Inspection Procedure

READ VALUE OF INTELLIGENT TESTER

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

Select the item below in the Data List, and read the display on the tester.

HINT:

When using the intelligent tester with the engine switch off, turn on and off any of the door courtesy light switches repeatedly at 1.5 second intervals or less until communication between the tester and vehicle starts.

MAIN BODY:

DATA LIST (MAIN BODY)

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 (IG) (IG1 relay is ON) OFF: Engine switch off (IG1 relay is OFF)	-

ON: "ON" (engine switch on (IG)) appears on the screen.

NG: Go to step 3

OK: Go to Next Step

CHECK ENGINE SWITCH CONDITION
1. Check the power source mode change.
  1. When the key is inside the vehicle and the shift lever is in the P position, check that pressing the engine switch causes the power source mode to change as follows:
    OK: off → on (ACC) → on (IG) → off
    
    HINT:
    - If power mode does not change to ON (IG and ACC), (See POWER SOURCE MODE DOES NOT CHANGE TO ON (IG AND ACC) ).
    - If power mode does not change to ON (IG), (See POWER SOURCE MODE DOES NOT CHANGE TO ON (IG) ).
NG: GO TO OTHER PROBLEM

OK: Go to Next Step

INSPECT RELAY (IG1 RELAY)

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

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

Standard resistance

RESISTANCE SPECIFICATION

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 IG1 Relay Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE RELAY

OK: Go to Next Step

CHECK WIRE HARNESS (INSTRUMENT PANEL J/B - MAIN BODY ECU)

Disconnect the DI J/B connector.

Fig 2: Identifying Instrument Panel J/B And Main Body ECU Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the E61 ECU connector.

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

Standard resistance

RESISTANCE SPECIFICATION

Terminal No. (Symbol)	Condition	Specified Condition
DI-9 - E61-3 (IG1D)	Always	Below 1 Ω
E61-3 (IG1D) - Body ground	Always	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 DF and DA J/B connectors.

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

Standard resistance

RESISTANCE SPECIFICATION

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

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

Standard voltage

VOLTAGE SPECIFICATION

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

Fig 3: Identifying Instrument Panel J/B Connector Terminals

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 4: Identifying Instrument Panel J/B And IG1 Relay Connector Terminals

Standard resistance

RESISTANCE SPECIFICATION

Terminal No.	Condition	Specified value
DF-10 - IG1 relay terminal-1	Always	Below 1 Ω
DI-9 - IG1 relay terminal-2	Always	Below 1 Ω
DF-10 - Body ground	Always	10 kΩ or higher
DI-9 - Body ground	Always	10 kΩ or higher

NG: REPLACE INSTRUMENT PANEL J/B

OK: REPLACE MAIN BODY ECU