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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: RM0000027YQ00FX
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function): DESCRIPTION (2008 LX570)

DTC

B2272

Ignition 1 Monitor Malfunction

DESCRIPTION

This DTC is stored when a malfunction occurs in the IG1D output circuit, which is between the IG1 No. 3 relay actuation circuit inside the main body ECU and the IG1 No. 3 relay.

DTC Code

Detection Condition

Trouble Area

B2272

The IG1 No. 3 relay actuation circuit inside the main body ECU or other related circuit is malfunctioning.
  • Main body ECU
  • Harness or connector

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.

READ VALUE USING TECHSTREAM (IG1 RELAY MONITOR (OUTSIDE))

(a) Use the Data List to check if the IG1 No. 3 relay is functioning properly.

Main Body

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

IG1 Relay Monitor(Outside)

IG1 No. 3 relay outer 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 B2272 is output.

Result

Result

Proceed to

No DTC output

A

DTC B2272 output

B
A

3.

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY AND BODY GROUND)


(a) Disconnect the E1, 2A and 2D main body ECU connectors.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

2A-1 - Body ground

Always

11 to 14 V

Standard Resistance:

Tester Connection

Condition

Specified Condition

E1-3 (IG1D) - 2D-43

Always

Below 1 Ω

2D-62 (GND2) - Body ground

Always

Below 1 Ω

E1-3 (IG1D) or 2D-43 - Body ground

Always

10 kΩ or higher
OK