Dtc B2281 P Signal Malfunction

Vehicle Interior. Corolla. Zre142 Aze141
Theft Deterrent Keyless Entry. Corolla. Zre142 Aze141

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN COMMUNICATION SYSTEM

READ VALUE USING TECHSTREAM

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

CHECK MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) OPERATION

DTC B2281 "P" Signal Malfunction


DESCRIPTION

The ECM and the shift lock control ECU are connected by a cable and the CAN. If the cable information and CAN information are inconsistent, this DTC will be output.
HINT:
If the main body ECU (instrument panel junction block) is replaced with a new one while the cable from the negative (-) battery terminal is connected, the power source mode will be in IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored. After the main body ECU (instrument panel junction block) is replaced, perform the registration procedure for the engine immobiliser system (COROLLA_ZRE142 RM000000QYF05AX.html).

DTC No.
DTC Detection Condition
Trouble Area
B2281
Cable information and CAN information between main body ECU (instrument panel junction block) and shift lock control ECU are inconsistent
  1. Main body ECU (instrument panel junction block)
  2. Shift lock control ECU
  3. Wire harness or connector

WIRING DIAGRAM


Corolla. Zre142 Aze141.Theft Deterrent Keyless Entry.Smart Key System (For Entry Function). Dtc B2281 P Signal Malfunction


INSPECTION PROCEDURE

1.CHECK CAN COMMUNICATION SYSTEM

  1. Check for CAN communication system DTCs (COROLLA_ZRE142 RM000000WI60ACX.html).

    HINT:
    If the DTCs for the CAN communication system malfunction are output, inspect those DTCs first.
    Result:
    Result
    		Proceed to
    CAN communication DTC is not output
    		A
    CAN communication DTC is output
    		B


B
GO TO CAN COMMUNICATION SYSTEM (COROLLA_ZRE142 RM000002B6V03LX.html)
A


2.READ VALUE USING TECHSTREAM

  1. Connect the Techstream to the DLC3.

  1. Turn the engine switch on (IG) and turn the Techstream main switch on.

  1. Read the Data List according to the displays on the Techstream.

    Main Body
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Shift P Signal
    		Shift P Signal / ON or OFF
    		ON: Shift P signal ON (Shift position is P)
    OFF: Shift P signal OFF (Shift position is not P)
    		-
    OK:
    "ON" (P signal is ON) and "OFF" (P signal is OFF) appear on the screen.


NG
GO TO SHIFT CONTROL SYSTEM (COROLLA_ZRE142 RM0000023CE056X.html)
OK


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


    Corolla. Zre142 Aze141.Theft Deterrent Keyless Entry.Smart Key System (For Entry Function). Dtc B2281 P Signal Malfunction

  1. Disconnect the E50 and E81 ECU connectors.

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

    Standard Resistance:
    Terminal No. (Symbol)
    		Condition
    		Specified Condition
    E50-15 (P) - E81-7 (P2)
    		Always
    		Below 1 Ω
    E50-15 (P) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU - SHIFT LOCK CONTROL ECU)
OK


4.CHECK MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) OPERATION

  1. After replacing the main body ECU (instrument panel junction block) with a normally functioning ECU, check that the engine can start normally.

    OK:
    Engine can start normally.


NG
REPLACE SHIFT LOCK CONTROL ECU (COROLLA_ZRE142 RM0000020U704NX.html)
OK

END (MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) DEFECTIVE)