2001 TOYOTA PRIUS Service Repair Manual

H01016H08392H08396
P/T Squib (LH)
Airbag
Sensor
Assembly
PL+
(+) (±)
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±591
2001 PRIUS (RM778U)
DTC B0137/71 Short in P/T Squib (LH) Circuit
(to Ground)
CIRCUIT DESCRIPTION
The P/T squib (LH) circuit consists of the airbag sensor assembly and seat belt pretensioner (LH).
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 B0137/71 is recorded when a ground short is detected in the P/T squib (LH) circuit.
DTC No.DTC Detecting ConditionTrouble Area
B0137/71

Short circuit in P/T squib (LH) wire harness (to ground)

P/T squib (LH) malfunction

Airbag sensor assembly malfunction
Seat belt pretensioner (LH)

Airbag sensor assembly

Wire harness
WIRING DIAGRAM
See page DI±579.
INSPECTION PROCEDURE
1 Prepare for inspection (See step 1 on page DI±629).
2 Check P/T squib (LH) circuit.
CHECK:
For the connector (on the seat belt pretensioner side) between
the seat belt pretensioner (LH) and the airbag sensor assembly,
measure the resistance between PL+ and body ground.
OK:
Resistance: 1 MW or Higher
NG Repair or replace harness or connector be-
tween seat belt pretensioner (LH) and airbag
sensor assembly.
OK
DI6PP±04

H01017H02139AB0119H01084 H10600H10631
P/T Squib (LH)Airbag
Sensor
Assembly
PL+
PL±
DTC B0137/71ON " u
DLC3
Tc CG
DI±592
± 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 PL+ and PL± of the connec-
tor (on the seat belt pretensioner side) between the seat
belt pretensioner (LH) and the airbag sensor 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 B0137/71 is not output.
HINT:
Codes other than code B0137/71 may be output at this time, but
they are not relevant to this check.
NG Replace airbag sensor assembly.
OK

H01018
AB0118AB0119H01084 H10600H10632
"u
ONAirbag
Sensor
Assembly P/T Squib (LH)
DTC B0137/71 DLC3
Tc CG
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±593
2001 PRIUS (RM778U)
4 Check P/T squib (LH).
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 seat belt pretensioner (LH) 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 B0137/71 is not output.
HINT:
Codes other than code B0137/71 may be output at this time, but
they are not relevant to this check.
NG Replace seat belt pretensioner (LH).
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.

H01016AB0119
H08394H08269
Airbag
Sensor
Assembly P/T Squib (LH)
PL+
(±) (+) ON
DI±594
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
2001 PRIUS (RM778U)
DTC B0138/72 Short in P/T Squib (LH) Circuit (to B+)
CIRCUIT DESCRIPTION
The P/T squib (LH) circuit consists of the airbag sensor assembly and seat belt pretensioner (LH).
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 B0138/72 is recorded when a B+ short is detected in the P/T squib (LH) circuit.
DTC No.DTC Detecting ConditionTrouble Area
B0138/72

Short circuit in seat belt pretensioner (LH) wire harness
(to B+)

P/T squib (LH) malfunction

Airbag sensor assembly malfunction
Seat belt pretensioner (LH)

Airbag sensor assembly

Wire harness
WIRING DIAGRAM
See page DI±579.
INSPECTION PROCEDURE
1 Prepare for inspection (See step 1 on page DI±629).
2 Check P/T squib (LH) circuit.
CHECK:
(a) Turn the ignition switch to ON.
(b) For the connector (on the seat belt pretensioner side) be-
tween the seat belt pretensioner (LH) and the airbag sen-
sor assembly, measure the voltage between PL+ and
body ground.
OK:
Voltage: 0 V
NG Repair or replace harness or connector be-
tween seat belt pretensioner (LH) and airbag
sensor assembly.
OK
DI6PQ±04