DTC B2281: "P" Signal Malfunction: Procedure

1. Check for CAN communication system DTCs. Refer to HOW TO PROCEED WITH TROUBLESHOOTING .

   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 → See step   5 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG) and turn the Techstream main switch on.
3. 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 → See step   6 

OK: Go to next step 

1. Disconnect the E50 and E81 ECU connectors.
   Fig 1: Identifying E50 And E81 ECU Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. 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: Go to next step 

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 → See step   7 

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