2001 TOYOTA PRIUS light
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± DIAGNOSTICSHV BATTERY CONTROL SYSTEM
DI±341
2001 PRIUS (RM778U) 4/27/01
DTC P3011±P3029 Battery Block # Malfunction
CIRCUIT DESCRIPTION
Internal resistance of each battery module is measured, detecting battery deterioration for each block, 1 to
19. Nineteen blocks of battery modules are arranged in the order of 1 to 19 from the ECU side.
DTC No.DTC Detecting ConditionTrouble Area
P3011±P3029Battery internal resistance is abnormal.Battery ECU
Battery pack
INSPECTION PROCEDURE
1 Are there any other codes (besides DTC P3011±P3029) being outputs?
YES Go to relevant DTC chart.
NO
2 Check that the block voltage during charging/ discharging.
PREPARATION:
(a) To ensure safety, conduct this test in a wide, clear level area which provides good traction.
(b) Turn ON the ºREADYº light.
(c) Warm up the engine and turn off the A/C switch.
(d) Fully apply the parking brake and chock the 4 wheels.
(e) Connect a TOYOTA hand±held tester to DLC3 and select HV BATTERY and then CURRENT DATA.
(f) Show voltage of the block corresponding to the DTC and other block (any block except the above±
mentioned block).
CHECK:
(a) Keep your left foot pressed firmly on the brake pedal and shift into the R position.
(b) Confirm the engine stopped in the R position. Step on the accelerator pedal until the engine starts,
stepping on the brake pedal firmly.
(c) Release the accelerator pedal when the engine starts. At the same time, monitor the change of the
voltage before engine starting (during discharging) and after engine starting (during charging).
DI82C±01
Page 925 of 1943
A16881
Voltage
Other block voltage
Voltage of the block
corresponding to the DTC
Discharging (engine stops) Charging (engine starts)A: 0.3 V or more A
B: 0.3 V or more B
Time
DI±342
± DIAGNOSTICSHV BATTERY CONTROL SYSTEM
2001 PRIUS (RM778U)
OK:
Before or after switch±over from discharging to charging, the relationship of the voltage size
are reversed and the difference of the voltage is 0.3 V ore more.
OK Go to step 5.
NG
3 Check that the HV battery blocks voltage swings at stall test.
PREPARATION:
(a) To ensure safety, conduct this test in a wide, clear level area which provides good traction.
(b) Turn ON the ºReadyº light.
(c) Warm up the engine and turn off the A/C switch.
(d) Fully apply the parking brake and chock the 4 wheels.
(e) Connect a TOYOTA hand±held tester to DLC3 and select HV BATTERY and then CURRENT DATA
to show ºBAT BLOCK MIN Vº and ºBAT BLOCK MAX Vº on the TOYOTA hand±held tester.
CHECK:
(a) Keep your left foot pressed firmly on the brake pedal and shift into the R position.
(b) Stepping on the brake pedal, release the accelerator pedal during the engine moving and step on the
accelerator pedal during the engine stopping.
(c) Continue STEP (b) for more than 20 min. and monitor the swing and the difference of the voltage be-
tween the data MAX V and MIN V.
Page 928 of 1943
± DIAGNOSTICSHV BATTERY CONTROL SYSTEM
DI±345
2001 PRIUS (RM778U)
INSPECTION PROCEDURE
1 Are there any other codes (besides DTC P3030) being outputs?
YES Go to relevant DTC chart.
NO
2 Check voltage of battery block 1 to 19.
CHECK:
Connecting a TOYOTA hand±held tester, check the ECU data.
HINT:
Nineteen blocks of battery modules are arranged in the order of 1 to 19 from the battery ECU side.
OK:
Standard voltage: 2V or more
OK Go to step 4.
NG
3 Check that the HV battery blocks voltage swings at stall test.
PREPARATION:
(a) To ensure safety, conduct this test in a wide, clear level area which provides good traction.
(b) Turn ON the ºREADYº light.
(c) Warm up the engine and turn off the A/C switch.
(d) Fully apply the parking brake and chock the 4 wheels.
(e) Connect a TOYOTA hand±held tester to DLC3 and select HV BATTERY and then CURRENT DATA
to show ºBAT BLOCK MIN Vº and ºBAT BLOCK MAX Vº on the TOYOTA hand±held tester.
CHECK:
(a) Keep your left foot pressed firmly on the brake pedal and shift into the R position.
(b) Stepping on the brake pedal, release the accelerator pedal during the engine moving and step on the
accelerator pedal during the engine stopping.
(c) Continue STEP (b) for more than 20 min. and monitor the swing and the difference of the voltage be-
tween the data MAX V and MIN V.
Page 938 of 1943
DI7OJ±01
F12426
USA:
CANADA:
F09750
DLC3
CG Tc
DI±358
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
2001 PRIUS (RM778U)
PRE±CHECK
1. PRECAUTION
(a) To distinguish trouble and repair it, perform necessary
electrical shock prevention operation (See page
IN±4).
(b) Some portions of the wiring harness belong to the 288 V
circuit, to which a high voltage is supplied. To avoid re-
ceiving an electrical shock, be sure to observe the follow-
ing:
(1) Wear insulating gloves during inspection.
(2) Before removing or installing parts and connectors,
remove the service plug and conform that the volt-
age at the output terminals has dropped down to 0
V.
(3) When disengaging wiring connectors, hold the con-
nector bodies to avoid pulling the wires. When en-
gaging wiring connectors, be sure to engage them
securely.
2. DIAGNOSIS SYSTEM
(a) Release the parking brake pedal.
(b) Check the indicator.
When the ignition switch is turned ON, check that the ABS
warning light and BRAKE warning light goes on for
approx. 3 seconds.
HINT:
When the parking brake is applied or the level of the brake
fluid is low, the BRAKE warning light is lit.
If the indicator check result is not normal, proceed to trou-
bleshooting for the ABS warning light circuit or BRAKE
warning light circuit (See page DI±437 or DI±441).
(c) Check the warning buzzer.
When depressing the brake pedal repeatedly it may turn
on the brake warning buzzer.
HINT:
If the warning buzzer check result is not normal, proceed to
troubleshooting for the brake warning buzzer circuit (See page
DI±444).
(d) In case of not using TOYOTA hand±held tester:
Check the DTC.
(1) Using SST, connect terminals Tc and CG of DLC3.
SST 09843±18040
(2) Turn the ignition switch ON.
(3) Read the DTC from the ABS warning light on the
combination meter.
HINT:
If no code appears, inspect the diagnostic circuit or ABS
warning light circuit (See page DI±437 or DI±447).
Page 939 of 1943
R01346
Normal Code
0.25 sec.
0.25 sec. 2 sec.
ON
OFF
ON
OFF0.5 sec. 0.5 sec.
Code 11 and 21
4 sec.1.5 sec.
2.5 sec.
Code 11 Code 21
F12396
TOYOTA
Hand±held Tester
DLC3
BR3890
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
DI±359
2001 PRIUS (RM778U)
As an example, the blinking patterns for normal code and
codes 11 and 21 are shown on the left.
(4) Codes are explained in the code table on page
DI±358.
(5) After completing the check, disconnect terminals Tc
and CG, and turn off the display.
If 2 or more malfunctions are indicated at the same time the low-
est numbered DTC will be displayed 1st.
(e) In case of using TOYOTA hand±held tester:
Check the DTC.
(1) Hook up the TOYOTA hand±held tester to the
DLC3.
(2) Turn the ignition switch ON.
(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.
(f) In case of not using TOYOTA hand±held tester:
Clear the DTC.
(1) Using SST, connect terminals Tc and CG of DLC3.
SST 09843±18040
(2) Turn the ignition switch ON.
(3) Clear the DTC stored in ECU by depressing the
brake pedal 8 or more times within 5 seconds.
(4) Check that the warning light shows the normal
code.
(5) Remove the SST from the terminals of DLC3.
SST 09843±18040
Page 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.