Pin Voltage Tests
WARNING: This page is about a different car, the 2002 Lexus LX 470. 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 (instrument ECU) harness connector unless otherwise specified. See CONNECTOR IDENTIFICATION . See BODY ECU (INSTRUMENT ECU) PIN VOLTAGE CHART table.
BODY ECU (INSTRUMENT ECU) PIN VOLTAGE CHART
| Terminal No. (Symbol), Wire Color | Condition | STD Voltage |
|---|---|---|
| I19-1 (KYIL) - I21-4 (GND1), Sky Blue - Sky Blue | Each Door Is Opened | Below 1 Volt |
| I19-1 (KYIL) - I21-4 (GND1), Sky Blue - Sky Blue | All Doors Are Closed | 10-14 Volts |
| I19-2 (FRRM) - I21-4 (GND1), Sky Blue - Sky Blue | Each Door Is Opened | Below 2 Volts |
| I19-2 (FRRM) - I21-4 (GND1), Sky Blue - Sky Blue | All Doors Are Closed | 10-14 Volts |
| I19-3 (PCY) - I21-4 (GND1), Sky Blue - Sky Blue | Passenger Door Closed | 10-14 Volts |
| I19-3 (PCY) - I21-4 (GND1), Sky Blue - Sky Blue | Passenger Door Opened | Below 1 Volt |
| I19-4 (DMU) - I21-4 (GND1), Sky Blue - Sky Blue | Driver Door Lock Control Switch Position OFF | 10-14 Volts |
| I19-4 (DMU) - I21-4 (GND1), Sky Blue - Sky Blue | Driver Door Lock Control Switch Position LOCK | Below 1 Volt |
| I19-5 (PMU) - I21-4 (GND1), Sky Blue - Sky Blue | Passenger Door Lock Control Switch Position OFF | 10-14 Volts |
| I19-5 (PMU) - I21-4 (GND1), Sky Blue - Sky Blue | Passenger Door Lock Control Switch Position LOCK | Below 1 Volt |
| I19-6 (DKL) - I21-4 (GND1), Sky Blue - Sky Blue | Driver Door Key Lock & Unlock Switch Position Is OFF | Below 1 Volt |
| I19-6 (DKL) - I21-4 (GND1), Sky Blue - Sky Blue | Driver Door Key Lock & Unlock Switch Position Is LOCK | 10-14 Volts |
| I19-7 (PKL) - I21-4 (GND1), Sky Blue - Sky Blue | Passenger Door Key Lock & Unlock Switch Position Is OFF | Below 1 Volts |
| I19-7 (PKL) - I21-4 (GND1), Sky Blue - Sky Blue | Passenger Door Key Lock & Unlock Switch Position Is LOCK | 10-14 Volts |
| I19-8 (DML) - I21-4 (GND1), Sky Blue - Sky Blue | Driver Door Lock Control Switch Position LOCK | Below 1 Volt |
| I19-9 (PML) - I21-4 (GND1), Sky Blue - Sky Blue | Passenger Door Lock Control Switch Position OFF | 10-14 Volts |
| I19-9 (PML) - I21-4 (GND1), Sky Blue - Sky Blue | Passenger Door Lock Control Switch Position LOCK | Below 1 Volt |
| I19-10 (PKU) - I21-4 (GND1), Sky Blue - Sky Blue | Passenger Door Key Lock & Unlock Switch Position Is OFF | Below 1 Volt |
| I19-10 (PKU) - I21-4 (GND1), Sky Blue - Sky Blue | Passenger Door Key Lock & Unlock Switch Position Is UNLOCK | 10-14 Volts |
| I19-11 (DKU) - I21-4 (GND1), Sky Blue - Sky Blue | Driver Door Key Lock & Unlocked Switch Position Is OFF | Below 1 Volt |
| I19-11 (DKU) - I21-4 (GND1), Sky Blue - Sky Blue | Driver Door Key Lock & Unlock Switch Position Is UNLOCK | 10-14 Volts |
| I19-13 (HW) - I21-4 (GND1), Sky Blue - Sky Blue | Constant | 10-14 Volts |
| I19-14 (DCY) - I21-4 (GND1), Sky Blue - Sky Blue | Driver Door Closed | 10-14 Volts |
| I19-14 (DCY) - I21-4 (GND1), Sky Blue - Sky Blue | Driver Door Opened | Below 1 Volt |
| I19-15 (HRY) - I21-4 (GND1), Sky Blue - Sky Blue | Ignition Switch Position Is ON, Light Control Switch HEAD Position | Below 2 Volts |
| I19-15 (HRY) - I21-4 (GND1), Sky Blue - Sky Blue | Ignition Switch Position Is ON, Light Control Switch OFF Position | 10-14 Volts |
| I19-16 (C1) - I21-4 (GND1), Sky Blue - Sky Blue | Rear Wiper SW Position Is OFF | 10-14 Volts |
| I19-16 (C1) - I21-4 (GND1), Sky Blue - Sky Blue | Rear Wiper SW Position Is INT, AUTO | Below 1 Volt |
| I19-16 (C1) - I21-4 (GND1), Sky Blue - Sky Blue | Rear Wiper SW Position Is LO | 10-14 Volts |
| I19-16 (C1) - I21-4 (GND1), Sky Blue - Sky Blue | Rear Wiper SW Position Is HI | 10-14 Volts |
| I19-17 (L) - I21-4 (GND1), Sky Blue - Sky Blue | Rear Wiper SW Position Is OFF | 10-14 Volts |
| I19-17 (L) - I21-4 (GND1), Sky Blue - Sky Blue | Rear Wiper SW Position Is INT, AUTO | 10-14 Volts |
| I19-17 (L) - I21-4 (GND1), Sky Blue - Sky Blue | Rear Wiper SW Position Is LO | 10-14 Volts |
| I19-17 (L) - I21-4 (GND1), Sky Blue - Sky Blue | Rear Wiper SW Position Is HI | Below 1 Volt |
| I19-18 (TAIL) - I21-4 (GND1), Sky Blue - Sky Blue | Headlight Control Switch Position Is TAIL | Below 1 Volt |
| I19-18 (TAIL) - I21-4 (GND1), Sky Blue - Sky Blue | Headlight Control Switch Position Is Except TAIL | 10-14 Volts |
| I19-19 (HEAD) - I21-4 (GND1), Sky Blue - Sky Blue | Headlight Control Switch Position Is HEAD | Below 1 Volt |
| I19-19 (HEAD) - I21-4 (GND1), Sky Blue - Sky Blue | Headlight Control Switch Position Is Except HEAD | 10-14 Volts |
| I19-20 (KSW) - I21-4 (GND1), Sky Blue - Sky Blue | Key Is Inserted | Below 1 Volt |
| I19-20 (KSW) - I21-4 (GND1), Sky Blue - Sky Blue | Key Is Not Inserted | 10-14 Volts |
| I19-21 (ACC) - I21-4 (GND1), Sky Blue - Sky Blue | Ignition Switch Position Is ACC | 10-14 Volts |
| I20-18 (DISW) - I21-4 (GND1), Sky Blue - Sky Blue | Driver Door Is Locked | 10-14 Volts |
| I20-18 (DISW) - I21-4 (GND1), Sky Blue - Sky Blue | Driver Door Is Unlocked | Below 1 Volt |
| I20-1 (RRCY) - I21-4 (GND1), Sky Blue - Sky Blue | Rear RH Door Is Opened | Below 1 Volt |
| I20-1 (RRCY) - I21-4 (GND1), Sky Blue - Sky Blue | Rear RH Door Is Closed | 10-14 Volts |
| I20-2 (STP) - I21-4 (GND1), Sky Blue - Sky Blue | Brake Is ON | 10-14 Volts |
| I20-2 (STP) - I21-4 (GND1), Sky Blue - Sky Blue | Brake Is OFF | Below 1 Volt |
| I20-6 (PISW) - I21-4 (GND1), Sky Blue - Sky Blue | Passenger Door Is Locked | 10-14 Volts |
| I20-6 (PISW) - I21-4 (GND1), Sky Blue - Sky Blue | Passenger Door Is Unlocked | Below 1 Volt |
| I20-7 (M1) - I21-4 (GND1), Sky Blue - Sky Blue | Memory Switch 1 Position Is OFF | 10-14 Volts |
| I20-7 (M1) - I21-4 (GND1), Sky Blue - Sky Blue | Memory Switch 1 Position Is ON | Below 1 Volt |
| I20-8 (MEMO) - I21-4 (GND1), Sky Blue - Sky Blue | Set Switch Position Is OFF | 10-14 Volts |
| I20-8 (MEMO) - I21-4 (GND1), Sky Blue - Sky Blue | Set Switch Position Is ON | Below 1 Volt |
| I20-10 (RLCL) - I21-4 (GND1), Sky Blue - Sky Blue | Constant | 10-14 Volts |
| I20-12 (DURY) - I21-4 (GND1), Sky Blue - Sky Blue | Constant | 10-14 Volts |
| I20-13 (DDRY) - I21-4 (GND1), Sky Blue - Sky Blue | Constant | 10-14 Volts |
| I20-15 (FRCL) - I21-4 (GND1), Sky Blue - Sky Blue | Constant | 10-14 Volts |
| I20-17 (M2) - I21-4 (GND1), Sky Blue - Sky Blue | Memory Switch 2 Position is OFF | 10-14 Volts |
| I20-17 (M2) - I21-4 (GND1), Sky Blue - Sky Blue | Memory Switch 2 Position Is ON | Below 1 Volt |
| I21-1 (BECU) - I21-4 (GND1), Sky Blue - Sky Blue | Constant | 10-14 Volts |
| I21-2 (SIG) - I21-4 (GND1), Sky Blue - Sky Blue | Ignition Switch Position Is ON | 10-14 Volts |
| I21-3 (WLRY) - I21-4 (GND1), Sky Blue - Sky Blue | Ignition Switch Position Is ON | 10-14 Volts |
| I21-4 (GND1) - Body Ground, Sky Blue - Body Ground | Constant | Below 1 Volt |
| I21-6 (PWRY) - Body Ground, Sky Blue - Body Ground | Constant | Below 1 Volt |
| I21-7 (RLCY) - I21-4 (GND1), Sky Blue - Sky Blue | Rear LH Door & Back Door Is Open | Below 1 Volt |
| I21-7 (RLCY) - I21-4 (GND1), Sky Blue - Sky Blue | Rear LH Door & Back Door Is Closed | 10-14 Volts |
| I21-8 (LMRY) - I21-4 (GND1), Sky Blue - Sky Blue | Constant | 10-14 Volts |
| I21-9 (TRY) - I21-4 (GND1), Sky Blue - Sky Blue | Ignition Switch Position is ON, Light Control Switch OFF Position | 10-14 Volts |
| I21-11 (DLRY) - I21-4 (GND1), Sky Blue - Sky Blue | Constant | 10-14 Volts |
| I21-12 (LS/M) - I21-4 (GND1), Sky Blue - Sky Blue | During Rear Wiper Operation | Below 1 Volt |
| I21-12 (LS/M) - I21-4 (GND1), Sky Blue - Sky Blue | When Rear Wipers Are At Stop | 10-14 Volts |
| I21-14 (INDP) - I21-4 (GND1), Sky Blue - Sky Blue | Shift Position Is "P" Position | Below 1 Volt |
| I21-14 (INDP) - I21-4 (GND1), Sky Blue - Sky Blue | Shift Position Is Except "P" Position | 10-14 Volts |