Toyota 4Runner: Open or Short in Master Cylinder Pressure Sensor (C1421,C1281,C1423,C1424)
DESCRIPTION
DTC Code
|
DTC Detection Condition
|
Trouble Area
|
C1421
|
Either condition is met:
Both of the following conditions continue for at least 1.2 seconds.
- The IG1 terminal voltage is between 9.5 V and 17.0 V.
- The VM/C1 terminal voltage is not within 4.4 V and 5.6 V.
Both of the following conditions continue for at least 1.2 seconds.
- The VM/C1 terminal voltage is between 4.4 V and 5.6 V.
- The PM/C1 terminal voltage is not within 0.19 V and 4.57 V.
|
- Master cylinder pressure sensor circuit
- Master cylinder solenoid (Master cylinder pressure sensor, skid
control ECU)
|
C1423
|
Both of the following conditions continue for at least 5 seconds
- The stop light switch is off.
- The PM/C1 terminal voltage is below 0.3 V.
|
C1424
|
One of the following condition is met:
- Noise occurs in the signal from the PM/C1 terminal 7 times or
more within 5 seconds
- When the vehicle speed drops from 40 km/h (25 mph) to 10 km/h
(6 mph), the master cylinder pressure does not change by at least
0.048 MPa.
- At a vehicle speed of 7 km/h (4 mph) or more, the PM/C1 terminal
voltage is between 0.86 and 1.0 V and master cylinder pressure does
not change by at least 0.048 MPa for 60 seconds or more.
- At a vehicle speed of 7 km/h (4 mph) or more, the PM/C1 terminal
voltage is 1.0 V or higher and master cylinder pressure does not
change by at least 0.048 MPa for 30 seconds or more.
- At a vehicle speed of 7 km/h (4 mph) or more with the stop light
switch ON, a state in which the master cylinder pressure sensor
input value is sufficiently greater than the estimated master pressure
continues for 1 second of more and this state occurs 5 or more times
each time the ignition switch is turned to ON, and this occurs 8
or more times consecutively.
|
C1281
|
Stored only during test mode.
|
CAUTION / NOTICE / HINT
NOTICE:
When replacing the master cylinder solenoid, perform calibration (See page
).
PROCEDURE
1.
|
REPLACE MASTER CYLINDER SOLENOID
|
(a) Replace the master cylinder solenoid (See page
).
NEXT |
|
END
|
DESCRIPTION
Refer to DTCs C1419 and C1435 (See page ).
DTC Code
DTC Detection Condition
Trouble Area
C1420
After the difference between ...
DESCRIPTION
Refer to DTCs C1421, C1423 and C1424 (See page
).
DTC Code
DTC Detection Condition
Trouble Area
C1422
When the stop light s ...
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DESCRIPTION
The main body ECU receives headlight dimmer switch information signals, and illuminates
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WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses and bulbs for circuits related to this system before performin ...
System Diagram
SYSTEM DIAGRAM
Communication Table
Sender
Receiver
Signal
Line
Main Body ECU
Certification ECU
Front door courtesy light switch LH signal
Front door courte ...