2001 TOYOTA PRIUS brake light
[x] Cancel search: brake lightPage 940 of 1943
F12396
TOYOTA
Hand±held Tester
DLC3
F09750
DLC3Tc
Ts
CG
BR3904
0.13 sec. 0.13 sec.
ON
OFF DI±360
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
2001 PRIUS (RM778U)
(g) In case of using TOYOTA hand±held tester:
Clear the DTC.
(1) Hook up the TOYOTA hand±held tester to the
DLC3.
(2) Turn the ignition switch ON.
(3) Operate the TOYOTA hand±held tester to erase the
codes.
HINT:
Please refer to the TOYOTA hand±held tester operator's manu-
al for further details.
3. SENSOR SIGNAL CHECK (TEST MODE)
HINT:
If the ignition switch is turned from ON to ACC or LOCK during
test mode, DTC will be erased.
(a) In case of not using TOYOTA hand±held tester:
Check the sensor signal.
(1) Turn the ignition switch OFF.
(2) Using SST, connect terminals Ts and CG of DLC3.
SST 09843±18040
(3) Start the engine.
(4) Check that the ABS warning light blinks.
HINT:
If the ABS warning light does not blink, inspect the ABS warning
light circuit and Ts terminal circuit (See page DI±437,
DI±449).
(5) Keep the vehicle in the stationary condition and the
brake pedal in free condition for 1 sec. or more.
(6) Keeping the vehicle in the stationary condition, de-
press the brake pedal with 98 N (10 kgf, 22 lbf) or
more for 1 sec. or more.
(7) Drive vehicle straight forward.
When driving the vehicle at the speed faster than 45
km/h (28 mph) for several seconds, check that the
ABS warning light comes off.
HINT:
There is a case that the sensor check is not completed if the ve-
hicle has its front wheels spun or its steering wheel steered dur-
ing this check.
Page 941 of 1943
BR3893
Malfunction Code (Example Code 72, 76)
72 67
ON
OFF
0.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.1.5 sec.
2.5 sec.4 sec.
Repeat
F12396
TOYOTA
Hand±held Tester
DLC3
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
DI±361
2001 PRIUS (RM778U)
(8) Stop the vehicle.
(9) Using SST, connect terminals Tc and CG of DLC3.
SST 09843±18040
(10) Read the number of blinks of the ABS warning light.
HINT:
See the list of DTC shown on the next page.
If every sensor is normal, a normal code is output (A cycle
of 0.25 sec. ON and 0.25 sec. OFF is repeated).
If 2 or more malfunctions are indicated at the same time,
the lowest numbered code will be displayed 1st.
(11) After doing the check, turn ignition switch OFF, and
disconnect the SST from terminals Ts and CG, Tc
and CG of DLC3.
SST 09843±18040
(b) In case of using TOYOTA hand±held tester:
Check the DTC.
(1) Hook up the TOYOTA hand±held tester to the
DLC3.
(2) Do step (3) to (8) on the previous page and this
page.
(3) Read the DTC by following the prompts on the tes-
ter screen.
HINT:
Please refer to the TOYOTA hand±held tester operator's manu-
al for further details.
Page 944 of 1943
DI±364
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
2001 PRIUS (RM778U)C1219/27
(DI±373)
Malfunction in regenerative solenoid (SS) circuitRegenerative solenoid (SS) circuit
Brake actuator
C1220/46
(DI±392)Malfunction in regulator (REG) pressure sensor
C1221/46
(DI±392)Malfunction in front (FR) pressure sensor
Each pressure sensor
Each pressure sensor circuit
Brake actuatorC1222/46
(DI±392)Malfunction in rear (RR) pressure sensor
Brake actuator
C1241/41
(DI±397)Low or abnormally high battery positive voltage in IG1 circuit
Battery
Charging system
Power source circuit
C1242/42*2
(DI±400)Open circuit in IG2 circuit
Battery
Charging system
Power source circuit
C1246/46
(DI±392)Malfunction in master cylinder (M/C) pressure sensorMaster cylinder (M/C) pressure sensor
Master cylinder (M/C) pressure sensor circuit
C1249/49
(DI±403)Open circuit in stop light switch circuitStop light switch
Stop light switch circuit
C1251/51*2
(DI±406)Malfunction in hydraulic brake booster pump motorHydraulic brake booster pump motor
C1252/52*2
(DI±409)Hydraulic brake booster pump motor ON time abnormally long
Hydraulic brake booster pump motor
Hydraulic brake booster pump motor circuit
Pressure switch (PH or PL)
C1253/53*2
(DI±416)Malfunction in hydro motor relay circuitHydro motor relay
Hydro motor relay circuit
C1254/54*2
(DI±421)Malfunction in pressure switchPressure switch (PH or PL)
Pressure switch circuit
C1256/56*2
(DI±424)Malfunction of accumulator low pressure
Accumulator
Pressure switch (PH or PL)
Hydraulic brake booster pump motor
C1257/57*2
(DI±430)Malfunction in power supply drive circuitBattery
Power Source circuit
C1259/59
(DI±433)Malfunction in regenerative of HV ECUHV control system
HV ECU
Always ON
(DI±434)Malfunction in brake ECU
Battery
Charging system
Power source circuit
Brake ECU
*1: As the DTC cannot be erased by replacing parts alone do either of the following operations.
(1) Clear DTC (See page DI±353).
(2) At the vehicle speed of 20 km/h (12 mph), drive the vehicle for 30 sec. or more.
*
2: Using the following table, troubled parts can be specified.
Page 945 of 1943
ECU
Power source* Hydraulic brake booster Motor relay circuit Accumulator malfunction
Pump motor circuit Pressure switchPH
PL
Pump motor
MTT wire harness
MT+ wire harness
MT± wire harness
MR1 open circuit
MR2 open circuit
MR1 welded contact
MR2 welded contact
Pressure leaks
IG2 open circuit
Power suplly circuit
Light Buzzer Light Light Light Light Light LightBuzzer Buzzer Buzzer Buzzer Buzzer Buzzer
DTC
BRAKE warning light and buzzerC1242/42
C1251/51 C1252/52 C1253/53C1254/54
C1256/56C1257/57
*: When IG1 circuit is open, ABS warning light and BRAKE warning light come on.
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
DI±365
2001 PRIUS (RM778U)
Table of Trouble Part and DTC:
Page 946 of 1943
DI1GG±06
F02094
B13 B12
B11 B10
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
DI±367
2001 PRIUS (RM778U)
TERMINALS OF ECU
Symbols (Terminals No.)Wiring ColorConditionSTD Voltage (V)
SFRH (B10 ± 1) ± GND (B10 ±
6, 31, B11 ± 8, 17)R±B e W±BIG switch ON, ABS warning light OFF10 ± 14
SFRR (B10 ± 2) ± GND (B10 ±
6, 31, B11 ± 8, 17)R±W e W±BIG switch ON, ABS warning light OFF10 ± 14
SMC2 (B10 ± 3) ± GND (B10 ±
6, 31, B11 ± 8, 17)G±B e W±BIG switch ON, ABS warning light OFF (Brake pedal released)10 ± 14
SMC1 (B10 ± 4) ± GND (B10 ±
6, 31, B11 ± 8, 17)G±W e W±BIG switch ON, ABS warning light OFF (Brake pedal released)10 ± 14
SS (B10 ± 5) ± GND (B10 ± 6,
31, B11 ± 8, 17)G±O e W±BIG switch ON, ABS warning light OFF (Brake pedal released)10 ± 14
SFLR (B10 ± 7) ± GND (B10 ±
6, 31, B11 ± 8, 17)R±G e W±BIG switch ON, ABS warning light OFF10 ± 14
SRRH (B10 ± 8) ± GND (B10 ±
6, 31, B11 ± 8, 17)R±Ye W±BIG switch ON, ABS warning light OFF10 ± 14
SRRR (B10 ± 9) ± GND (B10 ±
6, 31, B11 ± 8, 17)R±L e W±BIG switch ON, ABS warning light OFF10 ± 14
VCM (B10 ± 10) ± GND (B10 ±
6, 31, B11 ± 8, 17)B e W±BIG switch ON4.5 ± 5.5
PH (B10 ± 11) ± GND (B10 ± 6,GRWBVehicle stops, pump motor rotates5 ± 7PH (B10 11 ) GND (B10 6,
31, B11 ± 8, 17)GR eW±BVehicle stops, pump motor stopsBelow 1.0
SG1 (B10 ± 12) ± GND (B10 ±
6, 31, B11 ± 8, 17)Shielded eW±BIG switch OFFContinuity
FR+ (B10 ± 14) ± FR± (B10 ±
13)P e LIG switch ON, slowly turn right front wheelPulse generation
FL+ (B10 ± 16) ± FL± (B10 ±
15)R e GIG switch ON, slowly turn left front wheelPulse generation
MT± (B10 ± 18) ± GND (B10 ±
6, 31, B11 ± 8, 17)Y e W±BIG switch OFFContinuity
SR (B10 ± 19) ± GND (B10 ± 6,
31, B11 ± 8, 17)B±L e W±BIG switch ON, ABS warning light OFFBelow 1.5
SFLH (B10 ± 21) ± GND (B10 ±
6, 31, B11 ± 8, 17)Y±B e W±BIG switch ON, ABS warning light OFF10 ± 14
PMC (B10 ± 22) ± GND (B10 ±
6, 31, B11 ± 8, 17)W e W±BIG switch ON, stop light switch OFFBelow 1.0
E2 (B10 ± 23) ± GND (B10 ± 6,
31, B11 ± 8, 17)R e W±BIG switch OFFContinuity
FSS (B10 ± 24) ± GND (B10 ±
6, 31, B11 ± 8, 17)BR e W±BIG switch OFFContinuity
Page 947 of 1943
DI±368
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
2001 PRIUS (RM778U) MTT (B10 ± 27) ± GND (B10 ±
WLWBIG switch ON, pump motor rotatesAbove 8.0MTT (B10 27) GND (B10
6, 31, B11 ± 8, 17)W±L e W±BIG switch ON, pump motor stopsBelow 1.5
MT+ (B10 ± 28) ± GND (B10 ±
6, 31, B11 ± 8, 17)Y±G e W±BIG switch ON (Motor relay is OFF)Below 1.5
MR1 (B10 ± 29) ± GND (B10 ±
6, 31, B11 ± 8, 17)LG±R e W±BIG switch ON, ABS motor stops10 ± 14
STP (B11 ± 1) ± GND (B10 ± 6,GWWBStop light switch OFFBelow 1.5STP (B11 1) GND (B10 6,
31, B11 ± 8, 17)G±W e W±BStop light switch ON8 ± 14
SP1 (B11 ± 2) ± GND (B10 ± 6,
31, B11 ± 8, 17)V±R e W±BVehicle driving at about 30 km/h (19 mph)Pulse generation
Tc (B11 ± 3) ± GND (B10 ± 6,
31, B11 ± 8, 17)P±B e W±BIG switch ON10 ± 14
Ts (B11 ± 4) ± GND (B10 ± 6,
31, B11 ± 8, 17)GR±G e W±BIG switch ON10 ± 14
BRL (B11 ± 5) ± GND (B10 ± 6,
31, B11 ± 8, 17)R±Y e W±BIG switch OFF " ON (Parking brake switch OFF)10 ± 14 for about 3
sec., then Below 2
IG1 (B11 ± 6) ± GND (B10 ± 6,
31, B11 ± 8, 17)B±Y e W±BIG switch ON10 ± 14
R1+ (B11 ± 7) ± GND (B10 ± 6,
31, B11 ± 8, 17)Y±B e W±BIG switch ON10 ± 14
D/G (B11 ± 10) ± GND (B10 ±
6, 31, B11 ± 8, 17)W±L e W±BIG switch ON10 ± 14
RR+ (B11 ± 11) ± RR± (B11 ±
12)Y e BRIG switch ON, slowly turn right rear wheelPulse generation
HVO+ (B11 ± 14) ± GND (B10
± 6, 31, B11 ± 8, 17)G e W±BIG switch ONAbout 2.5
RLO (B11 ± 15) ± GND (B10 ±
6, 31, B11 ± 8, 17)W e W±BVehicle driving at about 30 km/h (19 mph)Pulse generation
HVI± (B11 ± 16) ± GND (B10 ±
6, 31, B11 ± 8, 17)V e W±BIG switch ONAbout 2.5
WA (B11 ± 18) ± GND (B10 ± 6,BWWBIG switch ON, ABS warning light ON10 ± 14WA (B11 18) GND (B10 6,
31, B11 ± 8, 17)B±W e W±BIG switch ON, ABS warning light OFFBelow 2.0
RL+ (B11 ± 19) ± RL± (B11 ±
20)P e LIG switch ON, slowly turn left rear wheelPulse generation
RSS (B11 ± 21) ± GND (B10 ±
6, 31, B11 ± 8, 17)BR±B e W±BIG switch OFFContinuity
HVO± (B11 ± 22) ± GND (B10 ±
6, 31, B11 ± 8, 17)R e W±BIG switch ONAbout 2.5
RRO (B11 ± 23) ± GND (B10 ±
6, 31, B11 ± 8, 17)B e W±BVehicle driving at about 30 km/h (19 mph)Pulse generation
HVI+ (B11 ± 24) ± GND (B10 ±
6, 31, B11 ± 8, 17)LG e W±BIG switch ONAbout 2.5
IG2 (B12 ± 1) ± GND (B10 ± 6,
31, B11 ± 8, 17)B±W e W±BIG switch ON10 ± 14
LBL (B12 ± 7) ± GND (B10 ± 6,
31, B11 ± 8, 17)LG±R e W±BIG switch ON, fluid in master cylinder reservoir above MIN level4.5 ± 6.4
VFR (B12 ± 9) ± GND (B10 ± 6,
31, B11 ± 8, 17)B e W±BIG switch ON4.5 ± 5.5
PKB (B12 ± 13) ± GND (B10 ±RYWBIG switch ON, parking brake switch ONBelow 1.5PKB (B12 13) GND (B10
6, 31, B11 ± 8, 17)R±Y e W±BIG switch ON, parking brake switch OFF10 ± 14
Page 948 of 1943
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
DI±369
2001 PRIUS (RM778U) SG2 (B12 ± 15) ± GND (B10 ±
6, 31, B11 ± 8, 17)
Shielded e W±BIG switch OFFContinuity
VREG (B12 ± 16) ± GND (B10
± 6, 31, B11 ± 8, 17)B e W±BIG switch ON4.5 ± 5.5
SG3 (B12 ± 18) ± GND (B10 ±
6, 31, B11 ± 8, 17)Shielded e W±BIG switch OFFContinuity
BZ (B12 ± 20) ± GND (B10 ± 6,GWBIG switch ON, buzzer soundsBelow 1.5BZ (B12 20) GND (B10 6,
31, B11 ± 8, 17)G e W±BIG switch ON, buzzer does not sound10 ± 14
EREG (B12 ± 24) ± GND (B10
± 6, 31, B11 ± 8, 17)R e W±BIG switch OFFContinuity
PREG (B12 ± 25) ± GND (B10
± 6, 31, B11 ± 8, 17)W e W±BIG switch ON, brake pedal releasedBelow 1.0
EFR (B12 ± 27) ± GND (B10 ±
6, 31, B11 ± 8, 17)R e W±BIG switch OFFContinuity
PFR (B12 ± 28) ± GND (B10 ±
6, 31, B11 ± 8, 17)W e W±BIG switch ON, brake pedal releasedBelow 1.0
SLA+ (B13 ± 1) ± GND (B10 ±
6, 31, B11 ± 8, 17)L e W±BIG switch ONPulse generation
MR2 (B13 ± 2) ± GND (B10 ± 6,YGWBIG switch ON, pump motor rotatesBelow 1.0MR2 (B13 2) GND (B10 6,
31, B11 ± 8, 17)Y±G e W±BIG switch ON, pump motor stops10 ±14
R2+ (B13 ± 3) ± GND (B10 ± 6,
31, B11 ± 8, 17)L±O e W±BIG switch ON10 ± 14
VRR (B13 ± 5) ± GND (B10 ± 6,
31, B11 ± 8, 17)B e W±BIG switch ON4.5 ± 5.5
AST (B13 ± 6) ± GND (B10 ± 6,
31, B11 ± 8, 17)B±O e W±BIG switch ON, ABS warning light OFF10 ± 14
SLR± (B13 ± 7) ± GND (B10 ±
6, 31, B11 ± 8, 17)V e W±BIG switch ONBelow 1.5
SLA± (B13 ± 8) ± GND (B10 ±
6, 31, B11 ± 8, 17)LG e W±BIG switch ONBelow 1.5
PL (B13 ± 9) ± GND (B10 ± 6,
31, B11 ± 8, 17)Y±R e W±BIG switch OFF, depress brake pedal more than 40 times " IG
switch ON6.5 ± 10 " 2.5 ± 5.0
PRR (B13 ± 13) ± GND (B10 ±
6, 31, B11 ± 8, 17)W e W±BIG switch ON, brake pedal releasedBelow 1.0
SLR+ (B13 ± 16) ± GND (B10 ±
6, 31, B11 ± 8, 17)P e W±BIG switch ONPulse generation
SG4 (B13 ± 19) ± GND (B10 ±
6, 31, B11 ± 8, 17)Shielded e W±BIG switch OFFContinuity
ERR (B13 ± 20) ± GND (B10 ±
6, 31, B11 ± 8, 17)R e W±BIG switch OFFContinuity
+BS (B13 ± 22) ± GND (B10 ±
6, 31, B11 ± 8, 17)Le W±BIG switch ON10 ± 14
Page 963 of 1943
F12673
B±G
F111
L4 Instrument
Panel J/B
DC/DC FL Block No. 1
3
Brake
Combination Meter
W±B
Brake Fluid
Level Warning
Switch7Brake ECU
LBL
C11
J7
J/C AM1162K
IE 2A
ID22B11
WR±Y
MAINLG±R
12
14
A W±G B±Y
IG1
RelayBRL
B12
C11
C10
C105 Body ECU
B8 B8
15
BR2
2 W±B
A A
J1
J/C AW±BInstrument
Panel J/B
Battery FL
Block
No. 21
F13
Ignition Switch
24
2H 2B 2D
2K2A 5 1
3 6
5 1
3
27
8GAUGE
LMultiplex Communication Circuit
IH 2B 6 1
J11
J/CGR±B GR
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
DI±385
2001 PRIUS (RM778U)
DTC C1202/58 Brake Fluid Warning Switch Circuit
CIRCUIT DESCRIPTION
The brake fluid level warning switch sends the appropriate signal to the ECU when the brake fluid level drops.
HINT:
Depressing the parking brake pedal also turns on the brake warning light but does not diagnose DTC No.
C1202/58.
DTC No.DTC Detecting ConditionTrouble Area
C1202/58
When any of the following 1. 2. or 3. is detected:
1. When the ignition switch is ON, an open condition in the
reservoir level switch circuit continues for 2 sec. or
more.
2. While a vehicle is driven at a speed of 3 km/h (5 mph) or
more, decrease in the reservoir level continues for 10
sec. or more.
3. While a vehicle is stopped, decrease in the reservoir
level continues for 5 sec. or more.
Brake fluid level
Brake fluid level warning switch
Brake fluid level warning switch circuit
WIRING DIAGRAM
DI1GZ±10