Pin Voltage Tests
WARNING: This page is about a different car, the 2003 Lexus IS 300 and 2002 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
There is a 12-pin driver side junction block-to-body ECU connector that is ONLY accessible after separation from the junction block.
Using a DVOM connected to ground, backprobe to measure voltage or resistance at appropriate terminal at body ECU harness connector unless otherwise specified. See CONNECTOR IDENTIFICATION . See BODY ECU PIN VOLTAGE CHART table.
BODY ECU PIN VOLTAGE CHART
| Terminal No. (Symbol), Wire Color | Condition | Standard Voltage | ||||
|---|---|---|---|---|---|---|
| 1 (BSUB) - 12 (GND) | Constant | 10-14 Volts | ||||
| 2 (BECU) - 12 (GND) | Constant | 10-14 Volts | ||||
| 3 (IG) - 12 (GND) | Ignition Switch Position Is LOCK Or ACC | Less Than 1 Volt | ||||
| 3 (IG) - 12 (GND) | Ignition Switch Position Is ON | 10-14 Volts | ||||
| 4 (ACC) - 12 (GND) | Ignition Switch Position Is LOCK | Less Than 1 Volt | ||||
| 4 (ACC) - 12 (GND) | Ignition Switch Position Is ACC | 10-14 Volts | ||||
| 5 (DFG) - 12 (GND) | Defogger Switch Position Is ON | Less Than 1 Volt | ||||
| 6 (MPX3) | Multiplex Communication Circuit | ..... | ||||
| 7 (MPX1) - B6-5 (MPX2), Orange | Multiplex Communication Circuit | ..... | ||||
| 8 (ILE) - 12 (GND) | Each Interior Light Switch ON | Less Than 1 Volt | ||||
| 9 (ACT+) - 10 (ACT-) | Door Lock Operating | 10-14 Volts | ||||
| 11 (BCTY) - 12 (GND) | Driver Door Opened | Less Than 1 Volt | ||||
| 11 (BCTY) - 12 (GND) | Driver Door Closed | 10-14 Volts | ||||
| 12 (GND) - Body Ground | Constant | Less Than 1 Volt | ||||
| B5-1 (PRG) - B5-2 (RDA), Red/Black - Gray/Blue | Wireless Door Lock Receiver Communication Circuit | ..... | ||||
| B5-3 (DBKL) - B6-19 (GND2), Pink/Black - White/Black | With Seat Belt ON | Less Than 1 Volt | ||||
| B5-3 (DBKL) - B6-19 (GND2), Pink/Black - White/Black | No Seat Belt ON | 10-14 Volts | ||||
| B5-4 (LSR) - B6-19 (GND2), Blue/Red - White/Black | Rear Door Is Unlocked | Less Than 1 Volt | ||||
| B5-4 (LSR) - B6-19 (GND2), Blue/Red - White/Black | Rear Door Is Locked | Approx. 5.7 Volts | ||||
| B5-5 (RCTY) - B6-19 (GND2), Red/Blue - White/Black | Rear Door Opened | Less Than 1 Volt | ||||
| B5-5 (RCTY) - B6-19 (GND2), Red/Blue - White/Black | Rear Door Closed | 10-14 Volts | ||||
| B5-6 (DCTY) - B6-19 (GND2), Red/Green - White/Black | Driver Door Opened | Less Than 1 Volt | ||||
| B5-6 (DCTY) - B6-19 (GND2), Red/Green - White/Black | Driver Door Closed | 10-14 Volts | ||||
| B5-7 (LGCY) - Body Ground, Red/Yellow (1) | Luggage Door Closed | 10-14 Volts | ||||
| B5-7 (LGCY) - Body Ground, Red/Yellow (1) | Luggage Door Opened | Less Than 1 Volt | ||||
| B7-7 (LGCY) - B6-19 (GND2), Red/Yellow - White/Black (2) | Back Door Opened | Less Than 1 Volt | ||||
| B7-7 (LGCY) - B6-19 (GND2), Red/Yellow - White/Black (2) | Back Door Closed | 10-14 Volts | ||||
| B5-8 (TR+) - B6-19 (GND2), Blue/White - White/Black (1) | Luggage Compartment Door Opener Switch Is Not Operated | 10-14 Volts | ||||
| B5-8 (TR+) - B6-19 (GND2), Blue/White - White/Black (1) | Luggage Compartment Door Opener Switch Is Operated | Less Than 1 Volt | ||||
| B7-8 (TR+) - B6-19 (GND2), Blue/White - White/Black (2) | Back Door Opener Switch Is Operated | Less Than 1 Volt | ||||
| B7-8 (TR+) - B6-19 (GND2), Blue/White - White/Black (2) | Back Door Opener Switch Is Not Operated | 10-14 Volts | ||||
| B5-9 (RLU) - B6-19 (GND2), Red - White/Black | Rear Left Side Power Window UP Operation | Less Than 1 Volt | ||||
| B5-10 (RLD) - B6-19 (GND2), Green/Black - White/Black | Rear Left Side Power Window DOWN Operation | Less Than 1 Volt | ||||
| B5-14 (FR) - B5-13 (FE), Yellow/Red - Brown/White | Ignition Switch Position ON & Fuel Sender Gauge Position Float UP | Approx. 0.5 Volt | ||||
| B5-14 (FR) - B5-13 (FE), Yellow/Red - Brown/White | Ignition Switch Position ON & Fuel Sender Gauge Position Float DOWN | Approx. 0.5 Volt | ||||
| B6-1 (OBDII) - B6-19 (GND2), White - White/Black | OBDII Communication Circuit | ..... | ||||
| B6-2 (TAIL) - B6-19 (GND2), Green - White/Black | Light Control Switch Position Is TAIL Or HEAD | Less Than 1 Volt | ||||
| B6-2 (TAIL) - B6-19 (GND2), Green - White/Black | Light Control Switch Position Is OFF | 10-14 Volts | ||||
| B6-3 (RRU) - B6-19 (GND2), Red/Yellow - White/Black | Rear Right Side Power Window UP Operation | Less Than 1 Volt | ||||
| B6-4 (RRD) - B6-19 (GND2), Green/Yellow - White/Black | Rear Right Side Power Window DOWN Operation | Less Than 1 Volt | ||||
| B6-6 (KSW) - B6-19 (GND2), Black/Yellow - White/Black | Key Is Inserted | Less Than 1 Volt | ||||
| B6-6 (KSW) - B6-19 (GND2), Black/Yellow - White/Black | Key Is Not Inserted | 10-14 Volts | ||||
| B6-7 (PML) - B6-19 (GND2), Green/Red - White/Black | Door Lock Control SW Is LOCK | 10-14 Volts | ||||
| B6-7 (PML) - B6-19 (GND2), Green/Red - White/Black | Door Lock Control SW Is OFF Or UNLOCK | Less Than 1 Volt | ||||
| B6-8 (PCTY) - B6-19 (GND2), Red/Black - White/Black | Passenger Door Opened | Less Than 1 Volt | ||||
| B6-8 (PCTY) - B6-19 (GND2), Red/Black - White/Black | Passenger Door Closed | 10-14 Volts | ||||
| B6-9 (PMUL) - B6-19 (GND2), Green/Black - White/Black | Door Lock Control SW Is OFF Or UNLOCK | Less Than 1 Volt | ||||
| B6-9 (PMUL) - B6-19 (GND2), Green/Black - White/Black | Door Lock Control SW Is LOCK | 10-14 Volts | ||||
| B6-10 (HAZ) - B6-19 (GND2), Green/White - White/Black | Hazard Warning Switch Position Is ON | Less Than 1 Volt | ||||
| B6-11 (DCLP) - B6-19 (GND2), Red/Green - White/Black | Each Interior Light Switch ON | Less Than 1 Volt | ||||
| B6-12 (PCLP) - B6-19 (GND2), Red - White/Black | Each Interior Light Switch ON | Less Than 1 Volt | ||||
| B6-13 (BDSU) - B6-19 (GND2), Black/Red - White/Black | Back Door Opener Switch ON | Less Than 1 Volt | ||||
| B6-13 (BDSU) - B6-19 (GND2), Black/Red - White/Black | Back Door Opener Switch OFF | 10-14 Volts | ||||
| B6-14 (LSWP) - B6-19 (GND2), Blue/Red - White/Black | Passenger Door Is Unlocked | Less Than 1 Volt | ||||
| B6-14 (LSWP) - B6-19 (GND2), Blue/Red - White/Black | Passenger Door Is Locked | 10-14 Volts | ||||
| B6-16 (BZR) - B6-15 (BZR2), Blue/Yellow - Blue/Orange | Buzzer Is Sounded | 8-10 Volts | ||||
| B6-16 (BZR) - B6-15 (BZR2), Blue/Yellow - Blue/Orange | Buzzer Is Not Sounded | Less Than 1 Volt | ||||
| B6-17 (PU) - B6-19 (GND2), Yellow/Black - White/Black | Front Left Side Power Window UP Operation | Less Than 1 Volt | ||||
| B6-18 (PD) - B6-19 (GND2), Blue/White - White/Black | Front Left Side Power Window DOWN Operation | Less Than 1 Volt | ||||
| B6-19 (GND2) - Body Ground, White/Black | Constant | Less Than 1 Volt | ||||
| B6-20 (ACTD) - 9 (ACT+), Red/White | Driver Door Is Operating | 10-14 Volts | ||||
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