Pin Voltage Tests
WARNING: This page is about a different car, the 2002 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.
Using a DVOM connected to ground, backprobe to measure voltage or resistance at appropriate terminal at body ECU harness connector unless otherwise specified. See BODY ECU PIN VOLTAGE CHART table.
BODY ECU PIN VOLTAGE CHART
| Terminal No. (Symbol), Wiring Color | Condition | Standard Voltage |
|---|---|---|
| B8-2 (GND2) - Body Ground, White/Black | Constant | Less Than 1 Volt |
| B8-4 (BSUB) - B5-9, B8-2 (GND 1, 2), Blue/Black - White/Black | Constant | 10-14 Volts |
| B8-5 (IG) - B5-9, B8-2 (GND 1, 2), Red/Blue - White/Black | Ignition Switch ACC Or OFF | Less Than 1 Volt |
| B8-5 (IG) - B5-9, B8-2 (GND 1, 2), Red/Blue - White/Black | Ignition Switch ON | 10-14 Volts |
| B8-6 (FFGO) - B5-9, B8-2 (GND 1, 2), Brown/White - White/Black | Fog Light Switch OFF | 10-14 Volts |
| B8-6 (FFGO) - B5-9, B8-2 (GND 1, 2), Brown/White - White/Black | Fog Light Switch ON | Less Than 1 Volt |
| B8-7 (TRLY) - B5-9, B8-2 (GND 1, 2), Green/White - White/Black | Ignition Switch ON, Light Control Switch OFF | 10-14 Volts |
| B8-7 (TRLY) - B5-9, B8-2 (GND 1, 2), Green/White - White/Black | Ignition Switch ON, Light Control Switch TAIL | Less Than 1 Volt |
| B8-11 (HAZ) - B5-9, B8-2 (GND 1, 2), Light Green/Black - White/Black | Hazard Warning Switch OFF | 10-14 Volt |
| B8-11 (HAZ) - B5-9, B8-2 (GND 1, 2), Light Green/Black - White/Black | Hazard Warning Switch ON | Less Than 1 Volt |
| B8-15 (SNOW) - B5-9, B8-2 (GND 1, 2), Yellow/Black - White/Black | Pattern Select Switch SNOW | Less Than 1 Volt |
| B8-15 (SNOW) - B5-9, B8-2 (GND 1, 2), Yellow/Black - White/Black | Pattern Select Switch Except SNOW, Ignition Switch ON | 10-14 Volts |
| B8-16 (IND) - B5-9, B8-2 (GND 1, 2), Blue - White/Black | Security Indicator Light Lights Up | 3-6 Volts |
| B8-16 (IND) - B5-9, B8-2 (GND 1, 2), Blue - White/Black | Security Indicator Light Does Not Light Up | Less Than 1 Volt |
| B8-17 (DFG) - B5-9, B8-2 (GND 1, 2), Gray/Red - White/Black | Rear Defogger Switch OFF | 10-14 Volts |
| B8-17 (DFG) - B5-9, B8-2 (GND 1, 2), Gray/Red - White/Black | Rear Defogger Switch ON | Less Than 1 Volt |
| B8-18 (ACC) - B5-9, B8-2 (GND 1, 2), Gray - White/Black | Ignition Switch OFF | Less Than 1 Volt |
| B8-18 (ACC) - B5-9, B8-2 (GND 1, 2), Gray - White/Black | Ignition Switch ACC | 10-14 Volts |
| B7-2 (BZR2) - B7-3 (BZR), Gray - Light Green | Wireless Door Lock Buzzer Sounded | 10-14 Volts |
| B7-2 (BZR2) - B7-3 (BZR), Gray - Light Green | Wireless Door Lock Buzzer Not Sounded | Less Than 1 Volt |
| B7-5 (BCTY) - B5-9, B8-2 (GND 1, 2), White/Red - White/Black | Back Door Courtesy Switch OFF (Closed) | 10-14 Volt |
| B7-5 (BCTY) - B5-9, B8-2 (GND 1, 2), White/Red - White/Black | Back Door Courtesy Switch ON (Open) | Less Than 1 Volt |
| B7-6 (HCTY) - B5-9, B8-2 (GND 1, 2), Red/White - White/Black | Hood Courtesy Switch OFF (Closed) | 10-14 Volts |
| B7-6 (HCTY) - B5-9, B8-2 (GND 1, 2), Red/White - White/Black | Hood Courtesy Switch ON (Open) | Less Than 1 Volt |
| B7-7 (DBKL) - B5-9, B8-2 (GND 1, 2), Green/White - White/Black | Driver's Seat Belt Buckle Switch OFF (Belt Fastened) | 10-14 Volts |
| B7-7 (DBKL) - B5-9, B8-2 (GND 1, 2), Green/White - White/Black | Driver's Seat Belt Buckle Switch ON (Belt Unfastened) | Less Than 1 Volt |
| B7-8 (KSW) - B5-9, B8-2 (GND 1, 2), Blue - White/Black | Ignition Key Inserted | Less Than 1 Volt |
| B7-8 (KSW) - B5-9, B8-2 (GND 1, 2), Blue - White/Black | Ignition Key Not Inserted | 10-14 Volts |
| B7-9 (HR) - B5-9, B8-2 (GND 1, 2), Blue/Orange - White/Black | Ignition Switch ON & Blower Motor Does Not Operate | 10-14 Volts |
| B7-9 (HR) - B5-9, B8-2 (GND 1, 2), Blue/Orange - White/Black | Ignition Switch ON & Blower Motor Operates | Less Than 1 Volt |
| B7-10 (ILE) - B5-9, B8-2 (GND 1, 2), Red/Yellow - White/Black | Each Door Open | Below 2 Volts |
| B7-10 (ILE) - B5-9, B8-2 (GND 1, 2), Red/Yellow - White/Black | All Doors Closed | 10-14 Volts |
| B7-12 (RWLS) - B5-9, B8-2 (GND 1, 2), Red/Blue - White/Black | Ignition Switch ON, Rear Wiper Switch OFF, WASH1 Or INT | 10-14 Volts |
| B7-12 (RWLS) - B5-9, B8-2 (GND 1, 2), Red/Blue - White/Black | Ignition Switch ON, Rear Wiper Switch ON Or WASH2 | Less Than 1 Volt |
| B7-13 (RWW) - B5-9, B8-2 (GND 1, 2), Blue/Yellow - White/Black | Ignition Switch ON, Rear Wiper Switch OFF, ON Or INT | 10-14 Volts |
| B7-13 (RWW) - B5-9, B8-2 (GND 1, 2), Blue/Yellow - White/Black | Ignition Switch ON, Rear Wiper Switch WASH1 Or 2 | Less Than 1 Volt |
| B7-18 (STPI) - B5-9, B8-2 (GND 1, 2), Green/Orange - White/Black | Stop Light Switch OFF | Less Than 1 Volts |
| B7-18 (STPI) - B5-9, B8-2 (GND 1, 2), Green/Orange - White/Black | Stop Light Switch ON | 10-14 Volts |
| B7-19 (PKB) - B5-9, B8-2 (GND 1, 2), Red/Black - White/Black | Ignition Switch ON, PKB Switch OFF | 10-14 Volts |
| B7-19 (PKB) - B5-9, B8-2 (GND 1, 2), Red/Black - White/Black | Ignition Switch ON, PKB Switch ON | Less Than 1 Volt |
| B7-20 (HF) - B5-9, B8-2 (GND 1, 2), Red - White/Black | Headlight Dimmer Switch LOW Or HI | 10-14 Volts |
| B7-20 (HF) - B5-9, B8-2 (GND 1, 2), Red - White/Black | Headlight Dimmer Switch FLASH | Less Than 1 Volt |
| B7-21 (RWC1) - B5-9, B8-2 (GND 1, 2), Red - White/Black | Ignition Switch ON, Rear Wiper Switch Except INT | 10-14 Volts |
| B7-21 (RWC1) - B5-9, B8-2 (GND 1, 2), Red - White/Black | Ignition Switch ON, Rear Wiper Switch INT | Less Than 1 Volt |
| B6-4 (A) - B5-9, B8-2 (GND 1, 2), Pink - White/Black | Light Control Switch Except AUTO | 10-14 Volts |
| B6-4 (A) - B5-9, B8-2 (GND 1, 2), Pink - White/Black | Light Control Switch Except AUTO | Less Than 1 Volt |
| B6-5 (HU) - B5-9, B8-2 (GND 1, 2), Red/White - White/Black | Headlight Dimmer Switch LOW | 10-14 Volts |
| B6-5 (HU) - B5-9, B8-2 (GND 1, 2), Red/White - White/Black | Headlight Dimmer Switch HI Or FLASH | Less Than 1 Volt |
| B6-7 (FFOG) - B5-9, B8-2 (GND 1, 2), Green/Yellow - White/Black | Headlight Dimmer Switch LOW, Fog Light Switch OFF | 10-14 Volts |
| B6-7 (FFOG) - B5-9, B8-2 (GND 1, 2), Green/Yellow - White/Black | Headlight Dimmer Switch LOW, Fog Light Switch ON | Less Than 1 Volt |
| B6-10 (HORN) - B5-9, B8-2 (GND 1, 2), White/Red - White/Black | Horn Switch OFF | 10-14 Volts |
| B6-10 (HORN) - B5-9, B8-2 (GND 1, 2), White/Red - White/Black | Horn Switch ON | Less Than 1 Volt |
| B6-15 (RCO) - B5-9, B8-2 (GND 1, 2), Blue/Yellow - White/Black | Wireless Door Lock Is Operated | 4-5 Volts |
| B6-15 (RCO) - B5-9, B8-2 (GND 1, 2), Blue/Yellow - White/Black | Wireless Door Lock Is Not Operated | 4-5 - Less Than 1 Volt |
| B6-18 (BDSU) - B5-9, B8-2 (GND 1, 2), Light Green/Red - White/Black | Back Door Key Lock & Unlock Switch OFF Or LOCK | 10-14 Volts |
| B6-18 (BDSU) - B5-9, B8-2 (GND 1, 2), Light Green/Red - White/Black | Back Door Key Lock & Unlock Switch UNLOCK | Less Than 1 Volt |
| B6-19 (BDSL) - B5-9, B8-2 (GND 1, 2), Blue/White - White/Black | Back Door Key Lock & Unlock Switch OFF or UNLOCK | 10-14 Volts |
| B6-19 (BDSL) - B5-9, B8-2 (GND 1, 2), Blue/White - White/Black | Back Door Key Lock & Unlock Switch LOCK | Less Than 1 Volt |
| B5-1 (RDR+) - B5-9, B8-2 (GND 1, 2), Blue/Black - White/Black | Back Door Lock Motor Is Activated To Lock | Less Than 1 Volt |
| B5-1 (RDR+) - B5-9, B8-2 (GND 1, 2), Blue/Black - White/Black | Back Door Lock Motor Is Not Operated | 10-14 Volts |
| B5-2 (BECU) - B5-9, B8-2 (GND 1, 2), Green/Black - White/Black | Constant | 10-14 Volts |
| B5-3 (RWLM) - B5-9, B8-2 (GND 1, 2), Blue - White/Black | Rear Wiper Switch OFF | Less Than 1 Volt |
| B5-3 (RWLM) - B5-9, B8-2 (GND 1, 2), Blue - White/Black | Rear Wiper Switch ON, Ignition Switch ON | 10-14 Volts |
| B5-4 (RWIG) - B5-9, B8-2 (GND 1, 2), Blue/White - White/Black | Ignition Switch OFF | Less Than 1 Volt |
| B5-4 (RWIG) - B5-9, B8-2 (GND 1, 2), Blue/White - White/Black | Ignition Switch ON | 10-14 Volts |
| B5-5 (SH) - B5-9, B8-2 (GND 1, 2), Light Green/Black - White/Black | Anti-Theft System Is Set, Luggage Compartment Door Key Lock & Unlock Switch OFF; Luggage Compartment Door Open | Voltage Change 10-4 - Less Than 1 Volt |
| B5-6 (RDR) - B5-9, B8-2 (GND 1, 2), Blue/Red - White/Black | Back Door Lock Motor Is Activated To Unlock | Less Than 1 Volt |
| B5-6 (RDR) - B5-9, B8-2 (GND 1, 2), Blue/Red - White/Black | Back Door Lock Motor Is Not Operated | 10-14 Volts |
| B5-7 (RWSW) - B5-9, B8-2 (GND 1, 2), Blue/Orange - White/Black | Rear Wiper Operated | 10-14 Volts |
| B5-7 (RWSW) - B5-9, B8-2 (GND 1, 2), Blue/Orange - White/Black | Rear Wiper STOP | Less Than 1 Volt |
| B5-8 (WIG) - B5-9, B8-2 (GND 1, 2), Blue/Yellow - White/Black | Ignition Switch OFF | Less Than 1 Volt |
| B5-8 (WIG) - B5-9, B8-2 (GND 1, 2), Blue/Yellow - White/Black | Ignition Switch ON | 10-14 Volts |
| B5-9 (GND1) - Body Ground, White/Black | Constant | Less Than 1 Volt |
| B5-12 (HRLY) - B5-9, B8-2 (GND 1, 2), Red - White/Black | Light Control Switch OFF Or TAIL | 10-14 Volts |
| B5-12 (HRLY) - B5-9, B8-2 (GND 1, 2), Red - White/Black | Light Control Switch HEAD | Less Than 1 Volt |
| B5-14 (DRL) - B5-9, B8-2 (GND 1, 2), Green/Yellow - White/Black | Engine Running & PKB Switch OFF | Less Than 1 Volt |
| B5-14 (DRL) - B5-9, B8-2 (GND 1, 2), Green/Yellow - White/Black | Engine Running & PKB Switch ON Or Light Control Switch HEAD | 10-14 Volts |
| B5-15 (HEAD) - B5-9, B8-2 (GND 1, 2), Red/Blue - White/Black | Light Control Switch OFF Or TAIL | 10-14 Volts |
| B5-15 (HEAD) - B5-9, B8-2 (GND 1, 2), Red/Blue - White/Black | Light Control Switch HEAD | Less Than 1 Volt |
| B5-16 (TAIL) - B5-9, B8-2 (GND 1, 2), Green/Red - White/Black | Light Control Switch OFF | 10-14 Volts |
| B5-16 (TAIL) - B5-9, B8-2 (GND 1, 2), Green/Red - White/Black | Light Control Switch TAIL Or HEAD | Less Than 1 Volt |
| B5-17 (LSWA) - B5-9, B8-2 (GND 1, 2), Gray - White/Black | Back Door Locked | 10-14 Volts |
| B5-17 (LSWA) - B5-9, B8-2 (GND 1, 2), Gray - White/Black | Back Door Unlocked | Less Than 1 Volt |