Lexus IS250 IS220d GSE20 ALE20 - DOOR LOCK
READ VALUE OF DATA LIST (UNLOCK DETECTION SWITCH)
INSPECT REAR DOOR LOCK ASSEMBLY (UNLOCK DETECTION SWITCH)
CHECK WIRE HARNESS (REAR DOOR LOCK ASSEMBLY - MAIN BODY ECU RH)
POWER DOOR LOCK CONTROL SYSTEM - Rear Door UNLOCK Detection Switch LH Circuit
DESCRIPTION
The rear left side door unlock detection switch is built into the rear left side door lock assembly. The switch turns on when the rear left side door is locked and turns off when the door is unlocked.
The main body ECU RH is connected to the rear left side door lock assembly via terminal LSWL and rear left side 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 LSWL. 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 (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 |
| Rear Lock Position Switch | Rear door lock position switch signal /ON or OFF | ON: Rear door lock is in UNLOCK position OFF: Rear 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 REAR DOOR LOCK ASSEMBLY (UNLOCK DETECTION SWITCH) |
Remove the rear 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) 6 - 9 (*1) Battery positive (+) → Terminal 2
Battery negative (-) → Terminal 1Lock 10 kΩ or higher 6 - 9 (*1) Battery positive (+) → Terminal 1
Battery negative (-) → Terminal 2Unlock Below 1 Ω 6 - 9 (*2) Battery positive (+) → Terminal 4
Battery negative (-) → Terminal 1Lock 10 kΩ or higher 6 - 9 (*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 (REAR DOOR LOCK ASSEMBLY - MAIN BODY ECU RH) |
Disconnect the rear door lock assembly LH connector.
Disconnect the ECU (cowl side J/B RH) connector.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection
(Symbols)Condition Specified Condition O8-5 (LSSR) - RA-2 (*1) Always Below 1 Ω O8-6 (E) - Body ground (*1) Always Below 1 Ω O8-6 (LSSR) - RA-2 (*2) Always Below 1 Ω O8-9 (E) - Body ground (*2) Always Below 1 Ω
*1: w/ Double locking system
*2: w/o Double locking system
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| OK | ||
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