Lexus IS250 IS220d GSE20 ALE20 - DOOR LOCK
READ VALUE OF DATA LIST (DOOR UNLOCK DETECTION SWITCH)
INSPECT FRONT DOOR LOCK ASSEMBLY (DOOR UNLOCK DETECTION SWITCH)
CHECK WIRE HARNESS (FRONT DOOR LOCK ASSEMBLY - MAIN BODY ECU RH)
POWER DOOR LOCK CONTROL SYSTEM - Front Passenger Side Door UNLOCK Detection Switch Circuit
DESCRIPTION
The front passenger door unlock detection switch is built into the front passenger door lock assembly. The switch turns on when the front passenger door is locked and turns off when the door is unlocked.
The main body ECU RH is connected to the front passenger door lock assembly via terminal LSWP and front passenger door lock/unlock state signals are input to the ECU.
The main body ECU RH applies voltage to the door unlock detection switch via terminal LSWP. When the door unlock detection switch is on (there is continuity between the switch terminals), a lock state signal is input to the ECU. When the switch is off (there is no continuity between the switch terminals), an unlock state signal is input.
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.READ VALUE OF DATA LIST (DOOR UNLOCK DETECTION SWITCH) |
Check the DATA LIST to ensure proper function of the door unlock detection switch.
| Item | Measurement Item / Display (Range) | Normal Condition | Diagnostic Note |
| Passenger Lock Position SW | Passenger side door lock position switch signal /ON or OFF | ON: Passenger side door lock is in UNLOCK position OFF: Passenger side door lock is in LOCK position | - |
- OK:
- The display is as specified in the normal condition column.
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| OK | ||
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| 2.INSPECT FRONT DOOR LOCK ASSEMBLY (DOOR UNLOCK DETECTION SWITCH) |
LHD Models:
Remove the front door lock assembly RH.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection Measurement Condition Door Lock Condition (Specified Condition) 7 - 8 Battery positive (+) → Terminal 1
Battery negative (-) → Terminal 2LOCK 10 kΩ or higher 7 - 8 Battery positive (+) → Terminal 2
Battery negative (-) → Terminal 1UNLOCK Below 1 Ω
RHD Models:
Remove the front door lock assembly LH.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection Measurement Condition Door Lock Condition (Specified Condition) 7 - 8 (*1) Battery positive (+) → Terminal 4
Battery negative (-) → Terminal 3LOCK 10 kΩ or higher 7 - 8 (*1) Battery positive (+) → Terminal 3
Battery negative (-) → Terminal 4UNLOCK Below 1 Ω 7 - 8 (*2) Battery positive (+) → Terminal 4
Battery negative (-) → Terminal 1LOCK 10 kΩ or higher 7 - 8 (*2) Battery positive (+) → Terminal 1
Battery negative (-) → Terminal 4UNLOCK Below 1 Ω
*1: w/ Double locking system
*2: w/o Double locking system
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| OK | |
| 3.CHECK WIRE HARNESS (FRONT DOOR LOCK ASSEMBLY - MAIN BODY ECU RH) |
Disconnect the front door lock assembly connector.
Disconnect the ECU connector.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection
(Symbols)Condition Specified Condition L8-7 (LSSR) - J75-27 (LSWP) (*1) Always Below 1 Ω L8-8 (E) - Body ground (*1) Always Below 1 Ω M2-8 (LSSR) - J75-27 (LSWP) (*2) Always Below 1 Ω M2-7 (E) - Body ground (*2) Always Below 1 Ω
*1: LHD Models
*2: RHD Models
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| OK | ||
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