Page 2465 of 4592
H08301H10309
LG±R P±B
B
BJ2 Junction
ConnectorAirbag Sensor
Assembly
C519
Tc
11
LG±R 11
Tc
E1DLC1
3 BR
A
BR
ECEC BR A
Junction
Connector
6
J6B
J7 C
BR 3
E1Tc DLC2 LG±R
4
B IG3
IG3
BR
J20
Junction Connector
A A BR J20
Junction Connector
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±313
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
DI1BQ±12
Page 2466 of 4592
AB0117AB0118AB0119H10313H10315
LOCK ACC
ON
or
AB0118
R14305AB0119
H00030
ACCON
or
E1
Tc
(+) (±)
DI±314
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
INSPECTION PROCEDURE
If the DTC is not displayed, do the following troubleshooting.
1 Does SRS warning light up for approx. 6 seconds?
PREPARATION:
Check operation of the SRS warning light after ignition switch
is turned from LOCK position to ACC or ON position.
NO Check SRS warning light system.
(See page DI±223)
YES
2 Check voltage between terminals Tc and E1 of DLC1.
PREPARATION:
Turn ignition switch to ACC or ON.
CHECK:
Measure the voltage between terminals Tc and E1 of DLC1.
OK:
Voltage: 10 ± 14 V
OK Go to step 4.
NG
Page 2467 of 4592

AB0118
R14304AB0119
H00031
ACCON
orTc
(+)
(±)
AB0117 AB0118 AB0119H01302H01303
LOCK
ACCON
or
Airbag Sensor Assembly
Tc
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±315
3 Check voltage between terminal Tc of DLC1 and body ground.
CHECK:
Measure the voltage between terminal Tc of DLC1 and body
ground.
OK:
Voltage: 10 ± 14 V
OK Check harness between terminal E1 of DLC1
and body ground.
NG
4 Check 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.
(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.
(h) Connect service wire of terminal Tc to body ground.
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.
Page 2468 of 4592
AB0119H01304H01305
LOCKAirbag Sensor Assembly
Tc
(+)
(±)
DI±316
± DIAGNOSTICSSUPPLEMENTAL 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.
PREPARATION:
(a) Turn ignition switch to LOCK.
(b) Disconnect negative (±) terminal cable from the battery,
and wait at least for 90 seconds.
(c) Disconnect the airbag sensor assembly connector.
CHECK:
Check resistance between terminal Tc of the airbag sensor as-
sembly connector and body ground.
OK:
Resistance: 1 MW or Higher
NG Repair or replace harness or connector.
OK
Replace airbag sensor assembly.
Page 2469 of 4592
DI08F±12
Customer Problem Analysis
Check and Clear DTC (Precheck)
Vehicle Brought to Workshop
Problem Symptom ConfirmationSymptom Simulation Symptom does not occur
DTC CheckNormal code
DTC Chart
Problem Symptoms Table
Circuit InspectionInput Signal Check
Parts Inspection
Identification of Problem
Repair
Confirmation Test
EndItems inside
are titles of pages in this
manual with the page number indicated in the
bottom portion. See the indicated pages
for detailed explanations. 1
2
34
5
6
7
89
10
Step 2, 5: Diagnostic steps permitting the use
of the TOYOTA hand±held tester or
TOYOTA break±out±box. P. DI±318
P. DI±319
P. DI±319
P. DI±324
P. IN±19
P. DI±328
P. DI±329
OKNG
Symptom occurs
Malfunction code
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±317
387 Author: Date:
CRUISE CONTROL SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING
Troubleshoot in accordance with the procedure on the following page.
Page 2470 of 4592

DI08G±09
CRUISE CONTROL SYSTEM Check Sheet
Inspector 's name:
Customer 's Name
Date VehicleRegistration No.
Registration Year
Frame No.
Odometer Reading / /km
Mile
Condition of
Problem Occurrence
Date of Problem
How Often does
Occurrence
Problem Occurs
Vehicle Speed when
Problem Occurred / /
Continuous Intermittent ( Times a day)
km
Mile Brought in
Auto cancel
occurs Driving condition
City driving Freeway Up hill Down hill
After cancel occurred, did the driver activate cruise control
again?
Yes No
Cancel does not
occur With brake ON
Except D position shift At 40 km/h (25 mph) or less
When control SW turns to CANCEL position
Cruise control
malfunction Slip to acceleration side
Slip to deceleration side
Hunting occurs
O/D cut off does not occur
O/D does not return
Switch
malfunction SET ACCEL COAST RESUME CANCEL
Remains ON Does not light up Blinking Symptoms
DTC Check1st Time2nd Time
Normal Code Malfunction Code (Code )
Normal Code Malfunction Code (Code ) DI±318
± DIAGNOSTICSCRUISE CONTROL SYSTEM
CUSTOMER PROBLEM ANALYSIS CHECK
Page 2471 of 4592

I00279CRUISE MAIN Indicator Light
DI1KS±04
BE4034
Indicator light
1.5 sec.0.5 sec.
ON
OFF
I00169
DLC2
Tc E 1
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±319
PRE±CHECK
1. DIAGNOSIS SYSTEM
(a) Check the indicator.
(1) Turn the ignition switch ON.
(2) Check that the CRUISE MAIN indicator light comes
ON when the cruise control main switch is turned
ON, and that the indicator light goes OFF when the
main switch is turned OFF.
HINT:
If the indicator check result is not normal, proceed to trouble-
shooting (See page BE±1) for the combination meter section.
(b) Check the DTC.
HINT:
If a malfunction occurs in the No. 1 vehicle speed sensor or ac-
tuator, etc. during cruise control driving, the ECU actuates
AUTO CANCEL of the cruise control and turns on and off the
CRUISE MAIN indicator light to inform the driver of a malfunc-
tion. At the same time, the malfunction is stored in memory as
a DTC.
(c) Output of DTC using diagnosis check wire.
(1) Turn the ignition switch ON.
(2) Using SST, connect terminals Tc and E
1 of DLC2.
SST 09843±18020
(3) Read the DTC on the CRUISE MAIN indicator light.
Page 2472 of 4592

BE4032
BE4033I00021
Normal code
0.25 sec.
0.25 sec.
ON
OFF
ON
OFF
4 sec.1.5 sec. 0.5 sec.
2.5 sec.0.5 sec.1.5 sec.
Malfunction codes 11 and 21
Code 11 Code 21
H07517DLC2
I08438
DLC1
TC
E1(b) (d) 5 times
within 3 seconds
(c)
DI±320
± DIAGNOSTICSCRUISE CONTROL SYSTEM
HINT:
If the DTC is not output, inspect the diagnosis circuit (See page
DI±362).
As an example, the blinking patterns for codes; normal, 11 and
21 are shown in the illustration.
2. USING TOYOTA HAND±HELD TESTER
(a) Hook up the TOYOTA hand±held tester to the DLC2.
(b) Monitor the ECU data by following the prompts on the tes-
ter screen.
HINT:
TOYOTA hand±held tester has a ºSnapshotº function which re-
cords the monitored data.
Please refer to the TOYOTA hand±held tester operator's manu-
al for further details.
3. DTC CLEARANCE (ERASE MODE)
HINT:
During in the erase mode, diag detection does not work.
(a) Stop the vehicle.
(b) Using SST, connect terminals Tc and E
1 of DLC1.
SST 09843±18020
(c) Pull the cruise control switch to CANCEL.
(d) On the above metioned condition, turn on the cruise con-
trol main switch 5 times within 3 seconds.