A78602
EFI RelayHeater
Sensor OX1A
HT1AECM
From
Battery EFI Fuse
E2
MREL
Reference (Sensor 1 System Diagram):
Heated Oxygen Sensor
OX
HT
E1
+B
–
DIAGNOSTICS SFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
05–43
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
DTC P0031 OXYGEN SENSOR HEATER CONTROL
CIRCUIT LOW (BANK 1 SENSOR 1)
DTC P0032 OXYGEN SENSOR HEATER CONTROL CIRCUIT HIGH (BANK 1 SENSOR 1)
CIRCUIT DESCRIPTION
Refer to DTC P0130 on page 05–74.
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
P0031Heated current is 0.8 A or less when heater operates
(1 trip detection logic)
Open or short in heater circuit of heated oxygen sensor
Heated oxygen sensor heater (sensor 1)
EFI relay
ECM
P0032Heated current exceeds 10 A when the heater operates
(1 trip detection logic)
Open or short in heater circuit of heated oxygen sensor
Heated oxygen sensor heater (sensor 1)
EFI relay
ECM
HINT:
Sensor 1 refers to the sensor mounted in front of the Three–Way Catalytic Converter (TWC) and lo-
cated near the engine assembly.
Sensor 2 refers to the sensor mounted behind the TWC and located far fro\
m the engine assembly.
WIRING DIAGRAM
Refer to DTC P0130 on page 05–74.
05KNV–02
A93656
ECM
STA E1312
B–Y
IJW–BJ12 BB J13J/C W–B 1 5
32 1AM2 2
B–G
B–R1
S51S4
Starter
Battery7
IK1
FL MAIN 4B 4A
Engine Room
J/B No. 4
BB 55
5 1
11A
B–GB–R
IE41
(LHD)IP11
(RHD)B–R
Engine
Room
R/B No. 1
Engine
Room
J/B No.1
Driver
Side R/BST
Relay
2DJ
9DA Driver
Side J/B B–R
B–RI13
Ignition Switch
4 5 B–Y
B–Y
6
2ST 1
6 Fuse
Block
B–WB–YB–Y
J12 AC J13
A J12 1
1
(M/T)
B–W
(A/T)
N1
Neutral Start Switch96B–Y
(A/T)E1 E13
EH BR
55
– DIAGNOSTICSSFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
05–171
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
DTC P0617 STARTER RELAY CIRCUIT HIGH
CIRCUIT DESCRIPTION
While the engine is being cranked, the positive battery voltage is applied to terminal STA of the ECM.
DTC No.DTC Detection ConditionTrouble Area
P0617
When conditions (a), (b) and (c) are met when the battery volt-
age of 10.5 V or more is applied for 20 seconds
(a) Vehicle speed greater than 20 km/h (12 mph)
(b) Engine RPM greater than 1,000 rpm
(c) STA signal ONShort in park/neutral position switch circuit (MMT)
Short in STA circuit
Park/neutral position switch (MMT)
ECM
WIRING DIAGRAM
05KOC–02
