Power Source Mode Does Not Change To ON (IG)

2GR-FE STARTING: SMART ACCESS SYSTEM WITH PUSH-BUTTON START: Power Source Mode does not Change to ON (IG)
- Power Source Mode does not Change to ON (IG)

DESCRIPTION

When the engine switch is pushed with the electrical key in the cabin, the main body ECU receives signals to switch the power source mode.

HINT
To allow use of Techstream to inspect the push-button start function when the engine switch is off, repeat opening and closing any of the doors. Opening and closing a door establishes communication between Techstream and the main body ECU. (Opening and closing a door can also be simulated by operating a door courtesy light switch.)

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (AM2)

(a) Remove the AM2 fuse from the engine room J/B.

(b) Measure the resistance of the fuse.

Standard resistance:

Below 1 Ohms

NG -- REPLACE FUSE
OK -- Continue to next step.

2. CHECK CONNECTORS

(a) Check that the connectors are securely connected and the terminals are not deformed or loose.

OK:

The connectors are securely connected and the terminals are not deformed or loose.

NG -- REPAIR OR REPLACE CONNECTORS
OK -- Continue to next step.

3. CHECK WIRE HARNESS (MAIN BODY ECU - BATTERY)

(a) Disconnect the E60 and E61 ECU connectors.

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

Standard voltage:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. CHECK WIRE HARNESS (MAIN BODY ECU - BODY GROUND)

(a) Disconnect the DF ECU connector.

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

Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

5. INSPECT RELAY (IG2 RELAY)

(a) Remove the IG2 relay from the engine room R/B No. 2.

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

Standard resistance:

NG -- REPLACE RELAY
OK -- Continue to next step.

6. CHECK WIRE HARNESS (ENGINE ROOM R/B - MAIN BODY ECU AND BODY GROUND)

(a) Remove the IG2 relay from the engine room R/B.

(b) Disconnect the E60 ECU connector.

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

Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

7. INSPECT RELAY (IG1 RELAY)

(a) Remove the IG1 relay from the instrument panel J/B.

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

Standard resistance:

NG -- REPLACE RELAY
OK -- Continue to next step.

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

(a) Disconnect the Dl J/B connector.

(b) Disconnect the E61 ECU connector.

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

Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

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

(a) Disconnect the DF and DA J/B connectors.

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

Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

10. INSPECT INSTRUMENT PANEL J/B

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

Standard resistance:

OK -- REPLACE MAIN BODY ECU

NG -- REPLACE INSTRUMENT PANEL J/B