2005 TOYOTA AVENSIS diagnostic

A54396
VG Wire Harness Side
Mass Air Flow Meter ConnectorE2G A6
A65745
VGEVG
E12
ECM Connector
± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
05±27
AVENSIS REPAIR MANUAL (RM1018E)
4 CHECK HARNESS AND CONNECTOR(ECM ± MASS AIR FLOW METER)
(a) Disconnect the mass air flow meter connector.
(b) Disconnect the E12 ECM connector.
(c) Check for continuity between the wire harness side con-
nectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
VG (A6±3) ± VG (E12±24)ContinuityE2G (A6±2) ± EVG (E12±32)Continuity
Standard (Check for short):
Symbols (Terminal No.)Specified condition
VG (A6±3) or VG (E12±24) ± Body groundNo continuity
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE MASS AIR FLOW METER

A66053
Engine Room R/B No.4EFI Relay



A79066
Engine Room R/B No.4EFI No.1 Fuse
1
2
A54396Mass Air Flow Meter Connector
Wire Harness Side
+B
A6
A18294
EVG
ECM Connector E12
05±28
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
5CHECK HARNESS AND CONNECTOR(EFI RELAY ± MASS AIR FLOW METER)
(a)Remove the EFI relay from the engine room R/B No.4.
(b)Remove the EFI No.1 fuse from the engine room R/B No.4.
(c)Disconnect the mass air flow meter connector.
(d)Check for continuity between the wire harness side con- nectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
EFI relay (3) ± EFI No.1 fuse (1)ContinuityEFI No.1 fuse (2) ± +B (A6±1)Continuity
Standard (Check for short):
Symbols (Terminal No.)Specified condition
EFI relay (3) or EFI No.1 fuse (1) ± Body groundNocontinuityEFI No.1 fuse (2) or +B (A6±1) ± Body groundNo continuity
NOTICE:
Do not insert the tester leads hard in the procedure (c), the
holder may be damaged.
NGREPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CHECK ECM POWER SOURCE CIRCUIT (See page 05±124)
6INSPECT ECM
(a)Check for continuity between the terminal of the E12 ECM connector and the body ground.
Standard:
Symbols (Terminal No.)Specified condition
EVG (E12±32) ± Body groundContinuity
NGCHECK AND REPLACE ECM (See page 01±32)
OK

A54396
VG
Wire Harness Side
Mass Air Flow Meter ConnectorE2G
A6
A65745
VG
EVG
E12
ECM Connector
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
05±29
AVENSIS REPAIR MANUAL (RM1018E)
7CHECK HARNESS AND CONNECTOR(ECM ± MASS AIR FLOW METER)
(a)Disconnect the mass air flow meter connector.
(b)Disconnect the E12 ECM connector.
(c)Check for continuity between the wire harness side con-
nectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
VG (A6±3) ± VG (E12±24)ContinuityE2G (A6±2) ± EVG (E12±32)Continuity
Standard (Check for short):
Symbols (Terminal No.)Specified condition
VG (A6±3)or VG (E12±24) ± Body groundNo continuity
NGREPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CHECK AND REPLACE ECM (See page 01±32)

0505L±04
05±22
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
PROBLEM SYMPTOMS TABLE
When the malfunction code is not confirmed in the diagnostic trouble code check and the problem still can\
not be confirmed in the basic inspection, proceed to this problem symptoms \
tables and troubleshoot accord-
ing to the numbered order given below.
SymptomSuspect AreaSee page
Engine does not crank (Does not start)1. Starter and starter relay
2. Neutral start switch circuit*19±1

No initial combustion (Does not start)
1. ECM power source circuit
2. Ignition coil (w/ Igniter) circuit
3. Fuel pump control circuit
4. Fuel system05±124
05±103
05±131
11±1
No complete combustion (Does not start)
1. Fuel pump control circuit
2. Ignition coil (w/ Igniter) circuit
3. Fuel system05±131
05±103
11±1
Engine cranks normally (Difficult to start)
1. Starter signal circuit
2. ISC valve circuit
3. Fuel pump control circuit
4. Ignition coil (w/ Igniter)
5. Spark plug
6. Compression
7. Fuel system05±135
05±100
05±131
05±10318±3
14±111±1
Cold engine (Difficult to start)
1. Starter signal circuit
2. ISC valve circuit
3. Fuel pump control circuit
4. Fuel system
5. Ignition coil (w/ Igniter)
6. Spark plug05±135
05±100
05±131 11±1
05±103 18±3
Hot engine (Difficult to start)
1. Starter signal circuit
2. ISC valve circuit
3. Fuel pump control circuit
4. Fuel system
5. Ignition coil (w/ Igniter)
6. Spark plug05±135
05±100
05±131 11±1
05±103 18±3
Incorrect first idle (Poor idling)1. ISC valve circuit05±100
High engine idle speed (Poor idling)
1. ISC valve circuit
2. ECM power source circuit
3. Neutral start switch circuit*05±100
05±124

Low engine idle speed (Poor idling)
1. ISC valve circuit
2. Neutral start switch circuit*
3. Fuel pump control circuit
4. Fuel system05±100

05±131 11±1
Rough idling (Poor idling)
1. ISC valve circuit
2. ECM power source circuit
3. Fuel pump control circuit05±100
05±124
05±131
Hunting (Poor idling)
1. ISC valve circuit
2. ECM power source circuit
3. Fuel pump control circuit05±100
05±124
05±131
Hesitation/Poor acceleration (Poor drivability)
1. Fuel system
2. Fuel pump control circuit
3. Ignition coil (w/ Igniter) circuit11±1
05±131
05±103
Muffler explosion, after fire (Poor drivability)
1. Ignition coil (w/ Igniter) circuit
2. Spark plug
3. Fuel system05±103 18±3
11±1
Surging (Poor drivability)
1. Fuel pump control circuit
2. Spark plug
3. Fuel system05±131 18±3
11±1

±
DIAGNOSTICS SFI SYSTEM (1ZZ±FE/3ZZ±FE)
05±23
AVENSIS REPAIR MANUAL (RM1018E)
Engine stall (Soon after starting)
1. Fuel pump control circuit
2. ISC valve circuit05±131
05±100
Engine stall (After accelerator pedal released)
1. Injector circuit
2. ISC valve circuit
3. ECM11±8
05±100
05±20
Engine stall (When shifting from N to D)1. Neutral start switch circuit
2. ISC valve circuit

05±100
*: A/T only.

05C67±01
A66714
E13E12E10E9
05±20
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
TERMINALS OF ECM
Symbols (Terminals No.)Wiring ColorConditionSTD Voltage (V)
BATT (E9 ± 3) ± E1 (E12 ± 7)B±Y ± BRAlways8 to 14
FC (E9 ± 10) ± E1 (E12 ± 7)G±Y ±BRIG switch ON8 to 14
FC (E9 ± 10) ± E1 (E12 ± 7)G±Y ±BRIdlingBelow 1.5
W (E9 ± 11) ± E1 (E12 ± 7)W ±BRIdling8 to 14
W (E9 ± 11) ± E1 (E12 ± 7)W ±BRIG switch ONBelow 3.5
+B (E9 ± 1) ± E1 (E12 ± 7)B±R ±BRIG switch ON8 to 14
STP (E10 ± 19) ± E1 (E12 ± 7)G±W ±BRIG switch ON, brake pedal depressed8 to 14
STP (E10 ± 19) ± E1 (E12 ± 7)G±W ±BRIG switch ON, brake pedal releasedBelow 1.5
F/PS (E9 ± 14) ± E1 (E12 ± 7)LG±B ±BRIG switch ONPulse generation
STA (E12 ± 9) ± E1 (E12 ± 7)B±Y ±BRCranking5.5 or more
HT1B (E10 ± 4) ± E03 (E12 ± 5)P ±W±BIdlingBelow 3.0
HT1B (E10 ± 4) ± E03 (E12 ± 5)P ±W±BIG switch ON9 to 14
EMPS (E12 ± 29) ± E1 (E12 ± 7)GR ±BRIG switch ON8 to 14
SPD (E10 ± 17) ± E1 (E12 ± 7)V±W ±BRIG switch ON, rotate driving wheel slowlyPulse generation
(See page 05±98)
OX1B (E12 ± 21) ± E2 (E13 ± 28)B ±BRMaintain engine speed at 2,500 rpm for 2 min. after warning upPulse generation
(See page 05±91)
TACH (E9 ± 5) ± E1 (E12 ± 7)GR±R ±BRIdlingPulse generation
VC (E13 ± 18) ± E2 (E13 ± 28)R±W ±BRIG switch ON4.5 to 5.5
HT1A (E12 ± 4) ± E03 (E12 ± 5)Y ±W±BIdlingBelow 3.0
HT1A (E12 ± 4) ± E03 (E12 ± 5)Y ±W±BIG switch ON9 to 14
EVP1 (E13 ± 12) ± E01 (E13 ± 7)W±G ±W±BIG switch ON8 to 14
VG (E12 ± 24) ± EVG (E12 ± 32)G ±L±YIdling, A/C switch OFF1.1 to 1.5
OX1A (E12 ± 23) ± E2 (E13 ± 28)B ±BRMaintain engine speed at 2,500 rpm for 2 min. after warning upPulse generation
(See page 05±91)
THW (E13 ± 19) ± E2 (E13 ± 28)B±W ± BRIdling, Engine coolant temp. at 80
C (176
F)0.2 to 1.0
G2 (E13 ± 26)
± NE± (E13 ± 34)W ± RIdlingPulse generation
(See page 05±84)
NE+ (E13 ± 27) ± NE± (E13 ± 34)G ± RIdlingPulse generation
(See page 05±84)
THA (E13 ± 20) ± E2 (E13 ± 28)G±R ± BRIdling, intake air temp. at 20
C (68
F)0.5 to 3.4

±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
05±21
AVENSIS REPAIR MANUAL (RM1018E)
VTA (E13 ± 21) ± E2 (E13 ± 28)
L±W ±BRIG switch ON, throttle valve fully closed0.3 to 1.0
VTA (E13 ± 21) ± E2 (E13 ± 28)L±W ±BRIG switch ON, throttle valve fully open3.2 to 4.9
#10 (E13 ± 1) ± E01 (E13 ± 7)B±R ±W±BIG switch ON8 to 14
#20 (E13 ± 2) ± E01 (E13 ± 7)Y ±W±BIG switch ON8 to 14
#30 (E13 ± 3) ± E01 (E13 ± 7)W ±W±BIG switch ON8 to 14
#40 (E13 ± 4) ± E01 (E13 ± 7)B ±W±BIG switch ON8 to 14
IGT1 (E13 ± 8) ± E1 (E12 ± 7)R±W ±BRIdlingPulse generation
(See page 05±103)
IGT2 (E13 ± 9) ± E1 (E12 ± 7)P ± BRIdlingPulse generation
(See page 05±103)
IGT3 (E13 ± 10) ± E1 (E12 ± 7)LG±B ± BRIdlingPulse generation
(See page 05±103)
IGT4 (E13 ± 11) ± E1 (E12 ± 7)L±Y ± BRIdlingPulse generation
(See page 05±103)
IGF (E13 ± 23) ± E1 (E12 ± 7)W±R ± BRIG switch ON4.5 to 5.5
IGF (E13 ± 23) ± E1 (E12 ± 7)W±R ± BRIdlingPulse generation
(See page 05±103)
RSO (E13 ± 5) ± E01 (E13 ± 7)G±R ± W±BIG switch ON9 to 14
OCV+ (E13 ± 15) ± OCV± (E13 ± 14)W±G ± Y±BIG switch ONPulse generation
(See page 05±112)
FKN+ (E12 ± 1) ± FKN± (E12 ± 2)B ± WIdlingPulse generation
(See page 05±81)
ELS2 (E9 ± 13) ± E1 (E12 ± 7)G ± BRDefoger switch ON9 to 14
ELS2 (E9 ± 13) ± E1 (E12 ± 7)G ± BRIG switch ONBelow 3.0
MREL (E9 ± 8) ± E1 (E12 ± 7)GR ± BRIG switch ON9 to 14
IGSW (E9 ± 9) ± E1 (E12 ± 7)B±W ± BRIG switch ON9 to 14
TC (E9 ± 20) ± E1 (E12 ± 7)W±L ± BRIG switch ON9 to 14
SIL (E9 ± 18) ± E1 (E12 ± 7)W±G ± BRConnect hand±held tester to DLC3Pulse generation

05B3M±03
A79104
Fuel Pump
Circuit Opening Relay
ECM
DLC3
Camshaft Position
Sensor
Engine Coolant
Temperature Sensor
Camshaft Timig OIL
Control Valve Assy
Crankshaft
Position Sensor
Knock Sensor
Mass Air Flow Meter Assy
Heated Oxygen Sensor
(Bank 1 Sensor 1)
Engine Room R/B No.1
Heated Oxygen Sensor
(Bank 1 Sensor 2)
Engine Room R/B No.4
Ignition Coil and Igniter
Injector
Power Steering Oil
Pressure Switch
Idle Speed Control
Valve Assy
Throttle Position Sensor
Vacuum Switching Valve
(for ISC)
VSV for EVAP
± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
05±19
AVENSIS REPAIR MANUAL (RM1018E)
LOCATION