Inspection Procedure

READ VALUE OF INTELLIGENT TESTER

Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG) and press the intelligent tester main switch on.

Select the items below in the Data List, and read the displays on the tester.

PWR SOURCE CTRL (Power source control ECU):

DATA LIST

Item	Measurement Item / Display (Range)	Normal Condition	Diagnostic Note
IG1 RELAY MON1	Status of IG1 relay monitor (outer) / ON or OFF	ON: Engine switch ON (IG1 relay is ON) OFF: Engine switch OFF (IG1 relay is OFF)	-

OK:

"OK" (engine switch on (IG)) appears on the screen.

Result

RESULT

Condition	Proceed to
NG	C
OK (When troubleshooting according to the PROBLEM SYMPTOM TABLE)	B
OK (When troubleshooting according to the DTC chart)	A

B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

C: Go to step 2 below.

A: REPLACE POWER SOURCE CONTROL ECU

INSPECT RELAY (Marking: IG1)

Remove the IG1 relay from the instrument panel J/B.

Measure the resistance according to the value(s) in the table below.

Resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
3 - 5	10 kΩ or higher
3 - 5	Below 1 Ω (when battery voltage is applied to terminals 1 and 2)

Fig 1: Identifying Relay Connector Terminals

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NG: REPLACE RELAY

OK: Go to Next Step

CHECK WIRE HARNESS (INSTRUMENT PANEL J/B - POWER SOURCE CONTROL ECU)

Disconnect the II J/B connector.

Fig 2: Identifying II J/B Connector Terminals
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Disconnect the D44 ECU connector.

Measure the resistance according to the value(s) in the table below.

Fig 3: Identifying D44 ECU Connector Terminal IG1D

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Resistance

TERMINALS REFERENCE

Terminal No. (Symbol)	Specified Condition
II-9 - D44-34 (IG1D)	Below 1 Ω
D44-34 (IG1D) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

CHECK WIRE HARNESS (INSTRUMENT PANEL J/B - BATTERY AND BODY GROUND)

Disconnect the IF and IA J/B connectors.

Measure the resistance according to the value(s) in the table below.

Fig 4: Identifying IF and IA J/B Connectors Terminals

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Resistance

TERMINALS REFERENCE

Terminal No.	Condition	Specified value
IF-10- Body ground	Always	Below 1 Ω

Measure the voltage according to the value(s) in the table below.

Voltage

TERMINALS REFERENCE

Terminal No.	Condition	Specified value
IA-1 - Body ground	Always	10 to 14 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

INSPECT INSTRUMENT PANEL J/B

Measure the resistance according to the value(s) in the table below.

Fig 5: Identifying Instrument Panel J/B Connectors Terminals

Resistance

TERMINALS REFERENCE

Terminal No.	Condition	Specified value
IF-10 - IG1 relay terminal-1	Always	Below 1 Ω
II-9 - IG1 relay terminal-2	Always	Below 1 Ω

NG: REPLACE INSTRUMENT PANEL J/B

OK: REPLACE POWER SOURCE CONTROL ECU