Toyota Camry Manual page 1376

DTC P1135
DTC P1155
CIRCUIT DESCRIPTION
Refer to DTC P0125 (Insufficient Coolant Temp. for Closed Loop Fuel Control (Only for California Spec.))
on page DI–249.
DTC No.
When heater operates, heater current exceeds 8 A
(2 trip detection logic)
P1135 P1135
P1155
Heater current of 0.25 A or less when heater operates
(2 trip detection logic)
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.
HAFL (+)
HAFR (+)
NG
DIAGNOSTICS
A/F Sensor Heater Circuit Malfunction
(Bank 1 Sensor 1) (Only for California Spec.)
A/F Sensor Heater Circuit Malfunction
(Bank 2 Sensor 1) (Only for California Spec.)
DTC Detecting Condition
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
A02509
OK
– ENGINE (1MZ–FE)
D Open or in heater circuit of A/F sensors
(bank 1, 2 sensor 1) (bank 1, 2 sensor 1)
D A/F sensors (bank 1, 2 sensor 1) heater
D ECM
Check and replace ECM (See page IN–31).
Author :
DI–349
Trouble Area
Date :
DI1K8–04
584