TOYOTA AVENSIS 2005 Service Repair Manual

05±1182
±
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
10SYMPTOM SIMULATION (See page 01±22)
WARNING LIGHT REMAINS OFF: Go to step 11
WARNING LIGHT IS ON: Go to step 4
11 CONFIRMATION TEST
END


I35971
A11
AlternatorPower Heater ECU
L EE1
P1ALT+L A114
38
YY
± DIAGNOSTICSCOMBUSTION TYPE POWER HEATER SYSTEM
05±1179
AVENSIS REPAIR MANUAL (RM1018E)
POWER HEATER ALTERNATOR CIRCUIT
CIRCUIT DESCRIPTION
Turning on the alternator allows current to flow from the alternator to the power heater. As a result, the power
heater ECU control the expanded power of the combustion type power heater.
WIRING DIAGRAM
05C83±01

I37735
ALT+LL
1 23 45 67 8
1234
P1
A11
05±1180
±
DIAGNOSTICS COMBUSTION TYPE POWER HEATER SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
1CHECK WIRE HARNESS(POWER HEATER ECU ± ALTERNATOR)
(a)Check for an open or short circuit in harness and connec- tor between terminal ALT+L of power heater ECU and ter-
minal L of alternator (See page 01±32).
NG REPAIR OR REPLACE WIRE HARNESS
OK
2 CHECK AND REPLACE GENERATOR W/CLUTCH PULLEY
NG REPAIR OR REPLACE GENERATOR W/CLUTCH PULLEY
OK
REPAIR OR REPLACE POWER HEATER ECU

I35412
F17
Fuel Pump
M
21L
W±B
ECP12
F/P Power Heater ECU 05±1176
± DIAGNOSTICSCOMBUSTION TYPE POWER HEATER SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
POWER HEATER FUEL PUMP CIRCUIT
CIRCUIT DESCRIPTION
When the power heater switch is turned on, the fuel pump receives the drive voltage from the power heater
ECU, causing the combustion type power heater to operate.
WIRING DIAGRAM
05C82±01

I37732
1 23 4
5 67 8
F/P
P1
I37734
12 F17
I37734
12F17
±
DIAGNOSTICS COMBUSTION TYPE POWER HEATER SYSTEM
05±1177
AVENSIS REPAIR MANUAL (RM1018E)
1CHECK WIRE HARNESS(POWER HEATER ECU ± BODY GROUND)
(a)Check for short circuit in harness and connector between
terminal F/P of power heater ECU and body ground
(See page 01±32).
NG REPAIR OR REPLACE WIRE HARNESS
OK
2 CHECK WIRE HARNESS(POWER HEATER ECU ± POWER HEATER FUEL PUMP)
(a) Check for an open or short circuit in harness and connec- tor betwen terminal 1 of power heater ECU and power
heater fuel pump (See page 01±32).
NG REPAIR OR REPLACE WIRE HARNESS
OK
3 CHECK WIRE HARNESS(POWER HEATER FUEL PUMP ± BODY GROUND)
(a) Check for an open circuit in harness and connector be- tween terminal 2 of power heater fuel pump and body
ground
(See page 01±32).
NG REPAIR OR REPLACE WIRE HARNESS
OK

I36139
F17
05±1178
± DIAGNOSTICSCOMBUSTION TYPE POWER HEATER SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
4 INSPECT POWER HEATER FUEL PUMP
(a) Connect the positive (+) lead from the battery to terminal
1 and negative (±) to terminal 2 with the power heater
turned on and check the pressure of the hose by hand.
Standard: The pressure is applied to the hose.
NG REPAIR OR REPLACE POWER HEATER FUEL
PUMP
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

I36132
Center J/BP5
Power Heater SWPower Heater ECU
CB1
CK12
R±W G±Y G±Y
IE612
P13
SW
W±B
R±W36IG IN
2 E
Driver Side J/B
B±L
DN
DH5 1 IG1 Relay HTR
DC
DA9 6
DH1W±B
AM1
I13
Ignition SW
1 IG1 AM1 3G±R
Engine Room R/B No.3
ALT
ED11
B±L W
33
21
B
FL MAIN
Battery
IJ IKA
J15
J/C 53
12
G±Y
± DIAGNOSTICSCOMBUSTION TYPE POWER HEATER SYSTEM
05±1173
AVENSIS REPAIR MANUAL (RM1018E)
POWER HEATER SWITCH CIRCUIT
CIRCUIT DESCRIPTION
When the power heter switch is turned on, the power heater ECU sends the drive signal to the fuel pump,
causing the combustion type power heater to operate.
WIRING DIAGRAM
05C81±01

I32396
E
IG INILL+
ILL±
P5
I37733
SWIN
1 2 3 4
5 6 7 8
P1
P5
05±1174
± DIAGNOSTICSCOMBUSTION TYPE POWER HEATER SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
1 INSPECT HETER SWITCH ASSY
(a) Check that the continuity when connecting the positive
tester lead (+) and the negative tester lead (±) to the fol-
lowing terminals.
Heater switch conditionConnectiong terminalsStandard Value
ONIG ± INContinuity
OFFIG ± INNo Continuity
ONIG ± EContinuity
OFFIG ± ENo Continuity
ONILL+ ± ILL±Continuity
OFFILL+ ± ILL±Continuity
NG REPLACE HETER SWITCH ASSY
OK
2 CHECK WIRE HARNESS(HETER SWITCH ASSY ± POWER HEATER ECU)
(a) Remove the A/C amplifier with connectors being con-
nected.
(b) Turn the ignition switch to ON.
(c) Measure the voltage between terminal IN of the heater
switch and SW of the power heater ECU.
Heater switch conditionStandard value
ON10 to 14 V
OFF0 V
NG REPAIR OR REPLACE WIRE HARNESS
OK

I32395
IGP5
I32395
E
P5
±
DIAGNOSTICS COMBUSTION TYPE POWER HEATER SYSTEM
05±1175
AVENSIS REPAIR MANUAL (RM1018E)
3CHECK WIRE HARNESS(HETER SWITCH ASSY ± BATTERY)
(a)Check for an open and short circuit in harness and con-
nector between heater switch and battery
(See page 01±32).
NG REPAIR OR REPLACE WIRE HARNESS
OK
4 CHECK WIRE HARNESS(HETER SWITCH ASSY ± BODY GROUND)
(a) Check for an open circuit in henees and connector be- tween heater swith and body ground
(See page 01±32).
NG REPAIR OR REPLACE WIRE HARNESS
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

H01454
S18
Side Squib LHAirbag Sensor Assy Center
SFL+
SFL± Y±R
Y±G 1
211 12
A26
A26 05±1238
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
DTC B0115/47 SHORT IN SIDE SQUIB (LH) CIRCUIT
CIRCUIT DESCRIPTION
The side squib LH circuit consists of the airbag sensor assy center and the separate type front seat back
assy (side squib LH).
This circuit actuates the SRS to deploy when the SRS deployment conditions are fulfilled.
DTC B0115/47 is recorded when a short circuit is detected in the side squib LH circuit.
DTC No.DTC Detecting ConditionTrouble Area
B0115/47

Short circuit between SFL+ wire harness and SFL± wire har-
ness of side squib LH

Side squib LH malfunction

Airbag sensor assy center malfunction
Separate type front seat back assy (Side squib LH)

Airbag sensor assy center

Floor wire
WIRING DIAGRAM
056M3±03