above * is met.
When the condition is not met, the system judges theft occurs, the mode transfers to alarm sounding.
5. INDICATOR LIGHT OUTPUT
HINT: Even in disarmed state, the indicator light flash. (Due to the signal output from immobilizer system). The indicator always flashes receiving the signal from the immobilizer system at any time in the arming condition.
Flashing frequency:
0.2 seconds (ON)
1.8 seconds (OFF)
6. TRANSFER TO ACTIVE MODE
In each passive mode, when "disarmed state of active mode arming preparation transfer condition" is met, the active mode transfers to each condition. In this case, active mode continues till disarmed state.
7. FORCED DOOR LOCK CONTROL
Forced door lock is a control that prevents intrusion into vehicles. When a door is unlocked (when an alarm is started), instantaneously forced door lock will be executed.
1. Condition for Starting Forced Door Lock
Detecting any of the following conditions activates the forced door lock.
- Alarm system is in alarm status in active mode.
- Except for the case that the key unlock/luggage unlock switch is turned on.
- No key is in the ignition key cylinder.
- Some of the doors are unlocked.
- Since the start of the last forced lock, 0.38 sec. or more has been elapsed.
2. Conditions for Stopping Forced Door Lock
Detecting any of the following conditions stops the forced door lock.
- All doors are locked.
- An alarm is finished.
- A key is inserted into the key cylinder.
8. ALARM MEMORY CONTROL
If an alarm is activated while a user leaves the vehicle, when the user comes back to the vehicle and reset the security system, the tail lights will light up for 2 sec. to show the alarm occurrence.
9. DTC CHECK (Using LEXUS hand-held tester)
a. Prepare the LEXUS hand-held tester.
b. Connect the LEXUS hand-held to DLC3.
c. Turn the ignition switch ON and the LEXUS hand-held tester main switch ON.
d. Use the LEXUS hand-held tester to check the DTCs, note them down. (For opening instructions, see the LEXUS hand-held tester's instruction book).
e. See to confirm the details of the DLC3.
10. DTC CLEARANCE
DTC will be cleared when the trouble output to DTC is recovered normally.
11. THEFT DETERRENT SYSTEM CIRCUIT LIST
The following list is for the circuits connected to the Theft Deterrent ECU.
Please use this list for trouble shooting.
Please refer to the Circuit Inspection mentioned Later for the details of the circuits.