2000 TOYOTA CAMRY test fuel

± DIAGNOSTICSENGINE (5S±FE)
DI±157
392 Author: Date:
DTC P1133 A/F Sensor Circuit Response Malfunction
(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±61.
DTC No.DTC Detecting ConditionTrouble Area
P1133
After engine is warmed up, and during vehicle driving at en-
gine speed 1,600 rpm or more and vehicle speed 60 km/h (38
mph) or more, if response characteristic of A/F sensor be-
comes deteriorated
(2 trip detection logic)

A/F sensor
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) being output?
YES Go to relevant DTC chart.
NO
DI01E±06

DI±158
± DIAGNOSTICSENGINE (5S±FE)
393 Author: Date:
2 Connect OBD II scan tool or TOYOTA nand±held teter, and read value for voltage
output of A/F sensor.
PREPARATION:
(a) Connect the OBD II scan tool or TOYOTA hand±held tester to the DLC3.
(b) Warm up the A/F sensor with the engine at 2,500 rpm for approx. 90 sec.
CHECK:
Read voltage value of the A/F sensor on the screen of OBD II scan tool or TOYOTA hand±held tester when
you perform all the following conditions.
HINT:
The voltage of AF
terminal of ECM is 3.3 V fixed and AF terminal is 3.0 V fixed. Therefore, it is impossible
to check the A/F sensor output voltage at the terminals (AF
/AF) 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 the A/F sensor is below 2.8 V (* 0.56
V), it is normal.

During fuel cut, there is a case that the output voltage of the A/F sensor is above 3.8 V (* 0.76 V), it
is normally.

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

If output voltage of the A/F sensor remains at 3.8 V (* 0.76 V) or more, or 2.8 V (* 0.56 V) or less even
after performing all the above conditions, A/F sensor circuit may be short.
*: When you use the OBD II scan tool (excluding TOYOTA hand±held tester).
OK Go to step 9.
NG
3 Check for open and short in harness and connector between ECM and A/F sen-
sor (See page IN±31).
NG Repair or replace harness or connector.
OK

A00430
HTAF (+) ON
± DIAGNOSTICSENGINE (5S±FE)
DI±161
396 Author: Date:
DTC P1135 A/F Sensor Heater Circuit Malfunction
(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±61.
DTC No.DTC Detecting ConditionTrouble Area
P1135
When heater operates, heater current exceeds 8 A
(2 trip detection logic)
Open or short in heater circuit of A/F sensor
A/F h tP1135Heater current of 0.25 A or less when heater operates
(2 trip detection logic)
A/F sensor heater

ECM
WIRING DIAGRAM
Refer to DTC P0125 (Insufficient Coolant Temp. for Closed Loop Fuel Control (Only for California Spec.))
on page DI±61.
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 HTAF 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 HTAF of the ECM connec-
tor and body ground.
OK:
Voltage: 9 ~ 14 V
OK Check and replace ECM (See page IN±31).
NG
DI01F±05

A07122
IG Switch
B±R
BatteryEngine Room
J/B No.2
76B±R13
1II3B±R
B
BR
Spark Plug
Spark Plug
2
3 2
3 4
Tr2 Igniter
No.1
Ignition
Coil
No.1
FL Block
Y±R
BR
B
20
19
IGT2
Tr1
E9
E9
E9
W±R
IGT1
IGF5 V
Tr1
Ignition Coil
No.2
Igniter
No.2
AA A
EC
Tr2
W±R
B±R 5 51B 1K
Instrument
W±R
W±R
2L 2A
4 1
AM2B
F4 F6 1
1
B±G
MAIN FL
3 1
4
J/C J25
*1: w/o Immobiliser
*2: w/ Immobiliser(*1) (*2)
ECM
E9 23
E9 22
E9 17
(*1) (*2)
W±R
Panel J/BB
B
BR
BR J19
J/C
DI±164
± DIAGNOSTICSENGINE (5S±FE)
399 Author: Date:
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:

If DTC P1300 is displayed, check ignition coil No.1 circuit.

If DTC P1300 is displayed, check ignition coil No.2 circuit.

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 for spark plug and spark of misifining cylinder (See page DI±89).
NG Go to step 4.
OK
2 Check for open and short in harness and connector in IGF signal circuit between
ECM and ignition coils (See page IN±31).
NG Repair or replace harness or connector.
OK

± DIAGNOSTICSENGINE (5S±FE)
DI±171
406 Author: Date:
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 operation of stop light.
PREPARATION:
Check if the stop lights go on and off normally when the brake pedal is operated and released.
NG Check and repair stop light circuit
(See page BE±37).
OK

A03605
Engine Room J/B No.2
EFI11
B
Battery B±G11
2A E7ECM
F4BATT
2JB±Y
F68
FL Block
MAIN FL
*1: w/o Immobiliser
*2: w/ Immobiliser(*1)
(*2)
E72
± DIAGNOSTICSENGINE (5S±FE)
DI±173
408 Author: Date:
DTC P1600 ECM BATT Malfunction
CIRCUIT DESCRIPTION
Battery positive voltage is supplied to terminal BATT of the ECM even when the ignition switch is OFF for
use by the DTC memory and air±fuel ratio adaptive control value memory, etc.
DTC No.DTC Detecting ConditionTrouble Area
P1600Open in back up power source circuit
Open in back up power source circuit

ECM
HINT:
If DTC P1600 appear, the ECM does not store another DTC.
WIRING DIAGRAM
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.
DI01I±10

± DIAGNOSTICSENGINE (5S±FE)
DI±175
410 Author: Date:
DTC P1780 Park/Neutral Position Switch Malfunction
(Only for A/T)
CIRCUIT DESCRIPTION
The park/neutral position switch goes on when the shift lever is in the N or P shift position. When it goes on
terminal NSW of the ECM is grounded to body ground via the starter relay thus the terminal NSW voltage
becomes 0V. When the shift lever is in the D, 2, L or R position, the park/neutral position switch goes off,
so the voltage of ECM. Terminal NSW becomes battery positive voltage, the voltage of the ECM internal
power source.
If the shift lever is moved from the N position to the D position, this signal is used for air±fuel ratio correction
and for idle speed control (estimated control), etc.

DTC No.DTC Detecting ConditionTrouble Area
2 or more switches are ON simultaneously for P, R, N, D, 2
and L positions
(2 trip detection logic)
Sh t i k/ t l iti it h i it
P1780When driving under conditions (a) and (b) for 30 sec. or more
park/neutral position switch is ON (N position):
(2 trip detection logic)
(a) Vehicle speed: 80 km/h (50 mph) or more
(b) Engine speed: 2,000 ~ 5,000 rpm
Short in park/neutral position switch circuit

Park/neutral position switch

ECM
HINT:
After confirming DTC P1780, use the TOYOTA hand±held tester to confirm the PNP switch signal from the
CURRENT DATA.
WIRING DIAGRAM
Refer to DTC P1780 on page DI±424.
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.
Refer to DTC P1780 on DI±424.
DI01J±05

± DIAGNOSTICSENGINE (5S±FE)
DI±185
420 Author: Date:
INSPECTION PROCEDURE
TOYOTA hand±held tester:
1 Connect TOYOTA hand±held tester, and check operation of fuel pump
(See page DI±3).
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI±28).
NG
2 Check for ECM power source circuit (See page DI±179).
NG Repair or replace.
OK
3 Check circuit opening relay (Marking: CIR OPN) (See page SF±41).
NG Replace circuit opening relay.
OK