Page 1042 of 1943
DI±472
± DIAGNOSTICSELECTRIC MOTOR POWER STEERING
2001 PRIUS (RM778U)
NG Check and replace power steering gear assem-
bly with motor (See page SR±17).
OK
4 Check for open and short circuit in harness and connector between terminals
VT
1 of torque sensor connector and TRQ1 of EMPS ECU connector, VT2 of torque
sensor connector and TRQ
2 of EMPS ECU connector (See page IN±41).
NG Repair and replace harness or connector.
OK
Check and replace EMPS ECU.
Page 1043 of 1943
DI±474
± DIAGNOSTICSELECTRIC MOTOR POWER STEERING
2001 PRIUS (RM778U)
DTC C1516/16 Calibration of Torque Sensor Zero Point Not
Completed
CIRCUIT DESCRIPTION
This DTC does not indicated trouble. This is detected when the torque sensor zero point calibration is not
completed normally.
DTC No.DTC Detecting ConditionTrouble Area
C1516/16This is detected when the torque sensor zero point calibra-
tion is not completed normally.±
INSPECTION PROCEDURE
1 Perform calibration of torque sensor zero point (See page DI±454).
2 Is DTC C1516/16 output?
Check DTC on page DI±460.
NO No problem.
YES
3 Is DTC C1532/32 output?
YES Check and replace EMPS ECU.
NO
4 Perform calibration of torque sensor zero point again (See page DI±454).
DI7R3±01
Page 1047 of 1943
F12836
B11
E6 10
4EMPS ECU
WRL
WRR (Shielded)
W
B 15
J/C
J18 J19AA
W±B J17 J/C
A
IGE6
B1123 RLO
RRO BRAKE ECU
± DIAGNOSTICSELECTRIC MOTOR POWER STEERING
DI±479
2001 PRIUS (RM778U)
DTCC1541/41±C1543/43Speed Sensor Malfunction
DTC
C1571/71, C1572/72 Speed Sensor Malfunction (Test Mode)
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1541/41Speed sensor
C1542/42Speed sensor malfunction
Speed sensor
Brake ECU
C1543/43
S eed sensor malfunctionBrake ECU
EMPS ECU
C1571/71S d lf ti (T t d )
Right rear or left rear speed sensor
Sensor installation
Ri
ght rear or left rear speed sensor rotorC1571/71
C1572/72Speed sensor malfunction (Test mode)Right rear or left rear s eed sensor rotor
Right rear or left rear speed sensor circuit
Brake ECU
EMPS ECU
WIRING DIAGRAM
DI7R6±01
Page 1064 of 1943
F12844
EMPS ECU
Ts
E69
B BJ16
J/C
3
ID1 GR±G
14
Ts
5
SGBR14
ID2BR
BR 14
IO1
EB DLC3
GR±G GR±G DI±498
± DIAGNOSTICSELECTRIC MOTOR POWER STEERING
2001 PRIUS (RM778U)
Ts Terminal Circuit
CIRCUIT DESCRIPTION
The sensor check circuit detects abnormalities in the speed sensor signal which cannot be detected by the
DTC check.
Connecting terminals Ts and CG of the DLC3 starts the check.
WIRING DIAGRAM
DI7RF±01
Page 1066 of 1943
DI6OY±07
H15218
H10658
DLC3
CG Tc
DI±502
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
2001 PRIUS (RM778U)
PRE±CHECK
1. SRS WARNING LIGHT CHECK
(a) Turn the ignition switch to the ON position and check that
the SRS warning light lights up.
(b) Check that the SRS warning light goes out after approx.
6 seconds.
HINT:
When the ignition switch is at ON and the SRS warning
light remains on or flashes, the airbag sensor assembly
has detected a malfunction code.
If, after approx. 6 seconds have elapsed, the SRS warn-
ing light sometimes lights up or the SRS warning light
lights up even when the ignition switch is OFF, a short in
the SRS warning light circuit can be considered likely.
Proceed to ºSRS warning light circuit malfunctionº on
page DI±632.
2. DTC CHECK (Using diagnosis check wire)
(a) Present troubles codes:
Output the DTC.
(1) Turn the ignition switch to the ON position and wait
for approx. 20 seconds.
(2) Using SST, connect terminals Tc and CG of the
DLC3.
SST 09843±18020
NOTICE:
Pay due attention to the terminal connecting position to
avoid a malfunction.
(b) Past troubles codes:
Output the DTC.
(1) Using service wire, connect terminals Tc and CG of
the DLC3.
SST 09843±18020
(2) Turn the ignition switch to the ON position and wait
for approx. 20 seconds.
NOTICE:
Pay due attention to the terminal connecting position to
avoid a malfunction.
Page 1070 of 1943
H15711
Airbag
Sensor
Assembly2
37
10
121
45
6
8
16
9
14
15
Side Airbag
Assembly (RH) (Squib)
Seat Belt
Pretensioner (RH) Side Airbag Sensor
Assembly (RH)
Front Airbag Sensor (RH)
Front Passenger Airbag
Assembly (Squib)
Spiral Cable
Steering Wheel
Pad (Squib)
Front Airbag Sensor (LH)
Side Airbag Sensor
Assembly (LH) Seat Belt
Pretensioner (LH)
Side Airbag
Assembly (LH) (Squib) 13
11
DI±506
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
2001 PRIUS (RM778U)
Page 1071 of 1943
H01356H01233AB0130AB0045AB0046H02248
H02249H11587
Airbag Sensor Assembly Connector
Short SpringShort SpringShort Spring
Before ReleaseAfter Release
Connector
Connector
Short SpringShort Spring
Before Release
Paper
After Release
Paper
4
Paper
213
814
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±507
2001 PRIUS (RM778U)
Page 1072 of 1943
DI6OZ±06
DI±508
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
2001 PRIUS (RM778U)
DIAGNOSTIC TROUBLE CODE CHART
If a malfunction code is displayed during the DTC check, check the circuit listed for that code in the table
below (Proceed to the page given for that circuit.).
DTC No.
(See Page)Detection ItemTrouble AreaSRS
Warning Light
B0100/13
(DI±510)
Short in D squib circuitSteering wheel pad (squib)
Spiral cable
Airbag sensor assembly
Wire harness
ON
B0101/14
(DI±515)
Open in D squib circuitSteering wheel pad (squib)
Spiral cable
Airbag sensor assembly
Wire harness
ON
B0102/11
(DI±519)
Short in D squib circuit (to ground)Steering wheel pad (squib)
Spiral cable
Airbag sensor assembly
Wire harness
ON
B0103/12
(DI±523)
Short in D squib circuit (to B+)Steering wheel pad (squib)
Spiral cable
Airbag sensor assembly
Wire harness
ON
B0105/53
(DI±527)Short in P squib circuitFront passenger airbag assembly (squib)
Airbag sensor assembly
Wire harness
ON
B0106/54
(DI±531)Open in P squib circuitFront passenger airbag assembly (squib)
Airbag sensor assembly
Wire harness
ON
B0107/51
(DI±534)Short in P squib circuit (to ground)Front passenger airbag assembly (squib)
Airbag sensor assembly
Wire harness
ON
B0108/52
(DI±537)Short in P squib circuit (to B+)Front passenger airbag assembly (squib)
Airbag sensor assembly
Wire harness
ON
B0110/43
(DI±540)Short in side squib (RH) circuitSide airbag assembly RH (squib)
Airbag sensor assembly
Wire harness
Blink
B0111/44
(DI±544)Open in side squib (RH) circuitSide airbag assembly RH (squib)
Airbag sensor assembly
Wire harness
Blink
B0112/41
(DI±550)Short in side squib (RH) circuit
(to ground)Side airbag assembly RH (squib)
Airbag sensor assembly
Wire harness
Blink
B0113/42
(DI±550)Short in side squib (RH) circuit
(to B+)Side airbag assembly RH (squib)
Airbag sensor assembly
Wire harness
Blink
B0115/47
(DI±553)Short in side squib (LH) circuitSide airbag assembly LH (squib)
Airbag sensor assembly
Wire harness
Blink
B0116/48
(DI±557)Open in side squib (LH) circuitSide airbag assembly LH (squib)
Airbag sensor assembly
Wire harness
Blink
