1999 TOYOTA CAMRY Service Repair Manual

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TOYOTA CAMRY 1999  Service Repair Manual ± DIAGNOSTICSENGINE (1MZ±FE)
DI±261
496 Author: Date:
5 Check EGR system (See page EC±11).
NG Replace EGR system.
OK
6 Check fuel pressure (See page SF±1).
NG Check and repair fuel pump, fuel p

Page 1474 of 4592

TOYOTA CAMRY 1999  Service Repair Manual DI±262
± DIAGNOSTICSENGINE (1MZ±FE)
497 Author: Date:
9 Are there DTC P0133 and/or P0153 being output again ?
NO Check for intermittent problems
(see page DI±197).
YES
Check and Replace ECM
(See

Page 1475 of 4592

TOYOTA CAMRY 1999  Service Repair Manual ± DIAGNOSTICSENGINE (1MZ±FE)
DI±263
498 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 Ma

Page 1476 of 4592

TOYOTA CAMRY 1999  Service Repair Manual A02023
ON
HTL (+) HTR (+) HTS (+)
DI±264
± DIAGNOSTICSENGINE (1MZ±FE)
499 Author: Date:
1 Check voltage between terminals HTR, HTS, HTL of ECM connectors and body
ground.
PREPARATION:
(a) Remove

Page 1477 of 4592

TOYOTA CAMRY 1999  Service Repair Manual ± DIAGNOSTICSENGINE (1MZ±FE)
DI±265
500 Author: Date:
DTC P0136 Heated Oxygen Sensor Circuit Malfunction
(Bank 1 Sensor 2)
CIRCUIT DESCRIPTION
Refer to DTC P0125 (Insufficient Coolant Temp. for C

Page 1478 of 4592

TOYOTA CAMRY 1999  Service Repair Manual DI±266
± DIAGNOSTICSENGINE (1MZ±FE)
501 Author: Date:
3 Check output voltage of heated oxygen sensor (bank 1 sensor 2).
PREPARATION:
(a) Connect  the OBD II scan tool or TOYOTA hand±held tester

Page 1479 of 4592

TOYOTA CAMRY 1999  Service Repair Manual ± DIAGNOSTICSENGINE (1MZ±FE)
DI±267
502 Author: Date:
DTC P0171 System too Lean (Fuel Trim) 
(Only for California Spec.)
DTC P0172 System too Rich (Fuel Trim)
(Only for California Spec.)
CIRCUIT

Page 1480 of 4592

TOYOTA CAMRY 1999  Service Repair Manual DI±268
± DIAGNOSTICSENGINE (1MZ±FE)
503 Author: Date:
HINT:
When the DTC P0171 is recorded, the actual air±fuel ratio is on the lean side. When DTC P0172 is
recorded, the actual air±fuel ratio