DTC B2281: "P" Signal Malfunction: Procedure

1. Clear the DTC. Refer to DTC CHECK / CLEAR .
2. Check for multiplex network communication system DTCs B1210, B1214 and B1215.

   HINT: 

   If the DTCs for the multiplex network communication system malfunction are output, inspect those DTCs first.

   RESULT
   
   

   Result	Proceed to
   DTCs B1210, B1214 and B1215 are not output.	A
   DTCs B1210, B1214 and B1215 are 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).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Power Source Control / Data List.
5. Read the Data List according to the display on the Techstream.
   POWER SOURCE CONTROL
   
   

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

   RESULT
   
   

   Result	Proceed to
   ON (shift position is P) and OFF (shift position is not P) appear on the screen according to vehicle operating conditions.	A
   ON (shift position is P) and OFF (shift position is not P) do not appear on the screen according to vehicle operating conditions (for A760E).	B
   ON (shift position is P) and OFF (shift position is not P) do not appear on the screen according to vehicle operating conditions (for A960E).	C

B → See step   6 

C → See step   9 

A: Go to next step 

1. Disconnect the J55 connector from the power source control ECU.
   Fig 1: J55 And J48 Connector Terminal Identification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the J48 connector from the shift lock control ECU.
3. Measure the resistance according to the value(s) in the table below.
   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   J55-5 (P) - J48-11 (P2)	Always	Below 1 Ω
   J55-5 (P) or J48-11 (P2) - Body ground	Always	10 kΩ or higher
   J48-8 (E) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Power Source Control ECU)
   *2	Front view of wire harness connector (to Shift Lock Control ECU)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CONTROL ECU - SHIFT LOCK CONTROL ECU) 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 2: Shift Lock Control ECU Connector Terminal Identification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   J48-11 (P2) - J48-8 (E)	Shift lever is in P	Below 1 Ω
   J48-11 (P2) - J48-8 (E)	Shift lever is not in P	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Shift Lock Control ECU)

   RESULT
   
   

   Result	Proceed to
   OK	A
   NG (for A960E)	B
   NG (for A760E)	C

B → See step   10 

C → See step   7 

A → See step   8