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

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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: RM000000XEK01UX
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function): DESCRIPTION (2008 LX570)

DTC

B2271

Ignition Hold Monitor Malfunction

DESCRIPTION

This DTC is stored when the IG output circuits inside the main body ECU are open or shorted.

DTC Code	Detection Condition	Trouble Area
B2271	The IG1 No. 3 relay actuation circuit or integration relay (IG2 relay) actuation circuit inside the main body ECU is abnormal.	Main body ECU AM2 fuse Harness or connector

1.	CHECK WHETHER DTC OUTPUT RECURS

(b) Check whether DTC B2271 is output.

Result	Proceed to
DTC B2271 output	A
No DTC output	B

2.	INSPECT FUSE (AM2)

(a) Remove the AM2 fuse from the engine room relay block.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
AM2 fuse	Always	Below 1 Ω

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

(a) Disconnect the E1, E2 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
E1-6 (AM1) - Body ground	Always	11 to 14 V
E2-1 (AM2) - Body ground	Always	11 to 14 V

Standard Resistance:

Tester Connection	Condition	Specified Condition
2D-62 (GND2) - Body ground	Always	Below 1 Ω