fuse TOYOTA AVENSIS 2005 Service Owner's Manual

B50489Ignition Switch
I13
A18294ECM Connecter
E12E9
E1 (±)MREL (+)
A66054
Engine Room R/B No.1
EFI Fuse
05±128
± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
7 INSPECT IGNITION OR STARTER SWITCH ASSY
(a) Measure the resistance between the connector terminals
shown in the chart below.
SwitchTerminal No.Resisitance
LOCKAll Terminals1M
or more
ACC1±31
or less
ON1±2, 1±3, 2±3, 5±61
or less
START4±5, 4±6, 5±6, 1±21
or less
NG REPLACE IGNITION OR STARTER SWITCH
ASSY
OK
CHECK AND REPAIR HARNESS AND CONNECTOR (BATTERY ± IGNITION SWITCH, IGNITION
SWITCH ± ECM)
8 INSPECT ECM(MREL VOLTAGE)
(a) Turn the ignition switch ON.
(b) Measure the voltage between the terminals of the E9 and
E12 ECM connector.
Standard:
Symbols (Terminal No.)Specified condition
MREL (E9±8) ± E1 (E12±7)9 to 14 V
NG CHECK AND REPLACE ECM
OK
9 CHECK FUSE(EFI FUSE)
(a) Remove the EFI fuse from the engine room R/B No.1.
(b) Check for continuity in the EFI fuse.
Standard: Continuity
NG CHECK FOR SHORT IN ALL HARNESSES AND
COMPONENTS CONNECTED FUSE
OK




A79065
Engine Room R/B No.4
EFI No.1 Fuse
B16200
± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
05±129
AVENSIS REPAIR MANUAL (RM1018E)
10 CHECK FUSE(EFI No.1 FUSE)
(a) Remove the EFI No.1 fuse from the engine room R/B
No.4.
(b) Check for continuity in the EFI No.1 fuse.
Standard: Continuity
NG CHECK FOR SHORT IN ALL HARNESSES AND
COMPONENTS CONNECTED FUSE
OK
11 INSPECT EFI RELAY
(a) Remove the EFI relay from the engine room R/B No.4.
(b) Inspect the EFI relay.
Standard:
Terminal No.Specified condition
1 ± 2Continuity
No Continuity
3 ± 5Continuity
(Apply battery voltage Terminals 1 and 2)
NG REPLACE EFI RELAY
OK

A66053
Engine Room R/B No.4
EFI Relay



A79066
Engine Room R/B No.4
EFI No.1 Fuse
1
2
A65748
MREL
E9
ECM Connector
+B
05±130
± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
12 CHECK HARNESS AND CONNECTOR(EFI RELAY ± ECM, EFI RELAY ± BODY
GROUND)
(a) Check the harness and connector between the EFI relay
and ECM connector.
(1) Remove the EFI relay from the engine room R/B
No.4.
(2) Remove the EFI No.1 fuse from the engine room
R/B No.4.
(3) Disconnect the E9 ECM connector.
(4) Check for continuity between the wire harness side
connectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
EFI relay (1) ± MREL (E9±8)
EFI relay (3) ± EFI No.1 fuse (1)Continuity
EFI No.1 fuse (2) ± +B (E9±1)
y
Standard (Check for short):
Symbols (Terminal No.)Specified condition
EFI relay (1) or MREL (E9±8) ± Body ground
EFI relay (3) or EFI No.1 fuse (1) ± Body groundNo continuity
EFI No.1 fuse (2) or +B (E9±1) ± Body ground
y
(b) Check the harness and connector between the EFI relay
and body ground.
(1) Remove the EFI relay from the engine room J/B
No.4.
(2) Check for continuity between the wire harness side
connector and the body ground.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
EFI relay (2) ± Body groundContinuity
OK REPAIR OR REPLACE HARNESS OR
CONNECTOR
NG
CHECK AND REPAIR HARNESS AND CONNECTOR (TERMINAL +B OF ECM ± BATTERY POS-
ITIVE TERMINAL)

\bA79115
Reference (Bank 1 Sensor 2 System Drawing)Heated Oxygen Sensor
EFI Relay
Heater
SensorOX1B HT1BECM
From
Battery EFI Fuse
O1B±
MREL
EFI No.2 Fuse
05±218
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
DTCP0141/27OXYGEN SENSOR HEATER CIRCUIT MALFUNCTION (BANK 1 SENSOR 2)
DTCP0161/29OXYGEN SENSOR HEATER CIRCUIT (BANK 2 SENSOR 2)
CIRCUIT DESCRIPTION
Refer to DTC P0136/27 on page 05±211.
HINT:
The ECM provides a pulse width modulated control circuit to adjust current \
through the heater. The heated
oxygen sensor heater circuit uses a relay on the B+ side of the circuit.
DTC No.DTC Detection ConditionTrouble Area
P0141/27
Heated current is 0.2 A or less when heater operates
(1 trip detection logic)
Open or short in heater circuit of heated oxygen sensor

Heated oxygen sensor heater
P0141/27
P0161/29When heater operates, heated current exceeds 2 A
(1 trip detection logic)
yg

EFI relay

ECM
HINT:

Bank 1 refers to the bank that includes cylinder No.1.

Bank 2 refers to the bank that does not include cylinder No.1.

Sensor 1 refers to the sensor closest to the engine assembly.

Sensor 2 refers to the sensor farthest away from the engine assembly.
WIRING DIAGRAM
Refer to DTC P0136/27 on page 05±211.
INSPECTION PROCEDURE
HINT:

If different DTCs that are related to a different system are output simultaneously while terminal E2 is
used as a ground terminal, terminal E2 may be open.

Read freeze frame data using 
\f

\f \f\f Freeze frame data records the engine conditions
when a malfunction is detected. When troubleshooting, it is useful for d\
etermining whether the vehicle
was running or stopped, the engine was warmed up or not, the air±fuel ra\
tio was lean or rich, etc. at
the time of the malfunction.
05C6Y±01




A79069
Engine Room R/B No.4
EFI No.2 Fuse
05±220
± DIAGNOSTICSSFI SYSTEM (1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
4 CHECK FUSE(EFI No.2)
(a) Remove the EFI No.2 fuse from the engine room R/B
No.4.
(b) Check for continuity in the EFI No.4 fuse.
Standard: Continuity
NG CHECK FOR SHORT IN ALL HARNESS AND
COMPONENTS CONNECTED FUSE
OK

A79118
Wire Harness SideBank 1
Sensor 2
Bank 2
Sensor 2 H8
H10
Heated Oxygen Sensor Connector +B
HT
A65744
HT2B
E10
ECM Connector
HT1B


 
A79070
Engine Room R/B No.4
1 2
EFI No.2 Fuse
A66053
Engine Room R/B No.4
EFI Relay
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
05±221
AVENSIS REPAIR MANUAL (RM1018E)
5CHECK HARNESS AND CONNECTOR(HEATED OXYGEN SENSOR ± ECM,
HEATED OXYGEN SENSOR ± EFI RELAY)
(a)Check the harness and connector between the ECM and
heated oxygen sensor connectors.
(1)Disconnect the H8 or H10 heated oxygen sensorconnector.
(2)Disconnect the E10 ECM connector.
(3)Check for continuity between the wire harness side connectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
HT (H8±1) ± HT1B (E10±4)ContinuityHT (H10±1) ± HT2B (E10±3)Continuity
Standard (Check for short):
Symbols (Terminal No.)Specified condition
HT (H8±1)or HT1B (E10±4) ± Body groundNocontinuityHT (H10±1)or HT2B (E10±3) ± Body groundNo continuity
(b)Check the harness and connector between the heated oxygen sensor connector and EFI relay.
(1)Disconnect the H8 or H10 heated oxygen sensorconnector.
(2)Remove the EFI No.2 fuse from the engine room
R/B No.4.
(3)Remove the EFI relay from the engine room R/B No.4.
(4)Check for continuity between the wire harness side connectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
+B (H8±2) ± EFI No.2 fuse (2)
+B (H10±2) ± EFI No.2 fuse (2)Continuity
EFI No.2 fuse (1) ± EFI relay (3)
y
Standard (Check for short):
Symbols (Terminal No.)Specified condition
+B (H8±2) or EFI No.2 fuse (2) ± Body ground
+B (H10±2) or EFI No.2 fuse (2) ± Body groundNo continuity
EFI No.2 fuse (1) or EFI relay (3) ± Body ground
y
NGREPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CHECK AND REPLACE ECM (See page 01±32)

B16200
A79118
Wire Harness Side
Bank 1
Sensor 2
Bank 2
Sensor 2H8
H10
Heated Oxygen Sensor ConnectorOX
HT
A65747
HT1BHT2B
E12E10
ECM Connector
OX1BOX2B

A79115
Heated Oxygen Sensor
EFI Relay
Heater
Sensor
OX1B HT1B
Duty
Control ECM
From
Battery
EFI Fuse
O1B±
MREL Reference (Bank 1 Sensor 2 System Drawing)
EFI No.2 Fuse 05±216
± DIAGNOSTICSSFI SYSTEM (1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
4 INSPECT EFI RELAY
(a) Remove the EFI relay from the engine room R/B No.4.
(b) Inspect the EFI relay.
Standard:
Terminal No.Specified condition
1 ± 2Continuity
No Continuity
3 ± 5Continuity
(Apply battery voltage Terminals 1 and 2)
NG REPLACE EFI RELAY
OK
5 CHECK HARNESS AND CONNECTOR(HEATED OXYGEN SENSOR ± ECM)
(a) Disconnect the H8 or H10 heated oxygen sensor connec-
tor.
(b) Disconnect the E10 and E12 ECM connector.
(c) Check for continuity between the wire harness side con-
nectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
OX (H8±3) ± OX1B (E12±21)
HT (H8±1) ± HT1B (E10±4)ContinuityOX (H10±3) ± OX2B (E12±29)Continuity
HT (H10±1) ± HT2B (E10±3)
Standard (Check for short):
Symbols (Terminal No.)Specified condition
OX (H8±3) or OX1B (E12±21) ± Body ground
HT (H8±1) or HT1B (E10±4) ± Body groundNo continuityOX (H10±3) or OX2B (E12±29) ± Body groundNo continuity
HT (H10±1) or HT2B (E10±3) ± Body ground

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±190
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
5CHECK HARNESS AND CONNECTOR(MASS AIR FLOW METER ± EFI RELAY)
(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 FOR ECM POWER SOURCE CIRCUIT (See page 05±257)
6 INSPECT ECM(SENSOR GROUND)
(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
NG CHECK AND REPLACE ECM (See page 01±32)
OK

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
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
05±193
AVENSIS REPAIR MANUAL (RM1018E)
4CHECK HARNESS AND CONNECTOR(MASS AIR FLOW METER ± EFI RELAY)
(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 FOR ECM POWER SOURCE CIRCUIT (See page 05±257)

B62793
Reference (Bank 1 Sensor 1 System Drawing)A/F Sensor
A/F Relay
Heater
Sensor A1A+ HA1A
Duty
Control
ECM
From
Battery A/F Fuse
A1A±
MREL
05±182
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
DTCP0031/21OXYGEN (A/F) SENSOR HEATER CONTROL CIRCUIT LOW (BANK 1 SENSOR 1)
DTCP0032/21OXYGEN (A/F) SENSOR HEATER CONTROL CIRCUIT HIGH (BANK 1 SENSOR 1)
DTCP0051/28OXYGEN (A/F) SENSOR HEATER CONTROL CIRCUIT LOW (BANK 2 SENSOR 1)
DTCP0052/28OXYGEN (A/F) SENSOR HEATER CONTROL CIRCUIT HIGH (BANK 2 SENSOR 1)
CIRCUIT DESCRIPTION
Refer to DTC P2237/21 on page 05±248.
HINT:

These DTCs are related to the air fuel raito (A/F) sensor, although the caption is the heated oxygen
sensor.

The ECM provides a pulse width modulated control circuit to adjust curre\
nt through the heater. The
heated oxygen sensor heater circuit uses a relay on the B+ side of the c\
ircuit.
DTC No.DTC Detection ConditionTrouble Area
P0031/21
P0051/28Heated current is 0.8 A or less when heater operates
(1 trip detection logic)
Open or short in heater circuit of A/F sensor

A/F sensor heater
P0032/21
P0052/28When the heater operates, heated current exceeds 19.7 A
(1 trip detection logic)
A/F relay

ECM
HINT:

Bank 1 refers to the bank that includes cylinder No.1.

Bank 2 refers to the bank that does not include cylinder No.1.

Sensor 1 refers to the sensor closest to the engine assembly.

Sensor 2 refers to the sensor farthest away from the engine assembly.
05C6T±01