TOYOTA CAMRY 2000 Service Repair Manual

A00364
Vehicle Speed
60 ~ 120 km/h
(38 ~ 75 mph)
Idling
IG SW OFF
3 ~ 5 min.
Time
(1) (2)(3)(4)
± DIAGNOSTICSENGINE (1MZ±FE)
DI±341
576 Author: Date:
CONFIRMATION DRIVING PATTERN
(a) Connect the TOYOTA hand±held tester to the DLC3.
(b) Switch the TOYOTA hand±held tester from normal mode to check mode (See page DI±197).
(c) Start the engine and warm it up with all accessory switches OFF.
(d) Drive the vehicle at 60 ~ 120 km/h (38 ~ 75 mph) and engine speed at 1,600 ~ 3,200 rpm for 3 ~ 5 min.
HINT:
If a malfunction exists, the MIL will light up during step (4).
NOTICE:
If the conditions in this test are not strictly followed, detection of the malfunction will not be possible.
If you do not have a TOYOTA hand±held tester, turn the ignition switch OFF after performing steps
(3) and (4), then perform steps (3) and (4) again.
INSPECTION PROCEDURE
HINT:

If DTC P1130 is displayed, check Bank 1 Sensor 1 circuit.

If DTC P1150 is displayed, check Bank 2 Sensor 1 circuit.

Read frame freeze data using TOYOTA hand±held tester or OBD II scan tool. Because freeze frame
records the engine conditions when the malfunction is detected, when troubleshooting it is useful for
determining whether the vehicle was running or stopped, the engine warmed up or not, the air±fuel
ratio lean or rich, etc. at the time of the malfunction.
1 Are there any other codes (besides DTC P1130, P1150) being output?
YES Go to relevant DTC chart.
NO

DI±342
± DIAGNOSTICSENGINE (1MZ±FE)
577 Author: Date:
2 Connect the OBDII scan tool or TOYOTA hand±held tester and read value for
voltage output of A/F sensors (bank1, 2 sensor1).
PREPARATION:
(a) Connect the OBD II scan tool or TOYOTA hand±held tester to the DLC3.
(b) Warm up the A/F sensors (bank1, 2 sensor1) with the engine at 2,500 rpm for approx. 90 sec.
CHECK:
Read voltage of A/F sensors (bank 1, 2 sensor 1) on the screen of OBD II scan tool or TOYOTA hand±held
tester when you perform all the following conditions.
HINT:
The voltage of AFR
and AFL
terminals of ECM is fixed at 3.3 V and the voltage of AFR and AFL
terminals is fixed at 3.0 V. Therefore, it is impossible to check the A/F sensors (bank1, 2 sensor1) output
voltage at the terminals (AFR
, AFL
/AFR, AFL) of ECM.
OK:
ConditionA/F Sensor Voltage value
Engine idling
Engine racing
Not remains at 3.30 V (*0.660 V)

Not remains at38V(*0 76 V) or moreDriving at engine speed 1,500 rpm or more and vehicle
speed 40 km/h (25 mph) or more, and operate throttle
valve open and close.
Not remains at 3.8 V (*0.76 V) or more

Not remains at 2.8 V (*0.56 V) or less
*: When you use the OBD II scan tool (excluding TOYOTA hand±held tester)
HINT:

During fuel enrichment, there is a case that the output voltage of A/F sensors (bank1, 2 sensor1) is
below 2.8 V (* 0.56 V), it is normal.

During fuel cut, there is a case that the output voltage of A/F sensors (bank1, 2 sensor1) is above 3.8
V (* 0.76 V), it is normal.

If output voltage of A/F sensors (bank1, 2 sensor1) remains at 3.30 V (* 0.660 V) even after performing
all the above conditions, A/F sensors (bank1, 2 sensor1) circuit may be open.

If output voltage of A/F sensors (bank1, 2 sensor1) remains at 3.8 V (* 0.76V) or more, or 2.8 V (*0.56
V) or less even after performing all the above conditions, A/F sensors (bank1, 2 sensor1) circuit may
be short.
*: When you use the OBD II scan tool (excluding TOYOTA hand±held tester).
OK Go to step 9.
NG

± DIAGNOSTICSENGINE (1MZ±FE)
DI±343
578 Author: Date:
3 Check for open and short in harness and connector between ECM and A/F sen-
sors (bank 1, 2 sensor 1) (See page IN±31).
NG Repair or replace harness or connector.
OK
4 Check resistance of A/F sensor heater (See page SF±68).
NG Replace A/F sensor.
OK
5 Check air induction system (See page SF±1).
NG Repair or replace.
OK
6 Check EGR system (See page EC±11).
NG Replace EGR system.
OK
7 Check fuel pressure (See page SF±21).
NG Check and repair fuel pump, fuel pipe line and
filter (See page SF±1).
OK

DI±344
± DIAGNOSTICSENGINE (1MZ±FE)
579 Author: Date:
8 Check injector injection (See page SF±25).
NG Replace injector.
OK
Replace A/F sensors (bank1, 2 sensor1).
9 Perform confirmation driving pattern.
Go
10 Are there DTC P1130 and/or P1150 being output again ?
YES Check and replace ECM
(See page IN±31.).
NO
11 Did vehicle runs out of fuel in the past ?
NO Check for intermittent problems
(See page DI±197).
YES
DTC P1130 and /or P1150 is caused by running out of fuel.

± DIAGNOSTICSENGINE (1MZ±FE)
DI±345
580 Author: Date:
DTC P1133 A/F Sensor Circuit Response Malfunction
(Bank 1 Sensor 1) (Only for California Spec.)
DTC P1153 A/F Sensor Circuit Response Malfunction
(Bank 2 Sensor 1) (Only for California Spec.)
CIRCUIT DESCRIPTION
Refer to DTC P0125 (Insufficient Coolant Temp. for Closed Loop Fuel Control (Only for California Spec.))
on page DI±249.
DTC No.DTC Detecting ConditionTrouble Area
P1133
P1155
After engine is warmed up and during vehicle driving at
engine speed 1,400 rpm or more and vehicle speed 60
km/h (38 mph) or more, if response characteristic of A/F
sensor becomes deteriorated
(2 trip detection logic)

A/F sensors (bank 1, 2 sensor 1)
INSPECTION PROCEDURE
HINT:
Read freeze frame data using TOYOTA hand±held tester or OBD II scan tool. Because freeze frame records
the engine conditions when the malfunction is detected, when troubleshooting it is useful for determining
whether the vehicle was running or stopped, the engine warmed up or not, the air±fuel ratio lean or rich, etc.
at the time of the malfunction.
1 Are there any other codes (besides DTC P1133, P1153) being output?
YES Go to relevant DTC chart.
NO
DI1K7±03

DI±346
± DIAGNOSTICSENGINE (1MZ±FE)
581 Author: Date:
2 Connect the OBDII scan tool or TOYOTA hand±held tester and read value for
voltage output of A/F sensors (bank1, 2 sensor1).
PREPARATION:
(a) Connect the OBD II scan tool or TOYOTA hand±held tester to the DLC3.
(b) Warm up the A/F sensors (bank1, 2 sensor1) with the engine at 2,500 rpm for approx. 90 sec.
CHECK:
Read voltage of A/F sensors (bank 1, 2 sensor 1) on the screen of OBD II scan tool or TOYOTA hand±held
tester when you perform all the following conditions.
HINT:
The voltage of AFR
and AFL
terminals of ECM is fixed at 3.3 V and the voltage of AFR and AFL
terminals is fixed at 3.0 V. Therefore, it is impossible to check the A/F sensors (bank1, 2 sensor1) output
voltage at the terminals (AFR
, AFL
/AFR, AFL) of ECM.
OK:
ConditionA/F Sensor Voltage value
Engine idling
Engine racing
Not remains at 3.30 V (*0.660 V)

Not remains at38V(*0 76 V) or moreDriving at engine speed 1,500 rpm or more and vehicle
speed 40 km/h (25 mph) or more, and operate throttle
valve open and close.
Not remains at 3.8 V (*0.76 V) or more

Not remains at 2.8 V (*0.56 V) or less
*: When you use the OBD II scan tool (excluding TOYOTA hand±held tester)
HINT:

During fuel enrichment, there is a case that the output voltage of A/F sensors (bank1, 2 sensor1) is
below 2.8 V (* 0.56 V), it is normal.

During fuel cut, there is a case that the output voltage of A/F sensors (bank1, 2 sensor1) is above 3.8
V (* 0.76 V), it is normal.

If output voltage of A/F sensors (bank1, 2 sensor1) remains at 3.30 V (* 0.660 V) even after performing
all the above conditions, A/F sensors (bank1, 2 sensor1) circuit may be open.

If output voltage of A/F sensors (bank1, 2 sensor1) remains at 3.8 V (* 0.76V) or more, or 2.8 V (*0.56
V) or less even after performing all the above conditions, A/F sensors (bank1, 2 sensor1) circuit may
be short.
*: When you use the OBD II scan tool (excluding TOYOTA hand±held tester).
OK Go to step 9.
NG

± DIAGNOSTICSENGINE (1MZ±FE)
DI±347
582 Author: Date:
3 Check for open and short in harness and connector between ECM and A/F sen-
sors (bank 1, 2 sensor 1) (See page IN±31).
NG Repair or replace harness or connector.
OK
4 Check resistance of A/F sensor heater (See page SF±68).
NG Replace A/F sensor.
OK
5 Check air induction system (See page SF±1).
NG Repair or replace.
OK
6 Check EGR system (See page EC±11).
NG Replace EGR system.
OK
7 Check fuel pressure (See page SF±21).
NG Check and repair fuel pump, fuel pipe line and
filter (See page SF±1).
OK

DI±348
± DIAGNOSTICSENGINE (1MZ±FE)
583 Author: Date:
8 Check injector injection (See page SF±25).
NG Replace injector.
OK
Replace A/F sensors (bank1, 2 sensor1).
9 Perform confirmation driving pattern (See page DI±197).
Go
10 Are there DTC P1133 and/or P1153 being output again ?
YES Check and replace ECM
(See page IN±31).
NO
11 Did vehicle runs out of fuel in the past ?
NO Check for intermittent problems
(See page DI±197).
YES
DTC P1133 and /or P1153 is caused by running out of fuel.

A02509
HAFL (+)
HAFR (+)
± DIAGNOSTICSENGINE (1MZ±FE)
DI±349
584 Author: Date:
DTC P1135 A/F Sensor Heater Circuit Malfunction
(Bank 1 Sensor 1) (Only for California Spec.)
DTC P1155 A/F Sensor Heater Circuit Malfunction
(Bank 2 Sensor 1) (Only for California Spec.)
CIRCUIT DESCRIPTION
Refer to DTC P0125 (Insufficient Coolant Temp. for Closed Loop Fuel Control (Only for California Spec.))
on page DI±249.
DTC No.DTC Detecting ConditionTrouble Area
P1135
When heater operates, heater current exceeds 8 A
(2 trip detection logic)
Open or in heater circuit of A/F sensors
(bank 1, 2 sensor 1)P1135
P1155Heater current of 0.25 A or less when heater operates
(2 trip detection logic)
(bank 1, 2 sensor 1)

A/F sensors (bank 1, 2 sensor 1) heater

ECM
WIRING DIAGRAM
Refer to DTC P0125 (Insufficient Coolant Temp. for Closed Loop Fuel Control (Only for California Spec.))
on page DI±249.
INSPECTION PROCEDURE
HINT:
Read freeze frame data using TOYOTA hand±held tester or OBD II scan tool. Because freeze frame records
the engine conditions when the malfunction is detected, when troubleshooting it is useful for determining
whether the vehicle was running or stopped, the engine warmed up or not, the air±fuel ratio lean or rich, etc.
at the time of the malfunction.
1 Check voltage between terminal HAFR, HAFL of ECM connector and body
ground.
PREPARATION:
(a) Remove glove compartment (See page SF±73).
(b) Turn the ignition switch ON.
CHECK:
Measure voltage between terminals HAFR, HAFL of the ECM
connector and body ground.
OK:
Voltage: 9 ~ 14 V
OK Check and replace ECM (See page IN±31).
NG
DI1K8±04

DI±350
± DIAGNOSTICSENGINE (1MZ±FE)
585 Author: Date:
2 Check resistance of A/F sensor heaters (bank 1, 2 sensor 1) (See page SF±68).
NG Replace A/F sensors (bank 1, 2 sensor 1).
OK
Check and repair harness or connector between EFI main relay (Marking: EFI) and A/F sensors
(bank 1, 2 sensor 1), and A/F sensors (bank 1, 2 sensor 1) and ECM (See page IN±31).