Lexus RX300 (MCU15). Manual — part 323
I02680
Malfunction Code (Example Code 12, 99)
0.5 Sec. 0.5 Sec.
1.5 Sec. 2.5 Sec.
One Cycle
4.5 Sec.
DI–524
–
DIAGNOSTICS
ENGINE IMMOBILISER SYSTEM
LEXUS RX300 (RM785E)
(4)
When DTC ”99” is output, there is a trouble of
immobiliser. Start troubleshooting referring to
PROBLEM SYMPTOM TABLE.
(5)
After completing the check, disconnect terminals 13
(TC) and 4 (CG) and turn off the display.
HINT:
In the event of 2 or more malfunction codes, indication will begin
from the smaller numbered code and continue in order to the
larger.
(c)
Clear the DTC.
The following actions will erase the DTCs and freeze
frame data.
(1)
Operating the hand–held tester to erase the codes.
(2)
Disconnecting the battery terminals or EFI fuse.
DI1AM–20
–
DIAGNOSTICS
ENGINE IMMOBILISER SYSTEM
DI–525
LEXUS RX300 (RM785E)
DIAGNOSTIC TROUBLE CODE CHART
DTC No.
(See page)
Detection Item
Trouble Area
B2795
(DI–529)
Unmatched key code
S Key
S Unregistered key inserted before
B2796
(DI–530)
No communication in immobiliser system
S Key
S Transponder key coil
S Amplifier
S Wirehaness
S Engine & ECT ECU
B2797
(DI–533)
Communication malfunction No.1
S Communication contests
S Unregistered key inserted before
B2798
(DI–535)
Communication malfunction No.2
S Key
S Transponeder key coil
S Amplifier
S Wirehaness
S Engine & ECT ECU
HINT:
To reduce the unnecessary exchange of engine & ECT ECU, check that a trouble occurs with the original
engine & ECT ECU at the time of exchanging engine & ECT ECU and the trouble will disappear with a new
engine & ECT ECU.
DI1AN–07
I07371
Transponder Key Amplifier
Transponder Key Coil
Engine & ECT ECU
DI–526
–
DIAGNOSTICS
ENGINE IMMOBILISER SYSTEM
LEXUS RX300 (RM785E)
PARTS LOCATION
DI84X–01
D01054
E6
E7
E9
E10
E8
–
DIAGNOSTICS
ENGINE IMMOBILISER SYSTEM
DI–527
LEXUS RX300 (RM785E)
TERMINALS OF ECU
Symbols (Terminals No.)
Wiring Color
Condition
STD Voltage (V)
TXCT – E1
(E10–18 ↔ E7–17)
GR ↔ BR
Ignition Switch ON
10 – 14
RXCK – E1
(E10–19 ↔ E7–17)
P ↔ BR
Ignition Switch ON
10 – 14
KSW – E1
(E10–23 ↔ E7–17)
L ↔ BR
Ignition Switch ON
10 – 14
CODE – E1
(E10–28 ↔ E7–17)
V ↔ BR
Ignition Switch ON
10 – 14
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