2001 TOYOTA PRIUS Service Repair Manual

H01000H02142H02195
D SquibSpiral
Cable
Airbag
Sensor
Assembly
D+ u"
(±) (+) D±
R14286H01004H01138
D SquibSpiral
Cable
Airbag
Sensor
Assembly
D+
(±)(+)D±
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±519
2001 PRIUS (RM778U)
5 Check spiral cable.
PREPARATION:
(a) Disconnect the connector between the airbag sensor as-
sembly and the spiral cable.
(b) Release the airbag activation prevention mechanism of
the spiral cable connector on the airbag sensor assembly
side (See page DI±497).
CHECK:
For the connector (on the spiral cable side) between the spiral
cable and the steering wheel pad, measure the resistance be-
tween D+ and D±.
OK:
Resistance: 1 MW or Higher
NG Repair or replace spiral cable.
OK
6 Check harness between airbag sensor assembly and spiral cable.
PREPARATION:
Release the airbag activation prevention mechanism of the
connector (on the airbag sensor assembly side) between the
airbag sensor assembly and the spiral cable (See page
DI±497).
CHECK:
For the connector (on the spiral cable side) between the airbag
sensor assembly and the spiral cable, measure the resistance
between D+ and D±.
OK:
Resistance: 1 MW or Higher
NG Repair or replace harness or connector be-
tween airbag sensor assembly and spiral cable.
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.

H01001H02142H02196
D SquibSpiral
Cable
Airbag
Sensor
Assembly
D+
(±) (+) D±
u"
DI±520
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
2001 PRIUS (RM778U)
DTC B0101/14 Open in D Squib Circuit
CIRCUIT DESCRIPTION
The D squib circuit consists of the airbag sensor assembly, spiral cable and steering wheel pad.
It causes the airbag to deploy when the airbag deployment conditions are satisfied.
For details of the function of each component, see OPERATION on page RS±2.
DTC B0101/14 is recorded when an open is detected in the D squib circuit.
DTC No.DTC Detecting ConditionTrouble Area
B0101/14

Open circuit in D+ wire harness or D± wire harness of
squib

D squib malfunction

Spiral cable malfunction

Airbag sensor assembly malfunction
Steering wheel pad (D squib)

Spiral cable

Airbag sensor assembly

Wire harness
WIRING DIAGRAM
See page DI±510.
INSPECTION PROCEDURE
1 Prepare for inspection (See step 1 on page DI±629).
2 Check D squib circuit.
CHECK:
For the connector (on the spiral cable side) between the spiral
cable and the steering wheel pad, measure the resistance be-
tween D+ and D±.
OK:
Resistance: Below 1 W
NG Go to step 5.
OK
DI6P4±04

H01002H02144AB0119W02044 H10600H10602
D SquibSpiral
CableAirbag
Sensor
Assembly
ON
DTC B0101/14
DLC3"u
D+D±
Tc CG
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±521
2001 PRIUS (RM778U)
3 Check airbag sensor assembly.
PREPARATION:
(a) Connect the connector to the airbag sensor assembly.
(b) Using a service wire, connect D+ and D± of the connector
(on the spiral cable side) between the spiral cable and the
steering wheel pad.
(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 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 B0101/14 is not output.
HINT:
Codes other than code B0101/14 may be output at this time, but
they are not relevant to this check.
NG Replace airbag sensor assembly.
OK

W02044
H01003AB0119
H10600H10603
"u D Squib
Spiral
Cable
ON
DTC B0101/14
DLC3
Tc CG
Airbag
Sensor
Assembly
DI±522
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
2001 PRIUS (RM778U)
4 Check D 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 steering wheel pad 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 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 B0101/14 is not output.
HINT:
Codes other than code B0101/14 may be output at this time, but
they are not relevant to this check.
NG Replace steering wheel pad.
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.