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DIAGNOSTICS
MULTI -- MODE MANUAL TRANSMISSION SYSTEM
05 -- 335
COROLLA Supplement (RM1129E)
DTC P1875/22 BUZZER MALFUNCTION
CIRCUIT DESCRIPTION
The buzzer inside the transmission control ECU sounds an alarm when the s hift lever is moved into reverse
or upon mis -- operation.
This DTC is detected and output when power is not supplied to the buzzer built into the transmission control
ECU.
HINT:
There are 2 buzzers in the multi -- mode manual transmission control system, which are built into the c ombina-
tion meter and the transmission control ECU. The buzzer built into the c ombination meter sounds when any
door is opened with the transmission set in any gear while the system is operating. The buzzer built into the
ECU s ounds when the s hift lever is moved to the R position.
DTC No.
DTC Detecting Condition
Trouble A rea
P1875/22
The transmission control E CU det ects the following conditions
simultaneously:
(a) The buzzer does not sound.
(b) Buzzer operation v oltage is 3 V or less for 5.0 seconds.
S
Transmission control ECU
INSPECTION PROCEDURE
1 CHECK BUZZER
(a) Turn the ignition switch on.
(b) Shift the lever into reverse.
OK: The buzzer sounds.
NG REPLACE TRANSMISSION CONTROL ECU
OK
2 CHECK OTHER DTCs O UTPUT ( IN ADDITION TO DTC P1875/22)
(a) Connect the the intelligent tester II to the DLC3.
(b) Turn the ignition switch on and turn the intelligent tester II main switch on.
(c) Read the DTCs using the intelligent tester II.
Result:
Display (DTC output)
Proceed to
”P1875/22” only
A
”P1875/22” and other DTCs
B
HINT:
If any other codes besides ”P1875/22” are output, perform troubleshooting for those DTCs first.
B
GO TO DTC CHART
A
REPLACE TRANSMISSION CONTROL ECU ASSY
05L4R--02
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TOYOTA COROLLA REPAIR MANUAL SUPP 1129E