LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2004 >> GX 470 >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Power Door Lock Control System - Diagnosis >> Terminals Of Ecu

Terminals Of Ecu

  1. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSY (BODY ECU) 
Fig 1: Checking Instrument Panel Junction Block Assy (Body ECU)
G03476834Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Disconnect the IB, IE, IH, IK, IL, B3 and B5 J/B connectors, and check the voltage or continuity of each terminal of the wire harness side connectors.

    Standard: 

    TERMINAL SPECIFICATION

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    BDR1 (IE-9) <=> Body ground G-W <=> - Constant 10 - 14 V
    BECU (IB-4) <=> Body ground W-R <=> - Constant 10 - 14 V
    BECU (IL-4) <=> Body ground W-R <=> -
    GND1, 2 (IH-2) <=> Body ground W-B <=> - Constant Continuity
    KSW (B5-14) <=> Body ground G-Y <=> - No key inserted in ignition key cylinder --> With Key inserted No continuity --> Continuity
    L1 (IK-5) <=> Body ground L-W <=> - Door control switch (Passenger side) OFF --> LOCK No continuity --> Continuity
    UL1 (IK-1) <=> Body ground L-O <=> - Door control switch (Passenger side) OFF --> UNLOCK No continuity --> Continuity
    L2 (IK-3) <=> Body ground B-O <=> - Driver side door key cylinder OFF --> LOCK No continuity --> Continuity
    UL2 (B3-22) <=> Body ground G <=> - Driver side door key cylinder OFF --> UNLOCK No continuity --> Continuity

    If the result is not as specified, there may be a malfunction on the wire harness side.

  2. Reconnect the connectors, and check the voltage of each terminal of the connectors.

Standard: 

SYMBOLS (TERMINAL NO.) AND CONDITION SPECIFICATION

Symbols (Terminal No.) Wiring Color Condition Specified Condition
DCTY (B4-23) <=> Body ground R-Y <=> - Driver side door CLOSED --> OPEN 10 - 14 V --> Below 1 V
PCTY (B4-24) <=> Body ground R-Y <=> - Passenger side door CLOSED --> OPEN 10 - 14 V --> Below 1 V
RLCY (B4-11) <=> Body ground P-B <=> - Rear left door CLOSED --> OPEN 10 - 14 V --> Below 1 V
RRCY (B4-12) <=> Body ground P-L <=> - Rear right door CLOSED --> OPEN 10 - 14 V --> Below 1 V
BCTY (B4-7) <=> Body ground R-L <=> - Back door CLOSED --> OPEN 10 - 14 V --> Below 1 V
ACT+ (IL-9) <=> Body ground L-R <=> - Door control switch (master switch or passenger side switch) or door key cylinder (driver side) OFF --> LOCK Below 1 V --> 10 - 14 V --> Below 1 V
ACT+ (IL-6) <=> Body ground L-Y <=> -
ACT+ (IL-11) <=> Body ground L-R <=> -
ACT+ (IL-10) <=> Body ground L-R <=> -
ACT+ (IL-12) <=> Body ground L-R <=> -
ACT- (IL-18) <=> Body ground L-B <=> - Door control switch (master switch or passenger side switch) or door key cylinder (driver side) OFF --> LOCK Below 1 V --> 10 - 14 V --> Below 1 V
ACT- (IL-23) <=> Body ground L-B <=> -
ACT- (IL-22) <=> Body ground L-B <=> -
ACT- (IL-24) <=> Body ground L-B <=> -
ACTD (B3-10) <=> Body ground L-O <=> - Driver side door UNLOCK --> LOCK Below 1 V --> 10 - 14 V
LSWP (B3-30) <=> Body ground L-R <=> - Passenger side door UNLOCK --> LOCK Below 1 V --> 10 - 14 V
LSR (IL-16) <=> Body ground W <=> - Rear left door UNLOCK --> LOCK Below 1 V --> 10 - 14 V
LSR (IK-15) <=> Body ground W <=> - Rear right door UNLOCK --> LOCK Below 1 V --> 10 - 14 V
LSR (IK-16) <=> Body ground W <=> - Back door UNLOCK --> LOCK Below 1 V --> 10 - 14 V

If the result is not as specified, there may be a malfunction. In this case, check the harness, connector and fuse between the instrument panel junction block assy and battery. Then repair or replace it if necessary.

scientia non olet · About LEMON Manuals