2001 TOYOTA PRIUS display

F12396
DLC3
TOYOTA hand±held tester
A04550
DLC3
912 3 4 56 78
16 15 14 13 12 11 10
DI±316
± DIAGNOSTICSHV BATTERY CONTROL SYSTEM
2001 PRIUS (RM778U)

To check the Diagnostic Trouble Codes (DTC), con-
nect the TOYOTA hand±held tester to the Data Link
Connector 3 (DLC3) on the vehicle. The TOYOTA
hand±held tester also enables you to erase the
DTC and check freeze frame data and various
forms of THS data.

Freeze frame data:
Freeze frame data records the battery condition
when a malfunction is detected.
When troubleshooting, this is useful for knowing the
battery condition.
(b) Check the DLC3.
The HV control ECU conforms to ISO 14230 for commu-
nication.
The terminal arrangement of the DLC3 complies with
SAEJ1962 and matches the ISO 14230 format.
Terminal No.Connection/Voltage or ResistanceCondition
7Bus
Line/Pulse generationDuring transmission
4Chassis Ground e Body Ground/1 W or lessAlways
5Signal Ground e Body Ground/1 W or lessAlways
16Battery Positive e Body Ground/10 ± 15 VAlways
HINT:
If your display shows UNABLE TO CONNECT TO VEHICLE
when you have connected the cable of the TOYOTA hand±held
tester to the DLC3, turned the motor switch ON and operated
the tester, there is a problem in the vehicle or tool.

If communication is normal when the tool is connected to
another vehicle, inspect the DLC3 on the original vehicle.

If communication is still not possible when the tool is con-
nected to another vehicle, the problem is probably in the
tool itself, so consult the Service Department.
3. INSPECT DIAGNOSIS
(a) Check the auxiliary battery.
(1) Measure the voltage of the auxiliary battery.
Voltage: 10 ± 15 V

F12396
DLC3
TOYOTA hand±held tester
DI±318
± DIAGNOSTICSHV BATTERY CONTROL SYSTEM
2001 PRIUS (RM778U)
(d) Clear DTC after completion of repair.
(1) Connect the TOYOTA hand±held tester to the
DLC3.
HINT:
Before clearing, check that DTC for the HV battery ECU, DTC
for the ECU which is related with freeze frame data and the
freeze frame data are recorded.
(2) Operate the TOYOTA hand±held tester to erase the
DTC (See the TOYOTA hand±held tester opera-
tor 's manual.).
4. CHECK FOR INTERMITTENT PROBLEMS
(a) Perform a simulation test (See page IN±30).
HINT:
In the simulation test, reproduce the condition at trouble occurrence based on the customer's comments and
the freeze frame data recorded with the DTC.
(b) Check the connector and terminal (See page IN±41).
(c) Handle the connector (See page IN±41).
5. TOYOTA HAND±HELD TESTER DISPLAY ITEMS
TOYOTA hand±held tester displayMeasurement Item
BATTERY SOCBattery State of charge
ONB CHARGE TIMECumulative number of times of on±board equalizing charging
BATTERY LO TIMECumulative number of times of battery dies
DC INHIBIT TIMECumulative number of times of discharge inhibition
IB MAIN BATTERYIB main battery current (with correction)
BATT BLOCK V#Battery block voltage
BAT BLOCK MIN VBattery block minimum voltage
MIN BAT BLOCK #Minimum voltage battery block
BAT BLOCK MAX VBattery block maximum voltage
MAX BAT BLOCK #Maximum voltage battery block
BATT INSIDE AIRAmbient temperature inside battery pack
BATTERY TOO HI #Cumulative number of times of too±high battery voltage
VMF FAN VOLTAGEBattery cooling fan voltage
AUX. BATT VAuxiliary battery voltage
WINCharge restriction value
WOUTDischarge restriction value
DELTA SOCDifference between MAX. and MIN. values of SOC at every battery block.
SBLW FAN ST RQSSBL cooling fan stop request signal
COOLING FAN HICooling fan operation in high speed
COOLING FAN MIDCooling fan operation in middle speed
COOLING FAN LOCooling fan operation in low
CCTLOff±board equalizing charge control signal
EQC0 DF RELAYEQC0 dead front relay
EQTR CHARGE STEQTR uniform charging start signal
ONBORD CHARGEOn±board equalizing charging status
PRE ONBORDE CHPre±On±board charging status
NORMAL STATUSNormal status
INSIDE RESIST #Inside resistance

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

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.

DI28U±10
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
DI±363
2001 PRIUS (RM778U)
DIAGNOSTIC TROUBLE CODE CHART
NOTICE:
When removing the part, turn the ignition switch OFF.
HINT:

Using SST 09843±18040, connect the terminals Tc and CG of DLC3.

If any abnormality is not found when inspecting parts, inspect the ECU.

If a malfunction code is displayed during the DTC check, check the circuit listed that code. For details
of each code, turn to the page referred to under the ºSee pageº for respective ºDTC No.º in the DTC
chart.
DTC No.
(See Page)Detection ItemTrouble Area
C0200/31*1
(DI±366)Right front wheel speed sensor signal malfunction
C0205/32*1
(DI±366)Left front wheel speed sensor signal malfunction
Right front, left front, right rear and left rear speed sensor
Eh d i itC0210/33*1
(DI±366)Right rear wheel speed sensor signal malfunction

Each speed sensor circuit

Sensor rotor
C0215/34*1
(DI±366)Left rear wheel speed sensor signal malfunction
C0226/21
(DI±373)Malfunction in ABS solenoid (SFR) circuit
SFRR or SFRH circuit

Brake actuator
C0236/22
(DI±373)Malfunction in ABS solenoid (SFL) circuit
SFLR or SFLH circuit

Brake actuator
C0246/23
(DI±373)Malfunction in ABS solenoid (SR) circuit
SRR or SRH circuit

Brake actuator
C0278/11
(DI±376)Open circuit in ABS solenoid relay circuit
ABS solenoid relay
C0279/12
(DI±376)Short circuit in ABS solenoid relay circuit

ABS solenoid relay

ABS solenoid relay circuit
C1202/58
(DI±380)Brake fluid level low
Open circuit in brake fluid level warning switch circuit
Brake fluid level

Brake fluid level warning switch

Brake fluid level warning switch circuit
C1211/61
(DI±382)Malfunction in linear solenoid (SLA) circuit
SLA+ or SLA± circuit

Brake actuator
C1212/62
(DI±382)Malfunction in linear solenoid (SLR) circuit
SLR+ or SLR± circuit

Brake actuator
C1213/63
(DI±384)Malfunction in HV ECU communication circuit

HVI+ or HVI± circuit

HVO+ or HVO± circuit

HV ECU
C1214/64
(DI±386)Malfunction in hydraulic system

Each pressure sensor

Each pressure sensor circuit

Fluid leakage
C1215/15
(DI±387)Low positive voltage of linear solenoid
Battery
Ch i tC1216/16
(DI±387)High positive voltage of linear solenoid

Charging system

Power source circuit
C1217/25
(DI±373)Malfunction in regenerative solenoid (SMC1) circuit
Regenerative solenoid (SMC1) circuit

Brake actuator
C1218/26
(DI±373)Malfunction in regenerative solenoid (SMC2) circuit
Regenerative solenoid (SMC2) circuit

Brake actuator

R14205
1
2
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
DI±373
2001 PRIUS (RM778U)
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 in case of using the TOYOTA hand±held tester and start from step 2 in case
of not using the TOYOTA hand±held tester.
1 Check output value of speed sensor.
PREPARATION:
(a) Connect the TOYOTA hand±held tester to the DLC3.
(b) Turn the ignition switch ON, and push the TOYOTA hand±held tester main switch ON.
(c) Select the DATALIST mode on the TOYOTA hand±held tester.
CHECK:
Check that there is no difference between the speed value output from the speed sensor displayed on the
TOYOTA hand±held tester and the speed value displayed on the speedometer when driving the vehicle.
OK:
There is almost no difference from the displayed speed value.
HINT:
There is tolerance of ± 10 % in the speedometer indication.
OK Check and replace brake ECU.
NG
2 Check speed sensor.
Front:
PREPARATION:
(a) Remove the front fender liner.
(b) Make sure that there is no looseness at the connector
lock part and connecting part of the connector.
(c) Disconnect the speed sensor connector.
CHECK:
Measure resistance between terminals 1 and 2 of speed sensor
connector.
OK:
Resistance: 0.6 ± 2.5 kW
CHECK:
Measure resistance between terminals 1 and 2 of speed sensor
connector and body ground.
OK:
Resistance: 10 MW or higher

F10937
GND+BS
DI±394
± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
2001 PRIUS (RM778U)
3 Check voltage of the ECU +BS power source.
In case of using the TOYOTA hand±held tester:
PREPARATION:
(a) Connect the TOYOTA hand±held tester to the DLC3.
(b) Turn the ignition switch ON, and push the TOYOTA hand±held tester main switch ON.
(c) Select the DATALIST mode on the TOYOTA hand±held tester.
CHECK:
Check the voltage condition output from the ECU displayed on the TOYOTA hand±held tester.
OK:
ºNormalº is displayed.
In case of not using TOYOTA hand±held tester:
PREPARATION:
Remove the ABS ECU with connectors still connected.
CHECK:
Measure voltage between terminals +BS and GND of ABS ECU
connector.
OK:
Voltage: 10 ± 14 V
OK Check and replace brake ECU.
NG
4 Check for open circuit (to +BS) in harness and connector between brake ECU
and battery (See page IN±41).
NG Repair or replace harness or connector.
OK

± DIAGNOSTICSANTI±LOCK BRAKE SYSTEM WITH EBD & RBS
DI±399
2001 PRIUS (RM778U)
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 in case of using the TOYOTA hand±held tester and start from step 2 in case
of not using the TOYOTA hand±held tester.
1 Check output value of the each pressure sensor.
PREPARATION:
(a) Connect the TOYOTA hand±held tester to the DLC3.
(b) Turn the ignition switch ON, and push the TOYOTA hand±held tester main switch ON.
(c) Select the DATALIST mode on the TOYOTA hand±held tester.
CHECK:
Check that the brake fluid pressure value of the master cylinder pressure sensor, regulator pressure sensor,
front pressure sensor and rear pressure sensor displayed on the TOYOTA hand±held tester is changing
when depressing the brake pedal.
OK:
Brake fluid pressure value must be changing.
OK Go to step 4.
NG