TOYOTA CAMRY 1999 Service Repair Manual

± DIAGNOSTICSENGINE (5S±FE)
DI±69
304 Author: Date:
4 Check air induction system (See page SF±1).
NG Repair or replace.
OK
5 Check EGR system (See page EC±12).
NG Repair EGR system.
OK
6 Check fuel pressure (See page SF±6).
NG Check and repair fuel pump, fuel pipe line and
filter (See page SF±1).
OK
7 Check injector injection (See page SF±23).
NG Replace injector.
OK
Replace oxygen sensor
(bank 1 sensor 1).

DI±70
± DIAGNOSTICSENGINE (5S±FE)
305 Author: Date:
8 Perform confirmation driving pattern (See page DI±152).
Go
9 Is there DTC P0130 being output again?
NO Check for intermittent problems
(See page DI±3).
YES
Check and Replace ECM (See page IN±31).

± DIAGNOSTICSENGINE (5S±FE)
DI±71
306 Author: Date:
DTC P0133 Heated Oxygen Sensor Circuit Slow Re-
sponse (Bank 1 Sensor 1) (Ex. CA Spec.)
CIRCUIT DESCRIPTION
Refer to DTC P0125 (Insufficient Coolant Temp. for Closed Loop Fuel Control (Except California Spec.)) on
page DI±55.
DTC No.DTC Detecting ConditionTrouble Area
P0133
Response time for heated oxygen sensor's voltage output to
change from rich to lean, or from lean to rich, is 1 sec. or more
during idling after engine is warmed up
(2 trip detection logic)

Heated oxygen sensor

Fuel trim malfunction
HINT:
Sensor 1 refers to the sensor closer to the engine body.
INSPECTION PROCEDURE
HINT:
Read freeze frame data using TOYOTA hand±held tester or OBD II scantool. 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 P0133) being output?
YES Go to relevant DTC chart.
NO
DI4NF±01

P18349
DI±72
± DIAGNOSTICSENGINE (5S±FE)
307 Author: Date:
2 Check output voltage of heated oxygen sensor during idling.
PREPARATION:
Warm up the heated oxygen sensor the engine at 2,500 rpm for approx. 90 sec.
CHECK:
Use the OBD II scan tool or TOYOTA hand±held tester to read the output voltage of the heated oxygen sen-
sor during idling.
OK:
Heated oxygen sensor output voltage:
Alternates repeatedly between less than 0.4 V and more than 0.55 V (See the following table).
OK Go to step 8.
NG
3 Check for open and short in harness and connector between ECM and oxygen
sensor (See page IN±31).
NG Repair or replace harness or connector.
OK

± DIAGNOSTICSENGINE (5S±FE)
DI±73
308 Author: Date:
4 Check air induction system (See page SF±1).
NG Repair or replace.
OK
5 Check EGR system (See page EC±12).
NG Replace EGR system.
OK
6 Check fuel pressure (See page SF±6).
NG Check and repair fuel pump, fuel pipe line and
filter (See page SF±1).
OK
7 Check injector injection (See page SF±23).
NG Replace injector.
OK
Replace oxygen sensor
(bank 1 sensor 1).

DI±74
± DIAGNOSTICSENGINE (5S±FE)
309 Author: Date:
8 Perform confirmation driving pattern (See page DI±152).
Go
9 Is there DTC P0133 being output again?
NG Check for intermittent problems
(See page DI±3).
YES
Check and replace ECM (See page IN±31).

± DIAGNOSTICSENGINE (5S±FE)
DI±75
310 Author: Date:
DTC P0135 Heated Oxygen Sensor Heater Circuit Mal-
function (Bank 1 Sensor 1) (Ex. CA Spec.)
DTC P0141 Heated Oxygen Sensor Heater Circuit
Malfunction (Bank 1 Sensor 2)
CIRCUIT DESCRIPTION
Refer to DTC P0125 (Insufficient Coolant Temp. for Closed Loop Fuel Control (Except California Spec.)) on
page DI±55.
DTC No.DTC Detecting ConditionTrouble Area
P0135
P0141When heater operates, heater current exceeds 2 A
(2 trip detection logic)
Open or short in heater circuit of heated oxygen sensor
Htd htP0135
P0141Heater current of 0.2 A or less when heater operates
(2 trip detection logic)
Heated oxygen sensor heater

ECM
HINT:

Sensor 1 refers to the sensor closer to the engine body.

Sensor 2 refers to the sensor farther away from the engine body.
WIRING DIAGRAM
Refer to DTC P0125 (Insufficient Coolant Temp. for Closed Loop Fuel Control (Except California Spec.)) on
page DI±55.
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.
DI00X±04

A03014A03415
ON
HT1
HT2
w/o Immobiliser
w/ Immobiliser
HT1
HT2
DI±76
± DIAGNOSTICSENGINE (5S±FE)
311 Author: Date:
1 Check voltage between terminals HT1, HT2 of ECM connector and body ground.
PREPARATION:
(a) Remove the glove compartment (See page SF±64).
(b) Turn the ignition switch ON.
CHECK:
Measure voltage between terminals HT1, HT2 of the ECM con-
nector and body ground.
HINT:

Connect terminal HT1 to bank 1 sensor 1.

Connect terminal HT2 to bank 1 sensor 2.
OK:
Voltage: 9 ~ 14 V
OK Check and replace ECM (See page IN±31).

NG
2 Check resistance of heated oxygen sensor heaters
(See pages SF±61, SF±63).
NG Replace heated oxygen sensor.
OK
Check and repair harness or connector between EFI main relay (Marking: EFI) and heated oxygen
sensor, and heated oxygen sensor and ECM. (See page IN±31).

± DIAGNOSTICSENGINE (5S±FE)
DI±77
312 Author: Date:
DTC P0136 Heated Oxygen Sensor Circuit Malfunction
(Bank 1 Sensor 2)
CIRCUIT DESCRIPTION
Refer to DTC P0125 (Insufficient Coolant Temp. for Closed Loop Fuel Control (Except California Spec.)) on
page DI±55.
DTC No.DTC Detecting ConditionTrouble Area
P0136
Voltage output of heated oxygen sensor remains at
0.45*
1/0.40*2 V or more, or 0.60*1/0.50*2 V or less when ve-
hicle is driven at 40 km/h (25 mph) or more after engine is
warmed up
*
1: for California Spec.
*
2: except California Spec.
(2 trip detection logic).

Heated oxygen sensor
HINT:
Sensor 2 refers to the sensor farther away from the engine body.
WIRING DIAGRAM
Refer to DTC P0125 (Insufficient Coolant Temp. for Closed Loop Fuel Control (Except California Spec.)) on
page DI±55.
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 P0136) being output?
YES Go to relevant DTC chart.
NO
DI00Y±08

DI±78
± DIAGNOSTICSENGINE (5S±FE)
313 Author: Date:
2 Check for open and short in harness and connector between ECM and heated
oxygen sensor (See page IN±31).
NG Repair or replace harness or connector.
OK
3 Check output voltage of heated oxygen sensor.
PREPARATION:
(a) Connect the OBD II scan tool or TOYOTA hand±held tester to the DLC3.
(b) Warm up the engine to normal operating temp.
CHECK:
Read voltage output of the heated oxygen sensor when the engine suddenly raced.
HINT:
Perform quick racing to 4,000 rpm 3 min. using the accelerator pedal.
OK:
Heated oxygen sensor output voltage:
Alternates from 0.45*
1/0.40*2 V or less to 0.60*1/0.50*2 V or more.
*1: for California Spec.
*
2: except California Spec.
OK Check that each connector is properly
connected.
NG
Replace heated oxygen sensor.