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DI-465
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
DI192-33
Tc Terminal Circuit
CIRCUIT DESCRIPTION
By connecting terminals Tc and E1 of the DLC1 the airbag sensor assembly is set in the DTC output mode.
The DTCs are displayed by blinking the SRS warning light.
WIRING DIAGRAM
D1
DLC1 Airbag Sensor Assembly
J6
J/C
23 19
11 GR G-R B B GR
Tc II4 C21 Tc
3 BR
E1
EC
H07399
INSPECTION PROCEDURE
If the DTC is not displayed, do the following troubleshooting.
1 Does SRS warning light light up for approx. 6 seconds?
PREPARATION:
LOCK Check operation of the SRS warning light after ignition switch
ACC ON
is turned from LOCK position to ACC or ON position.
or
NO Check SRS warning light system.
AB0117 AB0118 AB0119
H07393
(See page DI-377 )
W01632
YES
2002 4RUNNER (RM887U)
Author : Date : 641
DI-466
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
2 Check voltage between terminals Tc and E1 of DLC1.
ACC ON PREPARATION:
Turn ignition switch to ACC or ON.
or CHECK:
E1 Measure the voltage between terminals Tc and E1 of DLC1.
Tc
OK:
Voltage: 10 - 14 V
(-) (+)
AB0118 AB0119
R14305 H00030
OK Go to step 4.
NG
3 Check voltage between terminal Tc of DLC1 and body ground.
ACC ON CHECK:
Measure the voltage between terminal Tc of DLC1 and body
Tc
or ground.
OK:
Voltage: 10 - 14 V
(-) (+)
AB0118 AB0119
R14304 H00031
OK Check harness between terminal E1 of DLC1
and body ground.
NG
2002 4RUNNER (RM887U)
Author : Date : 642
DI-467
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
4 Check airbag sensor assembly.
PREPARATION:
LOCK ACC ON (a) Turn ignition switch to LOCK.
(b) Disconnect negative (-) terminal cable from the battery,
or and wait at least for 90 seconds.
Airbag Sensor Assembly (c) Disconnect the airbag sensor assembly connector.
(d) Insert service wire into terminal Tc from back side as
shown in the illustration.
(e) Connect the airbag sensor assembly connector with ser-
vice wire.
(f) Connect negative (-) terminal cable to the battery.
(g) Turn ignition switch to ACC or ON and wait at least for 20
seconds.
Tc
(h) Connect service wire of terminal Tc to body ground.
AB0117 AB0118 AB0119
H01302 H01303 CHECK:
Check operation of SRS warning light.
OK:
SRS waning light comes on.
NOTICE:
Pay due attention to the terminal connecting position to
avoid a malfunction.
OK Check harness between the airbag sensor as-
sembly and DLC1.
NG
Replace airbag sensor assembly.
2002 4RUNNER (RM887U)
Author : Date : 643
DI-468
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
If the DTC is displayed without a DTC check procedure, perform the following
troubleshooting.
1 Check resistance between terminal Tc of airbag sensor assembly and body
ground.
LOCK Airbag Sensor Assembly PREPARATION:
(a) Turn ignition switch to LOCK.
(b) Disconnect negative (-) terminal cable from the battery,
and wait at least for 90 seconds.
Tc (c) Disconnect the airbag sensor assembly connector.
CHECK:
(-) (+) Check the resistance between terminal Tc of the airbag sensor
assembly connector and body ground.
AB0119
H01304 H01305 OK:
Resistance: 1 M or Higher
NG Repair or replace harness or connector.
OK
Replace airbag sensor assembly.
2002 4RUNNER (RM887U)
Author : Date : 644
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