ELECTRIC POWER CONTROL SYSTEM, Diagnostic DTC:B22AB

DTC Code DTC Name
B22AB Open in Starter Switch Terminal

DESCRIPTION

The electric power control ECU inputs the STSW signal, and detects when the engine is started.

DTC Code DTC Detection Condition Trouble Area
B22AB Engine is started but there is no STSW signal input history

  • Passenger side junction block (Electric power control ECU)

  • Wire harness

WIRING DIAGRAM

A001EMKE01
*a Electric Power Control ECU
*b Passenger Side Junction Block
*c Main Body ECU
*d Driver Side Junction Block

PROCEDURE


  1. CHECK ELECTRIC POWER CONTROL ECU (STSW SIGNAL)

    A001FBGE01
    *1 Front view of wire harness connector: (to Electric Power Control ECU)

    1. Disconnect the A69 ECU connector.

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      A69-12 (STSW) - Body ground Engine switch on (IG) → cranking Below 1 V → 8 to 14 V

    OK

    REPLACE PASSENGER SIDE JUNCTION BLOCK (ELECTRIC POWER CONTROL ECU)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (PASSENGER SIDE JUNCTION BLOCK - MAIN BODY ECU)