Toyota 4Runner manuals

Toyota 4Runner: Runnable Signal Malfunction (B2286,P0335)

DESCRIPTION

The power management control ECU and ECM are connected by a cable and the CAN communication lines. These DTCs are stored when the crankshaft position sensor signal information from the cable and the crankshaft position sensor signal information from the CAN communication line are inconsistent.

HINT:

When the power management control ECU is replaced with a new one and the cable is connected to the negative (-) battery terminal, the power source mode is reset to on (IG). When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

DTC Code

DTC Detection Condition

Trouble Area

B2286

P0335

The crankshaft position sensor signal information from the cable and the crankshaft position sensor signal information from the CAN communication line are inconsistent.

  • AM2 fuse
  • Engine control system
  • Power management control ECU
  • Harness or connector

WIRING DIAGRAM


CAUTION / NOTICE / HINT

NOTICE:

  • When using the Techstream with the engine switch off to troubleshoot: Connect the Techstream to the vehicle and turn a courtesy light switch on and off at 1.5 second intervals until communication between the Techstream and vehicle begins.
  • Before performing the inspection, check that there are no problems related to the CAN communication system and LIN communication system.
  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU)



NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

2.

CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)



NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

3.

CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - ECM)

(a) Disconnect the F81 power management control ECU connector.

(b) Disconnect the B37 ECM connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F81-4 (NE) - B37-29 (NEO)

Always

Below 1 Ω

F81-4 (NE) - Body ground

Always

10 kΩ or higher


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

4.

READ VALUE USING TECHSTREAM (ENGINE CONDITION)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Power Source Control / Data List.

(e) According to the display on the Techstream, read the Data List.

Power Source Control

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Engine Condition

Engine condition / Stop or Run

Stop: Engine stopped

Run: Engine running

-

OK:

ON (engine stopped) or OFF (engine running) appears on the screen according to the engine condition.


OK

GO TO SFI SYSTEM (HOW TO PROCEED WITH TROUBLE SHOOTING)


NG

5.

CHECK POWER MANAGEMENT CONTROL ECU

(a) Reconnect the power management control ECU connectors.

Text in Illustration

*a

Component with harness connected

(Power Management Control ECU)

-

-

(b) Using an oscilloscope, check the engine speed input signal waveform at the terminal of the power management control ECU.

Standard Frequency:

Tester Connection

Condition

Specified Condition

F81-4 (NE) - Body ground

Engine stopped

No pulse generated

Engine running

Pulse generated

(1000 rpm: 200 Hz)


OK

REPLACE POWER MANAGEMENT CONTROL ECU


NG

GO TO SFI SYSTEM (HOW TO PROCEED WITH TROUBLE SHOOTING)

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