Page 1193 of 5135
05C7V±01
I12508
Connector B
DTC Check Harness
Current DisplayControl PanelPast Record DTC Display
Memory Clear Button
DTC Calling Button
DTC Calling ButtonºHeatingº
Symbol In Normal
In Malfunction Connector A
05±1164
± DIAGNOSTICSCOMBUSTION TYPE POWER HEATER SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
PRE±CHECK
NOTICE:
If the glow plug breaks, the ECU detects the breakage and stops the automatic operation, so
the burner heater does not activate. (For other failures, similarly activated.)
The cause of failures (such as voltage malfunction, overheating malfunction, short±circuit or
breakage of functional components, etc.) and repair methods are shown by connecting the DTC
tester and reading the DTC.
1. DIAGNOSTICS FUNCTION
(a) Connect the DTC tester between the connector A (Vehicle harness) of DTC check harness and con-
nector B (Power heater harness).
(b) Start the engine.
(c) Pressing the DTC calling button displays a 3±digit number DTC.
Page 1194 of 5135
I35431
Buner Motor
Glow Plug
Surface Sensor
Temp.Control Sensor
Flame Sensor13
Power
Heater
ECU
Connector BTerminal L
of AlternatorBattery
Metering Pump
Fuse (20 A)
Vehicle Side SW 14
9
12
5
6
3
4
1
2BR
G
L±Y
L B±R
Y
L±WR
1
2
3
4 5
6
7
8W±B Connector A
IG
R±G
R±L (*1)
R±Y (*2)
R±B
W±R (*1)
Y±R (*2)
*1: TMC Made
*2: TMUK Made
± DIAGNOSTICSCOMBUSTION TYPE POWER HEATER SYSTEM
05±1165
AVENSIS REPAIR MANUAL (RM1018E)
2. DESCRIPTION OF DISPLAY AND BUTTONS
(a) AF: Current Value Malfunction (Blinking at current failure)
Diag: DTC (Example: 064 Flame sensor break)
Memory Clear button: Deletion of faulty memory (Press both buttons together for longer than 2 sec.)
> Button: Scroll up of faulty memory (The past 5 codes can be stored.)
< Button: Scroll down of faulty memory (The past 5 codes can be stored.)
3. FAULTY MEMORY
(a) The ECU is able to store upto 5 pieces of faulty memory. If it is full, the new data is written over F5.
4. WIRING DIAGRAM
Page 1195 of 5135
05C7U±01
I35990
Inspector 's name:
Customer 's NameVIN
Production Date
Licence No.
Odometer Readingkm
Miles Date vehicle
Brought In / /
Date of Problem Occurrence
How Often does Problem Occur?
Weather
Outdoor Temperature / /
Continuous Intermittent ( times a day)
Fine Cloudy Snowy Various / Other
Hot Warm Cool Cold (Approx.F
C)
DTC Check1st Time
2nd Time Normal Code Malfunction Code (Code )
Normal Code Malfunction Code (Code )
AIR CONDITIONING SYSTEM Check Sheet
± DIAGNOSTICSCOMBUSTION TYPE POWER HEATER SYSTEM
05±1163
AVENSIS REPAIR MANUAL (RM1018E)
CUSTOMER PROBLEM ANALYSIS CHECK
Page 1196 of 5135
05C7T±01
±
DIAGNOSTIC SCOMBUSTION TYPE POWER HE ATER SYSTEM
05± 1161
A VENSIS RE PAIR MANUAL (RM1018E)
COMBUSTIO N TYPE POWER HE ATER SYSTEM
HOW T O PROCEED WITH TROUBLESHOOTING
1 VEHICL E BROUGHT TO WORK SHOP
2 CUSTOMER PROBLEM ANA LYSIS ( See page 05± 1163 )
3 CHECK AND CLEAR DTC ( See page 05±1164 )
4 PROBLEM SYMPTOM CONFIRMATION
SYMPTOM OCCUR (GO TO STEP 6)
SYMPTOM DOES NOT OCCUR (GO TO
STEP 5)
5 SYMP TOM SIMUL ATION ( See page 01±22 )
6 DTC CHECK ( See page 05±1164 )
7 DTC CHART ( See page 05±1166 )
8 PROBLEM SYMP TOMS TABLE ( See page 05± 1170 )
9 CIRCUIT INSPECTION ( See page 05±1171 to 05± 1179 )
10 IDENTIFICATION OF PROBLEM
Page 1197 of 5135
05±1162
± DIAGNOSTICSCOMBUSTION TYPE POWER HEATER SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
11 PARTS INSPECTION
12 REPAIR
13 CONFIRMATION TEST
14 END
Page 1198 of 5135
I35396
R±W (*2) R±W (*2, *1) G±Y (*1)
W±B (*1)
W±B
(*1) R±W (*3, *1)
R±W (*3)
R±W (*2)CB1
CK 12 Center J/BP5
Power Heater SWA/C Control Assembly
A1611
J/C
J26H
J27F3IG
IN 6
E2
A
A J16
J/C
Driver Side J/B
DC6
From
HTR Fuse
ILHOTGASIN
*1: 1CD±FTV
*2: LHD
*3: RHD
± DIAGNOSTICSAIR CONDITIONING SYSTEM
05±1159
AVENSIS REPAIR MANUAL (RM1018E)
HOT GAS HEATER SWITCH CIRCUIT
CIRCUIT DESCRIPTION
Hot gas heater performs only when its switch turns to ON and fulfill the following 6 conditions.
Hot gas heater switch is ON.
Recirculation damper position is FRS.
Blower motor switch is in the position other than OFF.
Ambient temperature varies according to the following condition;
A/C switch ONBelow ±1.5C (32F)
A/C switch OFFBelow 8C (46F)
Air mix damper position is MAX HOT.
Water temperature is 70C (158F) or less.
WIRING DIAGRAM
05C7S±01
Page 1199 of 5135
I32396IG
IN
E
ILL+
ILL±
I36144
HOTGASIN
A16A15
I32395
E
05±1160
±
DIAGNOSTICS AIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
1INSPECT HETER SWITCH ASSY
(a)Check that the continuity when connecting the positive tester lead (+) and the negative tester lead (±) to the fol-
lowing terminals.
Standard:
Heater switch conditionConnecting terminalsStandard value
ONIG ± INContinuity
OFFIG ± INNo continuity
ONIG ± EContinuity
OFFIG ± ENo continuity
ONILL+ ± ILL±Continuity
OFFILL+ ± ILL±Continuity
NGREPAIR OR REPLACE HETER SWITCH ASSY
OK
2CHECK WIRE HARNESS(A/C CONTROL ASSEMBLY ± BATTERY)
(a)Remove the A/C amplifier with connectors being con- nected.
(b)Turn the ignition switch to ON.
(c)Measure the voltage between terminal HOTGASIN and GND of the A/C amplifier.
Standard:
Heater switch conditionStandard value
ON10 to 14 V
OFF0 V
NGREPAIR OR REPLACE WIRE HARNESS
OK
3CHECK WIRE HARNESS(HETER SWITCH ± BODY GROUND)
(a)Check for an open or short circuit in harness and connec- tor between heater switch and body ground
(See page 01±32).
NG REPAIR OR REPLACE WIRE HARNESS
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
Page 1200 of 5135
I35380
R±W
(*2)J26 J26HH
IE111
IE218
A157
MGV A/C Control Assembly
R±W
(*2)R±W R±B R±Y J/CC4
Condenser
Assembly
12
Driver Side J/B
DC6
DB5
R±W
(*1)
From
HTR Fuse
*1: LHD
*2: RHD
± DIAGNOSTICSAIR CONDITIONING SYSTEM
05±1157
AVENSIS REPAIR MANUAL (RM1018E)
HOT GAS HEATER MAGNETIC VALVE CIRCUIT
CIRCUIT DESCRIPTION
For the hot gas heater, it is necessary to fulfill the following 6 conditions.
Hot gas heater switch is ON.
Recirculation damper position is FRS.
Blower motor switch is in the position other than OFF.
Ambient temperature varies according to the following condition;
A/C switch ONBelow ±1.5C (32F)
A/C switch OFFBelow 8C (46F)
Air mix damper position is MAX HOT.
Water temperature is 70C (158F) or less.
WIRING DIAGRAM
05C7R±01