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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: RM000000Y7W01OX
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function): DESCRIPTION (2008 LX570)

DTC

B2276

ACCR Signal Circuit Malfunction

DESCRIPTION

This DTC is stored when a malfunction is detected in the ACCR signal output by the main body ECU.

DTC Code

Detection Condition

Trouble Area

B2276

The ACCR output circuit inside the main body ECU or other related circuit is malfunctioning.
  • Main body ECU
  • ECM
  • Harness or connector

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.

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) Check whether DTC B2276 is output 50 seconds or more after the engine switch is turned on (IG).

Result

Result

Proceed to

DTC B2276 output

A

No DTC output

B
A

2.

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - ECM)


(a) Disconnect the E2 main body ECU connector.

(b) Disconnect the A38 ECM connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

E2-3 (ACCR) - A38-41 (ACCR)

Always

Below 1 Ω

E2-3 (ACCR) or A38-41 (ACCR) - Body ground

Always

10 kΩ or higher
OK

3.

INSPECT MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)


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

Standard Voltage:

Tester Connection

Condition

Specified Condition

E2-3 (ACCR) - Body ground

Engine switch pressed and engine cranking

11 to 14 V
OK