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Last Modified: 11-27-2007 1.6 C
Service Category: Vehicle Interior Section: Theft Deterrent/Keyless Entry
Model Year: 2008 Model: LX570 Doc ID: RM000000XEM01XX
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function): DESCRIPTION (2008 LX570)

DTC

B2273

Ignition 2 Monitor Malfunction

DESCRIPTION

This DTC is stored when a malfunction occurs in the IG2D output circuit, which is between the integration relay (IG2 relay) actuation circuit inside the main body ECU and the integration relay (IG2 relay).

DTC Code

Detection Condition

Trouble Area

B2273

The integration relay (IG2 relay) actuation circuit inside the main body ECU or other related circuit is malfunctioning.
  • Main body ECU
  • IG2 MAIN fuse
  • Integration relay (IG2 relay)
  • Harness or connector

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.

READ VALUE USING TECHSTREAM (IG2 RELAY MONITOR (INSIDE))

(a) Use the Data List to check if the integration relay (IG2 relay) is functioning properly.

Main Body

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

IG2 Relay Monitor(Inside)

Integration relay (IG2 relay) inner relay monitor/ON or OFF

ON: Engine switch on (IG)

OFF: Engine switch off

-

OK:

When the engine switch is turned on (IG), ON is displayed on the Techstream.

OK

2.

CHECK WHETHER DTC OUTPUT RECURS

(a) Clear the DTCs THEFT DETERRENT / KEYLESS ENTRY: SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function): DTC CHECK / CLEAR (2008 LX570) .

(b) Turn the engine switch on (IG), wait at least 10 seconds, and check whether DTC B2273 is output.

Result

Result

Proceed to

No DTC output

A

DTC B2273 output

B
A

3.

INSPECT FUSE (IG2 MAIN)

(a) Remove the IG2 MAIN fuse from the integration relay.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

IG2 MAIN fuse

Always

Below 1 Ω
OK

4.

INSPECT INTEGRATION RELAY (IG2 RELAY)


(a) Install the IG2 MAIN fuse to the integration relay.

(b) Remove the integration relay from the engine room relay block.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1B-8 - 1C-1

Battery voltage applied to terminals 1B-6 and 1B-7

Below 1 Ω

1B-8 - 1C-1

Battery voltage not applied to terminals 1B-6 and 1B-7

10 kΩ or higher
OK

5.

CHECK HARNESS AND CONNECTOR (INTEGRATION RELAY (IG2 RELAY) - MAIN BODY ECU AND BODY GROUND)


(a) Disconnect the E2 main body ECU connector.

(b) Disconnect the 1B integration relay connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

E2-11 (IG2D) - 1B-6

Always

Below 1 Ω

1B-7 - Body ground

Always

Below 1 Ω

E2-11 (IG2D) or 1B-6 - Body ground

Always

10 kΩ or higher
OK