2001 TOYOTA AVALON engine sensor

- DIAGNOSTICSENGINE
DI-21
177 Author
: Date
:
2001 AVALON (RM808U) EVP1 (E5-7) - E01 (E4-21)
B-R eW-BIG switch ON9 - 14
CCV (E8-10) - E01 (E4-21)G eW-BIG switch ON9 - 14
RSO (E4-26) - E01 (E4-21)G-B eW-BIG switch ON, Disconnect E11 connector from ECM9 - 14
OXS (E7-8) - E1 (E5-17)B eBRMaintain engine speed at 2,500 rpm for 3 min. after warming upPulse generation
(See page DI-71)
HTS (E7 9) E03 (E4 30)LGWBIdlingBelow 3.0HTS (E7-9) - E03 (E4- 30)LG eW-BIG switch ON9 - 14
KNKR (E4-27) - E1 (E5-17)W eBRIdliPulse generation
KNKL (E4-28) - E1 (E5-17)W eBRIdlingPulse generation
(See page DI-64)
NSW (E7 20) E1 (E5 17)BWBRIG switch ON, Other shift position in P, N9 - 14NSW (E7-20) - E1 (E5-17)B-W eBRIG switch ON, Shift position in P, N0
TACH (E7-27) - E1 (E5-17)B eBRIdlingPulse generation
TBP (E7-3) - E01 (E4-21)P-B eW-BIG switch ON, Disconnect vacuum hose from vapor pressure
sensor9 - 14
PTNK (E8 17) E2 (E5 18)PWIG switch ON2.9 - 3.7PTNK (E8-17) - E2 (E5-18)P eWIG switch ON, Apply vacuum 4.0 kPa (30 mmHg, 1.18 in.Hg)0.5 or less
SIL (E8-4) - E1 (E5-17)W eBRDuring transmissionPulse generation
STP (E8 15) E1 (E5 17)GWBRIG switch ON, Brake pedal depressed7.5 - 14STP (E8-15) - E1 (E5-17)G-W eBRIG switch ON, Brake pedal releasedBelow 1.5
AFR+ (E5-11) - E1 (E5-17)B-R eBRIG it h ON30 36AFL+ (E5-12) - E1 (E5-17)B-W eBRIG switch ON3.0 - 3.6
AFR- (E5-20) - E1 (E5-17)BR eBRIG it h ON27 33AFL- (E5-21) - E1 (E5-17)L eBRIG switch ON2.7 - 3.3
HAFR (E5-3) - E04 (E5-1)B-R eW-BIdlingBelow 3.0HAFR (E5 3) E04 (E5 1)
HAFL (E5-4) - E05 (E5-8)
BR eWB
B-R eW-BIG switch ON9 - 14
KSW (E7 23) E1 (E5 17)RYBRAt time of inserting keyBelow 1.5KSW (E7-23) - E1 (E5-17)R-Y eBRIn condition without key inserted4 - 5
CODE (E7-28) - E1 (E5-17)P-G eBRAt time of inserting keyPulse generation
IGSW (E8-2) - E1 (E5-17)B-O eBRIG switch ON9 - 14
TXCT (E7-18) - E1 (E5-17)L-Y eBRAt time of inserting keyPulse generation
IMLD (E8-22) - E1 (E5-17)V-W eBRIn condition without key insertedPulse generation
MREL (E8-8) - E1 (E5-17)L-O eBRIG switch ON9 - 14

I13626
SGND
SYSB J14
J/C
25 19
3C5
FL MAIN
BatteryEngine Room J/B J/B No. 3
IHP21
P21
W-G
DCC ECU-B
FL BlockB
BR BRB 9
BC1
BR 9
IA1
BR
J13
J/C A
A3E14
W-G W-G5
BC1
Driver Side J/B
1B9
1J9
W-L
2C1
2G2
B
F71
F61
B
BRPower Seat ECU
- DIAGNOSTICSPOWER SEAT CONTROL SYSTEM (w/ Driving Position
Memory)DI-497
653 Author
: Date
:
2001 AVALON (RM808U)
ECU Power Source Circuit
CIRCUIT DESCRIPTION
This circuit provides power for ECU operation and is also the power source for the sensor.
WIRING DIAGRAM
DI0G1-09

H02750
Airbag Sensor Assembly Front Airbag Sensor (LH)
+SL
-SL C615
26 2
1 +SL
IF2
-SL21
C6 BR BRW-R W-R
IF2
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-467
623 Author
: Date
:
2001 AVALON (RM808U)
DTC B1158/B1159/16 Front Airbag Sensor (LH) Malfunction
CIRCUIT DESCRIPTION
The front airbag sensor (LH) circuit consists of the airbag sensor assembly and front airbag sensor (LH).
For details of the function of each component, see OPERATION on page RS-3.
DTC B1158/B1159/16 is recorded when malfunction is detected in the front airbag sensor (LH) circuit.
DTC No.DTC Detecting ConditionTrouble Area
B1158/B1159/16
Front airbag sensor (LH) malfunction

Front airbag sensor (LH)

Wire harness

Airbag sensor assembly

Engine room main wire harness
WIRING DIAGRAM
DI6N3-01

H03354
H06141AB0119H08272
Airbag
Sensor
Assembly Front Airbag
Sensor (LH)
(+)
SL+
(-)
SL-
ON
Engine Room Main
Wire Harness
u"
H03354H06140H08258
Airbag
Sensor
Assembly Front Airbag
Sensor (LH)
(+)SL+
(-)SL- Engine Room Main
Wire Harness
DI-472
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
628 Author
: Date
:
2001 AVALON (RM808U)
8 Check engine room main wire harness (to B+).
PREPARATION:
Disconnect the engine room main wire harness connector on
the airbag sensor assembly side.
CHECK:
(a) Turn the ignition switch to ON.
(b) For the connector (on the LH front door wire harness side)
between the airbag sensor assembly and the engine
room main wire harness, measure the voltage between
body ground and each of SL+ and SL-.
OK:
Voltage: Below 1 V
NG Repair or replace engine room main wire har-
ness.
OK
Repair or replace harness or connector between airbag sensor assembly and engine room main
wire harness.
9 Check engine room main wire harness (to ground).
PREPARATION:
Disconnect the engine room main wire harness connector on
the airbag sensor assembly side.
CHECK:
For the connector (on the engine room main wire harness side)
between the airbag sensor assembly and the engine room main
wire harness, measure the resistance between body ground
and each of SL+ and SL-.
OK:
Resistance: 1 MW or Higher
NG Repair or replace engine room main wire har-
ness.
OK
Repair or replace harness or connector between airbag sensor assembly and engine room main
wire harness.

H03354H09519H09520
Airbag
Sensor
Assembly
Front Airbag
Sensor (LH)
(-) SL+SL-
Engine Room Main
Wire Harness
(+)
u "
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-473
629 Author
: Date
:
2001 AVALON (RM808U)
10 Check engine room main wire harness.
PREPARATION:
Disconnect the engine room main wire harness connector on
the airbag sensor assembly side.
CHECK:
For the connector (on the engine room main wire harness side)
between the airbag sensor assembly and the engine room main
wire harness, measure the resistance between SL+ and SL-.
OK:
Resistance: 1 MW or Higher
NG Repair or replace engine room main wire har-
ness.
OK
Repair or replace harness or connector between airbag sensor assembly and engine room main
wire harness.

H03352H09519H09521H09522
Airbag
Sensor
Assembly Front Airbag
Sensor (LH)
(+) SL+
(-)SL-
Engine Room Main
Wire Harness
SL+
SL-
u "
DI-474
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
630 Author
: Date
:
2001 AVALON (RM808U)
11 Check engine room main wire harness.
PREPARATION:
(a) Disconnect the engine room main wire harness connector
on the airbag sensor assembly side.
(b) Using a service wire, connect SL+ and SL- of the connec-
tor (on the engine room main wire harness side) between
the engine room main wire harness and the front airbag
sensor (LH).
CHECK:
For the connector (on the engine room main wire harness side)
between the airbag sensor assembly and the engine room main
wire harness, measure the resistance between SL+ and SL-.
OK:
Resistance: Below 1 W
NG Repair or replace engine room main wire har-
ness.
OK
Repair or replace harness or connector between airbag sensor assembly and engine room main
wire harness.

H12003
Airbag Sensor
Assembly
I15
Ignition Switch
Engine Room R/B No. 5IG2 C6ACC 1F
5 6
B-O
B-LC6 W-G
ALTGR
1F
1C 1CDriver Side J/B
10 10
1 7
B-O3
6 2
7 W-L 7
BatteyFL MAINF6 IF1 W-L
IF1W-R 4
W-R
5
5 AM1
21
Engine Room J/BFL Block
72
112G
2G 2C
2HAM2
B
F7
F81
1
B1 SRS-ACC
BAM1ACC
AM2 IG2 DI-476
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
632 Author
: Date
:
2001 AVALON (RM808U)
WIRING DIAGRAM

H12004
Battery10Airbag Sensor Assembly
LA
C63
B-Y 5 12
1F 1A1I
II2
B-Y 5 B-Y
5 AB DLC1
B-Y
56 M7
SRS Warning Light
LG-B
IJ1 4
LG-B
2G 2B
SRS WRN
Engine Room J/BB
FL Block F7
F6 1
1
B FL MAINDriver Side J/B
12
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-479
635 Author
: Date
:
2001 AVALON (RM808U)
SRS Warning Light Circuit Malfunction
CIRCUIT DESCRIPTION
The SRS warning light is located on the combination meter.
When the SRS is normal, the SRS warning light lights up for approx. 6 seconds after the ignition switch is
turned from the LOCK position to ACC or ON position, and then turns off automatically.
If there is a malfunction in the SRS, the SRS warning light lights up to inform the driver of the abnormality.
When terminals Tc and E1 of the DLC1 are connected, the DTC is displayed by blinking the SRS warning
light.
WIRING DIAGRAM
DI5RJ-04