DTC B2281 "P" Signal Malfunction

DESCRIPTION

This DTC is stored when there is an abnormal circuit between the main body ECU and the shift lock control ECU.

DTC Code	Detection Condition	Trouble Area
B2281	Communication or the communication line is abnormal between the main body ECU and shift lock control ECU.	Main body ECU Shift lock control ECU Harness or connector

Dtc B2281 P Signal Malfunction. THEFT DETERRENT / KEYLESS ENTRY. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

1.READ VALUE USING INTELLIGENT TESTER (SHIFT P SIGNAL)

Use the Data List to check if the shift position signal is functioning properly.

Main Body
Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Shift P Signal	Shift P position signal/ON or OFF	ON: Shift lever in P OFF: Shift lever not in P	-

Result
Result	Proceed to
Display on the intelligent tester does not change according to shift lever operation	A
Display on the intelligent tester changes according to shift lever operation	B

REPLACE MAIN BODY ECU

A

2.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - SHIFT LOCK CONTROL ECU AND BODY GROUND)

Dtc B2281 P Signal Malfunction. THEFT DETERRENT / KEYLESS ENTRY. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Disconnect the E4 main body ECU connector.

Disconnect the E51 shift lock control ECU connector.

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

Standard Resistance:
Tester Connection Condition Specified Condition
E4-2 (P) - E51-11 (P2) Always Below 1 Ω
E51-3 (E) - Body ground Always Below 1 Ω
E4-2 (P) or E51-11 (P2) - Body ground Always 10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.INSPECT SHIFT LOCK CONTROL ECU

Check the signal waveform according to the condition(s) in the table below.

Reference
Terminal No. (Symbol)	Tool Setting	Condition
E51-11 (P2) - E51-3 (E)	2 V/DIV., 20 msec./DIV.	Shift lever in P

REPLACE SHIFT LOCK CONTROL ECU ()

REPLACE MAIN BODY ECU