Lexus IS250 IS220d GSE20 ALE20 - DOOR LOCK
POWER DOOR LOCK CONTROL SYSTEM - TERMINALS OF ECU
| CHECK MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH) |
Disconnect the P1, J75, RA, RD, RJ, and RK J/B connectors.
Measure the voltage and resistance according to the value(s) in the table below.
| Symbols (Terminal No.) | Wiring Color | Terminal Description | Condition | Specified Condition |
| DCTY (P1-14) - Body ground | W - Body ground | Driver door courtesy switch | Driver door CLOSED → OPEN | 10 kΩ or higher → Below 1 Ω |
| RCTY (P1-16) - Body ground | O - Body ground | Rear right door courtesy switch input | Rear right door CLOSED → OPEN | 10 kΩ or higher → Below 1 Ω |
| PCTY (J75-23) - Body ground | B (*1), V (*2) - Body ground | Passenger door courtesy switch input | Passenger door CLOSED → OPEN | 10 kΩ or higher → Below 1 Ω |
| LCTY (RA-11) - Body ground | BR - Body ground | Rear left door courtesy switch input | Rear left door CLOSED → OPEN | 10 kΩ or higher → Below 1 Ω |
| GND2 (RD-7) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
| IG (RD-14) - Body ground | B - Body ground | Engine power supply | Engine switch on (IG) → off | 10 to 14 V → Below 1 V |
| GND1 (RD-17) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
| ACC (RD-27) - Body ground | O - Body ground | ACC power supply | Engine switch on (ACC) → off | 10 to 14 V → Below 1 V |
| L1 (RJ-7) - Body ground | BR - Body ground | Passenger door control switch LOCK input | Passenger door control switch OFF → LOCK | 10 kΩ or higher → Below 1 Ω |
| UL1 (RJ-10) - Body ground | B - Body ground | Passenger door control switch UNLOCK input | Passenger door control switch OFF → UNLOCK | 10 kΩ or higher → Below 1 Ω |
| BECU (RK-5) - Body ground | G-R - Body ground | +B (BECU) power supply | Always | 10 to 14 V |
*1: LHD Models
*2: RHD Models
If the result is not as specified, there may be a malfunction on the wire harness side.
Reconnect the J/B connectors.
Measure the voltage according to the value(s) in the table below.
| Symbols (Terminal No.) | Wiring Color | Terminal Description | Condition | Specified Condition |
| LSWL (RA-2) - Body ground | R - Body ground | Rear left door lock position switch input | Rear left door UNLOCK → LOCK | Below 1 V → 10 to 14 V (or pulse generation) |
| GSW (RA-7) - GND | L - Body ground | Center airbag sensor signal | Engine switch on (IG) | 4.5 to 5.5 V |
| ACTD (P1-4) - Body ground | L (*1), LG (*2) - Body ground | Door lock motor UNLOCK drive output (Driver door) | Door control switch (Master switch or passenger side switch) or driver side door key cylinder OFF → UNLOCK → OFF | Below 1 V → 10 to 14 V → Below 1 V |
| ACT+ (RJ-9) - Body ground | L - Body ground | Door lock motor LOCK drive output (All doors) | Door control switch (Master switch or passenger side switch) or driver side door key cylinder OFF → LOCK → OFF | Below 1 V → 10 to 14 V → Below 1 V |
| ACT- (RJ-17) - Body ground | LG - Body ground | Door lock motor UNLOCK drive output (All doors) | Door control switch (Master switch or passenger side switch) or driver side door key cylinder OFF → UNLOCK → OFF | Below 1 V → 10 to 14 V → Below 1 V |
| LSWR (J75-5) - Body ground | V - Body ground | Rear right door lock position switch input | Rear right door UNLOCK → LOCK | Below 1 V → 10 to 14 V (or pulse generation) |
| LSWP (J75-27) - Body ground | W - Body ground | Passenger door lock position switch input | Passenger door UNLOCK → LOCK | Below 1 V → 10 to 14 V (or pulse generation) |
If the result is not as specified, the main body ECU RH (cowl side J/B RH) may have a malfunction.
| CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY |
Disconnect the M7 switch connector.
Measure the voltage and resistance according to the value(s) in the table below.
| Symbols (Terminal No.) | Wiring Color | Terminal Description | Condition | Specified Condition |
| CPUB (M7-9) - GND (M7-2) | G - W-B | Battery power supply | Always | 10 to 14 V |
| BDR (M7-10) - GND (M7-2) | L - W-B | Battery power supply | Always | 10 to 14 V |
| SIG (M7-20) - GND (M7-2) | B - W-B | SIG power supply | Engine switch on (IG) → off | 10 to 14 V → Below 1 V |
| GND (M7-2) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
| KL (M7-4) - GND (M7-2) | L - W-B | Door key-linked door lock input | Using key, operate driver door lock cylinder to LOCK → UNLOCK | Below 1 Ω → 10 kΩ or higher |
| KUL (M7-14) - GND (M7-2) | W - W-B | Door key-linked door unlock input | Using key, operate driver door lock cylinder to LOCK → UNLOCK | Below 1 Ω → 10 kΩ or higher |
| LSW (M7-16) - GND (M7-2) | SB - W-B | Driver side door lock position switch input | Driver side door is unlocked → locked | Below 1 Ω → 10 kΩ or higher |
If the result is not as specified, there may be a malfunction on the wire harness side.
| CHECK DOUBLE DOOR LOCK ECU |
Disconnect the P34 ECU connector.
Measure the voltage and resistance according to the value(s) in the table below.
| Symbols (Terminal No.) | Wiring Color | Terminal Description | Condition | Specified Condition |
| +B (P34-1) - Body ground | R - Body ground | Battery power supply | Always | 10 to 14 V |
| CPUB (P34-7) - Body ground | LG - Body ground | Battery power supply | Always | 10 to 14 V |
| GND (P34-14) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
| MPX1 (P34-9) - Body ground | LG - Body ground | BEAN signal input/output | Always | 10 kΩ or higher |
If the result is not as specified, there may be a malfunction on the wire harness side.
Reconnect the P34 ECU connector.
Measure the voltage according to the value(s) in the table below.
| Symbols (Terminal No.) | Wiring Color | Terminal Description | Condition | Specified Condition |
| DLPD (P34-5) - Body ground | SB - Body ground | Front RH double lock position switch input | Double lock UNSET → SET | 5 V or higher → Below 1 V |
| DLPP (P34-6) - Body ground | GR - Body ground | Front LH double lock position switch input | Double lock UNSET → SET | 5 V or higher → Below 1 V |
| DLPR (P34-11) - Body ground | L - Body ground | Rear RH double lock position switch input | Double lock UNSET → SET | 5 V or higher → Below 1 V |
| DLPL (P34-12) - Body ground | Y - Body ground | Rear LH double lock position switch input | Double lock UNSET → SET | 5 V or higher → Below 1 V |
| ACTS (P34-3) - Body ground | V - Body ground | All door double lock motor set on output | Double lock UNSET → SET | Below 1 V → 10 to 14 V |
| ACTR (P34-4) - Body ground | P - Body ground | All door double lock motor set off output | Double lock SET → UNSET | Below 1 V → 10 to 14 V |
If the result is not as specified, the ECU may have a malfunction.
LEXUS IS250, IS220d / GSE20 ALE20