Toyota Sequoia (2005). Manual — part 533

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DIAGNOSTICS

MULTIPLEX COMMUNICATION SYSTEM

DI–1927

2121

DTC

B1224

Door lock switch circuit on passenger
door

CIRCUIT DESCRIPTION

This DTC is output while the body ECU senses the door lock state through the door unlock detection switch,
which is built into the door lock motor.
If the DTC is output, the following may be malfunctioning:

DTC No.

DTC Detecting Condition

Trouble Area

B1224

Does not operate door key lock and unlock switch

Door lock control switch front RH

(Built in passenger door ECU)

Door unlock detection switch front RH

Wire harness

Body ECU

HINT:
For details of inspection, see page

DI–1818

.

If the problem reoccurs even after replacement, replace the body ECU.

DIDFF–01

DI–1928

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DIAGNOSTICS

MULTIPLEX COMMUNICATION SYSTEM

2122

DTC

B1231

Jam protection limit switch circuit on
driver door

CIRCUIT DESCRIPTION

This DTC is output while the body ECU senses the limit position through the limit switch, which is built into
the power window motor.
If the DTC is not output, the following may be malfunctioning:

DTC No.

DTC Detection Condition

Trouble Area

B1231

No change in limit switch position for more than 2.0 seconds

even if moving the glass down when limit switch is OFF

(window glass is fully closed)

Limit switch (Built in power window motor)

Driver door ECU

Wire harness

Body ECU

HINT:
For details of inspection, see page

DI–1782

.

If the problem reoccurs even after replacement, replace the body ECU.

DI1T1–06

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DIAGNOSTICS

MULTIPLEX COMMUNICATION SYSTEM

DI–1929

2123

DTC

B1232

Jam protection pulse switch circuit on
driver door

CIRCUIT DESCRIPTION

This DTC is output while the body ECU senses switch position information through the pulse switch, which
is built into the power window motor.
If the DTC is not output when the power window operates, the following may be malfunctioning:

DTC No.

DTC Detecting Condition

Trouble Area

B1232

No change in pulse switch position information for more than

2.0 seconds even if moving the glass down when limit switch is

OFF (window glass is fully closed).

Pulse switch (Built in power window motor)

Driver door ECU

Wire harness

Body ECU

HINT:
For details of inspection, see page

DI–1782

.

If the problem reoccurs even after replacement, replace the body ECU.

DI1T2–07

DI–1930

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DIAGNOSTICS

MULTIPLEX COMMUNICATION SYSTEM

2124

DTC

B1233

Jam protection limit switch circuit on
passenger door

CIRCUIT DESCRIPTION

This DTC is output while the body ECU senses the limit position through the limit switch, which is built into
the power window motor.
If the DTC is not output, the following may be malfunctioning:

DTC No.

DTC Detection Condition

Trouble Area

B1233

No change in limit switch position for more than 2.0 seconds

even if moving the glass down when limit switch is OFF

(window glass is fully closed)

Limit switch (Built in power window motor)

Passenger door ECU

Wire harness

Body ECU

HINT:
For details of inspection, see page

DI–1818

.

If the problem reoccurs even after replacement, replace the body ECU.

DIDFG–01