Lexus RX300 (MCU15). Manual - part 334
DI–568
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DIAGNOSTICS
BODY CONTROL SYSTEM
LEXUS RX300 (RM785E)
RWLS ↔ GND1, 2
R L ↔ W B
Ignition switch ON, rear wiper switch OFF, WASH1 or INT
10 – 14
RWLS ↔ GND1, 2
(B7–12 ↔ B5–9, B8–2)
R–L ↔ W–B
Ignition switch ON, rear wiper switch ON or WASH2
Below 1.0
RWW ↔ GND1, 2
L Y ↔ W B
Ignition switch ON, rear wiper switch OFF, ON or INT
10 – 14
RWW ↔ GND1, 2
(B7–13 ↔ B5–9, B8–2)
L–Y ↔ W–B
Ignition switch ON, rear wiper switch WASH1 or 2
Below 1.0
STP1 ↔ GND1, 2
G O ↔ W B
Stop light switch OFF
Below 1.0
STP1 ↔ GND1, 2
(B7–18 ↔ B5–9, B8–2)
G–O ↔ W–B
Stop light switch ON
10 – 14
PKB ↔ GND1, 2
R B ↔ W B
Ignition switch ON, PKB switch OFF
10 – 14
PKB ↔ GND1, 2
(B7–19 ↔ B5–9, B8–2)
R–B ↔ W–B
Ignition switch ON, PKB switch ON
Below 1.0
HF
*1
↔ GND1, 2
R ↔ W B
Headlight dimmer switch LOW or HI
10 – 14
HF ↔ GND1, 2
(B7–20 ↔ B5–9, B8–2)
R ↔ W–B
Headlight dimmer switch FLASH
Below 1.0
RWC1 ↔ GND1, 2
R ↔ W B
Ignition switch ON, rear wiper switch except INT
10 – 14
RWC1 ↔ GND1, 2
(B7–21 ↔ B5–9, B8–2)
R ↔ W–B
Ignition switch ON, rear wiper switch INT
Below 1.0
A ↔ GND1, 2
P ↔ W B
Light control switch except AUTO
10 – 14
A ↔ GND1, 2
(B6–4 ↔ B5–9, B8–2)
P ↔ W–B
Light control switch except AUTO
Below 1.0
HU
*1
↔ GND1, 2
R W ↔ W B
Headlight dimmer switch LOW
10 – 14
HU ↔ GND1, 2
(B6–5 ↔ B5–9, B8–2)
R–W ↔ W–B
Headlight dimmer switch HI or FLASH
Below 1.0
FFOG ↔ GND1, 2
G Y ↔ W B
Headlight dimmer switch LOW, fog light switch OFF
10 – 14
FFOG ↔ GND1, 2
(B6–7 ↔ B5–9, B8–2)
G–Y ↔ W–B
Headlight dimmer switch LOW, fog light switch ON
Below 1.0
RFGO ↔ GND1, 2
G W ↔ W B
Rear fog light OFF
10 – 14
RFGO ↔ GND1, 2
(B6–11 ↔ B5–9, B8–2)
G–W ↔ W–B
Rear fog light ON
Below 1.0
RDR+ ↔ GND1, 2
L B ↔ W B
Back door lock motor is activated to lock
Below 1.0
RDR+ ↔ GND1, 2
(B5–1 ↔ B5–9, B8–2)
L–B ↔ W–B
Back door lock motor is not operated
10 – 14
BECU ↔ GND1, 2
(B5–2 ↔ B5–9, B8–2)
G–B
*1
↔ W–B
W–L
*2
Constant
10 – 14
RWLM ↔ GND1, 2
L ↔ W B
Rear wiper switch OFF
Below 1.0
RWLM ↔ GND1, 2
(B5–3 ↔ B5–9, B8–2)
L ↔ W–B
Rear wiper switch ON, ignition switch ON
10 – 14
RWIG ↔ GND1, 2
L W ↔ W B
Ignition switch OFF
Below 1.0
RWIG ↔ GND1, 2
(B5–4 ↔ B5–9, B8–2)
L–W ↔ W–B
Ignition switch ON
10 – 14
RDR– ↔ GND1, 2
L R ↔ W B
Back door lock motor is activated to unlock
Below 1.0
RDR ↔ GND1, 2
(B5–6 ↔ B5–9, B8–2)
L–R ↔ W–B
Back door lock motor is not operated
10 – 14
RWSW ↔ GND1, 2
L O ↔ W B
Rear wiper operated
10 – 14
RWSW ↔ GND1, 2
(B5–7 ↔ B5–9, B8–2)
L–O ↔ W–B
Rear wiper STOP
Below 1.0
WIG ↔ GND1, 2
L Y ↔ W B
Ignition switch OFF
Below 1.0
WIG ↔ GND1, 2
(B5–8 ↔ B5–9, B8–2)
L–Y ↔ W–B
Ignition switch ON
10 – 14
GND1 ↔ Body ground
(B5–9 ↔ Body ground)
W–B
Constant
Below 1.0
DIM
*1
↔ GND1, 2
G
W B
Headlight dimmer switch LOW
10 – 14
DIM ↔ GND1, 2
(B5–10 ↔ B5–9, B8–2)
G ↔ W–B
Headlight dimmer switch HI or FLASH
Below 1.0
HRLY ↔ GND1, 2
R
W B
Light control switch OFF or TAIL
10 – 14
HRLY ↔ GND1, 2
(B5–12 ↔ B5–9, B8–2)
R ↔ W–B
Light control switch HEAD
Below 1.0
DRL
*1
↔ GND1, 2
G Y
W B
Engine running and PKB switch OFF
Below 1.0
DRL ↔ GND1, 2
(B5–14 ↔ B5–9, B8–2)
G–Y ↔ W–B
Engine running and PKB switch ON or light control switch HEAD
10 – 14
HEAD ↔ GND1, 2
R L
W B
Light control switch OFF or TAIL
10 – 14
HEAD ↔ GND1, 2
(B5–15 ↔ B5–9, B8–2)
R–L ↔ W–B
Light control switch HEAD
Below 1.0
TAIL ↔ GND1, 2
G R
W B
Light control switch OFF
10 – 14
TAIL ↔ GND1, 2
(B5–16 ↔ B5–9, B8–2)
G–R ↔ W–B
Light control switch TAIL or HEAD
Below 1.0