TOYOTA PRIUS 2001 Service Repair Manual

H01227H02145H02254
P Squib
Airbag
Sensor
Assembly
(+)
(±)P+
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±539
2001 PRIUS (RM778U)
DTC B0107/51 Short in P Squib Circuit (to Ground)
CIRCUIT DESCRIPTION
The P squib circuit consists of the airbag sensor assembly and front passenger airbag assembly.
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
For details of the function of each component, see OPERATION on page RS±2.
DTC B0107/51 is recorded when ground short is detected in the P squib circuit.
DTC No.DTC Detecting ConditionTrouble Area
B0107/51

Short circuit in P squib wire harness (to ground)

P squib malfunction

Airbag sensor assembly malfunction
Front passenger airbag assembly (P squib)

Airbag sensor assembly

Wire harness
WIRING DIAGRAM
See page DI±527.
INSPECTION PROCEDURE
1 Prepare for inspection (See step 1 on page DI±629).
2 Check P squib circuit.
CHECK:
For the connector (on the front passenger airbag assembly
side) between the front passenger airbag assembly and the air-
bag sensor assembly, measure the resistance between P+ and
body ground.
OK:
Resistance: 1 MW or Higher
NG Repair or replace harness or connector be-
tween front passenger airbag assembly and air-
bag sensor assembly.
OK
DI6P9±01

AB0118H01023
H01075 H02144H10600H10615
P Squib
Airbag
Sensor
Assembly
P+
P±
DLC3
ON " u
Code B0107/51
Tc CG
DI±540
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
2001 PRIUS (RM778U)
3 Check airbag sensor assembly.
PREPARATION:
(a) Connect the connector to the airbag sensor assembly.
(b) Using a service wire, connect P+ and P± of the connector
(on the front passenger airbag assembly side) between
the front passenger airbag assembly and the airbag sen-
sor assembly.
(c) Connect negative (±) terminal cable to the battery, and
wait at least for 2 seconds.
CHECK:
(a) Turn the ignition switch to ON and wait at least for 20 se-
conds.
(b) Clear the DTC stored in memory (See step 5 on page
DI±497).
(c) Turn the ignition switch to LOCK, and wait at least for 20
seconds.
(d) Turn the ignition switch to ON, and wait at least for 20 se-
conds.
(e) Check the DTC (See page DI±497).
OK:
DTC B0107/51 is not output.
HINT:
Codes other than code B0107/51 may be output at this time, but
they are not relevant to this check.
NG Replace airbag sensor assembly.
OK

AB0119H01024
H01075 H10600H10616
"u
ON
DTC B0107/51
DLC3Airbag
Sensor
Assembly P Squib
Tc CG
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±541
2001 PRIUS (RM778U)
4 Check P squib.
PREPARATION:
(a) Turn the ignition switch to LOCK.
(b) Disconnect negative (±) terminal cable from the battery,
and wait at least for 90 seconds.
(c) Connect the front passenger airbag assembly connector.
(d) Connect negative (±) terminal cable to the battery, and
wait at least for 2 seconds.
CHECK:
(a) Turn the ignition switch to ON, and wait at least for 20 se-
conds.
(b) Clear the DTC stored in memory (See step 5 on page
DI±497).
(c) Turn the ignition switch to LOCK, and wait at least for 20
seconds.
(d) Turn the ignition switch to ON, and wait at least for 20 se-
conds.
(e) Check the DTC (See page DI±497).
OK:
DTC B0107/51 is not output.
HINT:
Codes other than code B0107/51 may be output at this time, but
they are not relevant to this check.
NG Replace front passenger airbag assembly.
OK
From the results of the above inspection, the malfunctioning part can now be considered normal.
To make sure of this, use the simulation method to check. If the malfunctioning part can not be
detected by the simulation method, replace all SRS components including the wire harness.

H01022
H02146AB0119H04524
P SquibAirbag
Sensor
Assembly
(±) (+)P+
ON
DI±542
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
2001 PRIUS (RM778U)
DTC B0108/52 Short in P Squib Circuit (to B+)
CIRCUIT DESCRIPTION
The P squib circuit consists of the airbag sensor assembly and front passenger airbag assembly.
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
For details of the function of each component, see OPERATION on page RS±2.
DTC B0108/52 is recorded when a B+ short is detected in the P squib circuit.
DTC No.DTC Detecting ConditionTrouble Area
B0108/52

Short circuit in P squib wire harness (to B+)

P squib malfunction

Airbag sensor assembly malfunction
Front passenger airbag assembly (P squib)

Airbag sensor assembly

Wire harness
WIRING DIAGRAM
See page DI±527.
INSPECTION PROCEDURE
1 Prepare for inspection (See step 1 on page DI±629).
2 Check P squib circuit.
CHECK:
(a) Turn the ignition switch to ON.
(b) For the connector (on the front passenger airbag assem-
bly side) between the front passenger airbag assembly
and the airbag sensor assembly, measure the voltage be-
tween the P+ and body ground.
OK:
Voltage: 0 V
NG Repair or replace harness or connector be-
tween front passenger airbag assembly and air-
bag sensor assembly.
OK
DI6PA±01

AB0118H01023
H01076 H02144H10600H10617
P Squib
Airbag
Sensor
Assembly
P+
P±
DTC B0108/52
DLC3
ON " u
Tc CG
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±543
2001 PRIUS (RM778U)
3 Check airbag sensor assembly.
PREPARATION:
(a) Connect the connector to the airbag sensor assembly.
(b) Using a service wire, connect P+ and P± of the connector
(on the front passenger airbag assembly side) between
the front passenger airbag assembly and the airbag sen-
sor assembly.
(c) Connect negative (±) terminal cable to the battery, and
wait at least for 2 seconds.
CHECK:
(a) Turn the ignition switch to ON and wait at least for 20 se-
conds.
(b) Clear the DTC stored in memory (See step 5 on page
DI±497).
(c) Turn the ignition switch to LOCK, and wait at least for 20
seconds.
(d) Turn the ignition switch to ON, and wait at least for 20 se-
conds.
(e) Check the DTC (See page DI±497).
OK:
DTC B0108/52 is not output.
HINT:
Codes other than code B0108/52 may be output at this time, but
they are not relevant to this check.
NG Replace airbag sensor assembly.
OK

AB0119H01024
H01076
H10600H10618
"u
ON
DTC B0108/52
DLC3Airbag
Sensor
Assembly P Squib
Tc CG
DI±544
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
2001 PRIUS (RM778U)
4 Check P squib.
PREPARATION:
(a) Turn the ignition switch to LOCK.
(b) Disconnect negative (±) terminal cable from the battery,
and wait at least for 90 seconds.
(c) Connect the front passenger airbag assembly connector.
(d) Connect negative (±) terminal cable to the battery, and
wait at least for 2 seconds.
CHECK:
(a) Turn the ignition switch to ON, and wait at least for 20 se-
conds.
(b) Clear the DTC stored in memory (See step 5 on page
DI±497).
(c) Turn the ignition switch to LOCK, and wait at least for 20
seconds.
(d) Turn the ignition switch to ON, and wait at least for 20 se-
conds.
(e) Check the DTC (See page DI±497).
OK:
DTC B0108/52 is not output.
HINT:
Codes other than code B0108/52 may be output at this time, but
they are not relevant to this check.
NG Replace front passenger airbag assembly.
OK
From the results of the above inspection, the malfunctioning part can now be considered normal.
To make sure of this, use the simulation method to check. If the malfunctioning part can not be
detected by the simulation method, replace all SRS components including the wire harness.

H01454
Side Squib (RH)Airbag Sensor Assembly
SFR+
SFR± Y±R
Y±G 1
22 1
A19
A19
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±545
2001 PRIUS (RM778U)
DTC B0110/43 Short in Side Squib (RH) Circuit
CIRCUIT DESCRIPTION
The side squib (RH) circuit consists of the airbag sensor assembly and side airbag assembly (RH).
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
For details of the function of each component, see OPERATION on page RS±2.
DTC B0110/43 is recorded when a short is detected in the side squib (RH) circuit.
DTC No.DTC Detecting ConditionTrouble Area
B0110/43

Short circuit between FR+ wire harness and FR± wire
harness of squib

Side squib (RH) malfunction

Airbag sensor assembly malfunction
Side airbag assembly (RH)

Airbag sensor assembly

Wire harness
WIRING DIAGRAM
DI6PB±04

H01019H09668H12946
Squib (RH)Airbag
Sensor
Assembly
FR+
(±) (+) FR±
DI±546
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
2001 PRIUS (RM778U)
INSPECTION PROCEDURE
1 Prepare for inspection (See step 1 on page DI±629).
2 Check side squib (RH) circuit.
PREPARATION:
Release the airbag activation prevention mechanism of the
connector (on the airbag sensor assembly side) between the
airbag sensor assembly and the side airbag assembly (RH)
(See page DI±497).
CHECK:
For the connector (on the side airbag assembly side) between
the side airbag assembly (RH) and the airbag sensor assembly,
measure the resistance between FR+ and FR±.
OK:
Resistance: 1 MW or Higher
NG Repair or replace harness or connector be-
tween side airbag assembly (RH) and airbag
sensor assembly.
OK

H10600 H01020
H01069 AB0119H12017
Squib (RH)Airbag
Sensor
Assembly
DTC B0110/43
" u
ON
DLC3
Tc CG
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±547
2001 PRIUS (RM778U)
3 Check airbag sensor assembly.
PREPARATION:
(a) Connect the connector to the airbag sensor assembly.
(b) Connect negative (±) terminal cable to the battery, and
wait at least for 2 seconds.
CHECK:
(a) Turn the ignition switch to ON and wait at least for 20 se-
conds.
(b) Clear the DTC stored in memory (See page DI±497).
(c) Turn the ignition switch to LOCK, and wait at least for 20
seconds.
(d) Turn the ignition switch or ON, and wait at least for 20 se-
conds.
(e) Check the DTC (See page DI±497).
OK:
DTC B0110/43 is not output.
HINT:
Codes other than code B0110/43 may be output at this time, but
they are not relevant to this check.
NG Replace airbag sensor assembly.
OK

H10600 H01020
H01069 AB0119H12018
"u
Squib (RH)Airbag
Sensor
Assembly
DLC3DTC B0110/43 ON
Tc CG
DI±548
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
2001 PRIUS (RM778U)
4 Check side squib (RH).
PREPARATION:
(a) Turn the ignition switch to LOCK.
(b) Disconnect negative (±) terminal cable from the battery,
and wait at least for 90 seconds.
(c) Connect the side airbag assembly (RH) connector.
(d) Connect negative (±) terminal cable to the battery, and
wait at least for 2 seconds.
CHECK:
(a) Turn the ignition switch to LOOK, and wait at least for 20
second.
(b) Turn the ignition switch to ON, and wait at least for 20 se-
conds.
(c) Clear the DTC stored in memory (See page DI±497).
(d) Turn the ignition switch to LOCK, and wait at least for 20
seconds.
(e) Turn the ignition switch to ON, and wait at least for 20 se-
conds.
(f) Check the DTC (See page DI±497).
OK:
DTC B0110/43 is not output.
HINT:
Codes other than code B0110/43 may be output at this time, but
they are not relevant to this check.
NG Replace side airbag assembly (RH).
OK
From the results of the above inspection, the malfunctioning part can now be considered normal.
To make sure of this, use the simulation method to check.