Identifying condition LEXUS LS430 2003 Factory Repair Manual

Fig. 10: Identifying Terminals Of DLC3
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SPECIFIED CONDITION
3.INSPECT BATTERY VOLTAGE Standard: 11 to 14 V
If voltage is below 11 V, recharge the battery before proceeding.
1.DATA LIST
HINT:
Symbols (Terminals No.)Terminal DescriptionConditionSpecified condition
SIL (7) - SG (5)Bus "+" lineDuring transmissionPulse generation
CG (4) - Body groundChassis groundAlwaysBelow 1 ohms
SG (5) - Body groundSignal groundAlwaysBelow 1 ohms
BAT (16) - Body groundBattery positiveAlways11 to 14V

Standard: Below 1 ohms
NG: REPLACE FUSE
OK: GO TO NEXT STEP
2.INSPECT RELAY (Marking: D-IG1)
a. Remove the D-IG1 relay from the driver side J/B.
b. Measure the resistance.
Standard:
Fig. 15: Identifying terminals Of D
-IG1 Relay
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SPECIFIED CONDITION
NG: REPLACE RELAY
OK: GO TO NEXT STEP
Tester connectionSpecified condition
3 - 510 kohms or higher
3 - 5Below 1 ohms (when battery voltage is applied to terminals 1 and 2)

3.CHECK WIRE HARNESS (DRIVER DOOR ECU - BATTERY AND BODY GROUND)
a. Disconnect the D25 ECU connector.
b. Measure the voltage and resistance of the wire harness side connector.
Standard:
Fig. 16: Identifying Terminals Of Driver Door ECU

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SPECIFIED CONDITION
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS
TABLE
Tester connectionConditionSpecified condition
D25-1 (GND) - Body groundAlwaysBelow 1 ohms
D25-4 (CPUB) - Body groundAlways10 to 14V
D25-6 (BDR)- Body groundAlways10 to 14V
D25-5 (SIG) Body groundIgnition switch ON10 to 14V

Fig. 19: Identifying Terminals Of Front Door Courtesy Lamp Switch Assy
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NG: REPLACE FRONT DOOR COURTESY LAMP SWITCH ASSY
OK: GO TO NEXT STEP
3.CHECK WIRE HARNESS (FRONT DOOR COURTESY LAMP SWITCH ASSY LH -
MULTIPLEX NETWORK BODY ECU (DRIVER DOOR ECU))
a. Disconnect the D13 switch and D25 ECU connectors.
b. Measure the resistance of the wire harness side connectors.
Standard:
SPECIFIED CONDITION
Tester connectionSpecified condition
D13-1 - D25-23 (CTY)Below 1 ohms

Fig. 22: Identifying Terminals Of Front Door Courtesy Lamp Switch (Driver Side)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
SPECIFIED CONDITION
If the result is not as specified, replace the switch ass
y.
Tester ConnectionSwitch ConditionSpecified Condition
1 - Body groundNot pushed (ON)Below 1 ohms
1 - Body groundPushed (OFF)10 kohms or higher

Fig. 10: Identifying Bluetooth Capable Cellular
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1.Vehicle brought into a workshop
2.Diagnostic questioning and symptom confirmation (see CUSTOMER PROBLEM ANALYSIS
CHECK )
Ask the customer about symptoms and confirm malfunctions. Fill out the Customer Problem Analysis
check sheet.
The screen displays nothing (go to step 6, proceed to "BLACK SCREEN (NO IMAGE APPEARS
ON NAVIGATION/AUDIO SCREEN)")
Other symptoms (go to step 3)
3.Confirm the system normal condition (see SYSTEM NORMAL CONDITION CHECK
)
Applicable (This is not a malfunction.)
Not applicable (go to step 4)
4.Check the diagnostic trouble codes (see DIAGNOSTIC TROUBLE CODE CHART
)
HINT:
If the system cannot enter the diagnosis mode, inspect each AVC-LAN communication signal and

Fig. 20: Displaying Panel Switch
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4.Operate each switch and check that the switch name and condition is correctly displayed.
Fig. 21: Identifying Panel Switch Check Mode

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HINT:
This mode checks the vehicle signal status input to the multi-display.
Illustrations may differ from the actual vehicle depending on the device settings and options. Therefore,
some detailed areas ma
y not be shown exactly the same as on the actual vehicle.

Fig. 24: Identifying Vehicle Signal Chart
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4.When the "Vehicle Signal Check Mode" screen is displayed, check all the vehicle signal conditions.
HINT:
Only conditions having inputs are displayed.
This screen is updated once per second when input signals to the vehicle are changed.
HINT:
This mode displays GPS satellite information.
Illustrations may differ from the actual vehicle depending on the device settings and options. Therefore,
some detailed areas may not be shown exactly the same as on the actual vehicle.
1.Enter diagnostic mode (see DIAGNOSTIC START
-UP/FINISH ).

Fig. 27: Identifying GPS Information Chart
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4.When GPS information is displayed, check the GPS conditions.
HINT:
This screen is updated once per second when input signals to the vehicle are changed.
HINT:
This mode checks the vehicle signal status to the navigation ECU.
Illustrations may differ from the actual vehicle depending on the device settings and options. Therefore,
some detailed areas may not be shown exactly the same as on the actual vehicle.
1.Enter diagnostic mode (see DIAGNOSTIC START
-UP/FINISH ).

Fig. 53: Identifying System Normal Condition
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(g) The following symptoms are not a malfunction, but are caused by errors inherent in the GPS, gyro
sensor, speed sensor, and navigation ECU.
1. The current position mark may be displayed on a nearby parallel road the vehicle actually runs on.