2001 TOYOTA HIGHLANDER diagnostic menu

A72304
Engine
RPMEngine
RPM (1) Idle (2) Approximately 2,500 rpm
Fuel Cut
When A/F sensor circuit is malfunctioning,
voltage output does not change A/F
Sensor
Voltage A/F
Sensor
Voltage
(1) Idle
Fuel Cut (3) Approximately 4,000 rpm
ºCondition (1), (2)º
Change of approximately 3.3 V Normal Condition
Malfunction Condition
ºCondition (3)º
3.8 V or More(1) Idle (2) Approximately 2,500 rpm(3) Approximately 4,000 rpm
(1) Idle
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
8 CHECK FOR EXHAUST GAS LEAKS
OK: No gas leak.
NG REPAIR OR REPLACE EXHAUST GAS
LEAKAGE POINT (See page 15-2)
OK
9 READ VALUE OF HAND-HELD TESTER OR OBD II SCAN TOOL (OUTPUT
VOLTAGE OF AIR FUEL RATIO SENSOR (BANK 1 SENSOR 1))
(a) Connect the hand-held tester or the OBD II scan tool to the DLC3.
(b) Warm up the A/F sensor (bank 1 sensor 1) by running the engine at 2,500 rpm for approximately 90
seconds.
(c) Read A/F sensor voltage output on the hand-held tester or the OBD II scan tool.
(d) Hand-held tester only:
Enter the following menus: ENHANCED OBD II / SNAPSHOT / MANUAL SNAPSHOT / USER DATA.
(e) Select ºAFS B1 S1 / ENGINE SPDº and press YES.
(f) Monitor the A/F sensor voltage carefully.
(g) Check the A/F sensor voltage output under the following conditions:
(1) Allow the engine to idle for 30 seconds.
(2) Running the engine at approximately 2,500 rpm (where engine RPM is not suddenly changed).
(3) Raise the engine speed to 4,000 rpm and quickly release the accelerator pedal so that the throttle
is fully closed.
Standard:
Condition (1) and (2)
Voltage change of 3.3 V (0.66 V)* (between approximately 3.1 to 3.5 V), as shown in the illustra-
tion.
Condition (3)
A/F sensor voltage increases to 3.8 V (0.76 V)* or more when fuel is cut during engine decelera-
tion, as shown in the illustration.
*: Voltage when using the OBD II scan tool.

A85380
1.0 to 1.1 mmBase of the
Ground Electrode
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
4 READ VALUE OF HAND-HELD TESTER OR OBD II SCAN TOOL (NUMBER OF
MISFIRE)
(a) Connect the hand-held tester or the OBD II scan tool to the DLC3.
(b) Turn ON the ignition switch. Push the hand-held tester or the OBD II scan tool main switch ON.
(c) Start the engine.
(d) Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / CYL#1 to CYL#4.
(e) Read the number of misfires on the hand-held tester or the OBD II scan tool.
HINT:
When a misfire is not reproduced, be sure to branch below based on the stored DTC.
Result:
High Misfire Rate CylinderProceed to
1 or 2 cylindersA
More than 3 cylindersB
B Go to step 15
A
5 CHECK SPARK PLUG AND SPARK OF MISFIRING CYLINDER
(a) Remove the ignition coil.
(b) Remove the spark plug.
(c) Check the spark plug type.
Recommended spark plug:
DENSO madeSK20R11
NGK madeIFR6A11
(d) Measure the spark plug electrode gap.
Standard: 1.0 to 1.1 mm (0.039 to 0.043 in.)
Maximum: 1.3 mm (0.051 in.)
NOTICE:
If adjusting the gap of a new spark plug, bend only the base
of the ground electrode. Do not touch the tip. Never attempt
to adjust the gap on a used plug.
(e) Check the electrode for carbon deposits.
(f) Perform a spark test.
CAUTION:
Always disconnect each injector connector.
NOTICE:
Do not crank the engine for more than 2 seconds.
(1) Install the spark plug to the ignition coil and connect
the ignition coil connector.
(2) Disconnect the injector connector.
(3) Ground the spark plug.
(4) Check if spark occurs while the engine is being
cranked.
OK: Spark jumps across electrode gap.
OK Go to step 8
NG

S01196S01699
30
20
10
5
3
02040 0.11
0.3
0.2 0.52
60 80 100 -20
(-4) (104) (140) (176)(32) (68) (212)
A81700
Ohmmeter
Acceptable
Temperature C (F)
Resistance kW
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17 READ VALUE OF HAND-HELD TESTER OR OBD II SCAN TOOL (INTAKE AIR
TEMPERATURE AND MASS AIR FLOW RATE)
(a) Connect the hand-held tester or the OBD II scan tool to the DLC3.
(b) Turn the ignition switch ON.
(c) Check the intake air temperature.
(1) On the hand-held tester or the OBD II scan tool, enter the following menus: DIAGNOSIS / EN-
HANCED OBD II / DATA LIST / ALL / INTAKE AIR. Read the values.
Temperature: Equivalent to ambient temperature
(d) Check the air flow rate.
(1) On the hand-held tester or the OBD II scan tool, enter the following menus: DIAGNOSIS / EN-
HANCED OBD II / DATA LIST / ALL / MAF. Read the values.
Standard:
ConditionAir Flow Rate (gm/s)
Ignition switch ON (do not start engine)0
Idling0.5 to 5
Running without load (2,500 rpm)3 to 10
Idling to quickly acceleratingAir flow rate fluctuates
NG REPLACE MASS AIR FLOW METER
OK
18 INSPECT ENGINE COOLANT TEMPERATURE SENSOR (RESISTANCE)
(a) Remove the ECT sensor.
(b) Measure the resistance between the terminals.
Standard:
Tester ConnectionConditionSpecified Condition
1 - 220C (68F)2.32 to 2.59 kW
1 - 280C (176F)0.310 to 0.326 kW
NOTICE:
If checking the ECT sensor in water, be careful not to allow
water to contact the terminals. After the check, dry the sen-
sor.
HINT:
Alternate procedure: Connect an ohmmeter to the installed
ECT sensor and read the resistance. Use an infrared thermom-
eter to measure the engine temperature in the immediate vicin-
ity of the sensor. Compare these values to the resistance/tem-
perature graph. Change the engine temperature (warm up or
allow to cool down) and repeat the test.
NG REPLACE ENGINE COOLANT TEMPERATURE
SENSOR
OK

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INSPECTION PROCEDURE
HINT:
Read freeze frame data using the hand-held tester or the OBD II scan tool. Freeze frame data records the
engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help deter-
mine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was lean
or rich, and other data from the time the malfunction occurred.
1 READ OUTPUT DTC
(a) Clear the DTC (see page 05-38).
(b) Warm up the engine.
(c) Run the engine at 3,000 rpm for 10 seconds or more.
(d) Connect the hand-held tester or the OBD II scan tool to the DLC3.
(e) Turn ON the ignition switch. Push the hand-held tester or the OBD II scan tool main switch ON.
(f) Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
(g) Read the DTC.
Result:
Display (DTC output)Proceed to
Only P0325 is output againA
P0325, P0327 and/or P0328 are output againB
P0325, P0327 and/or P0328 are not output againC
B Go to step 3
C CHECK FOR INTERMITTENT PROBLEMS
(See page 05-9)
A
2 INSPECT KNOCK SENSOR
(a) Check the knock sensor installation.
OK: Torque is 20 NVm (204 kgfVcm, 15 ftVlbf)
NG TIGHTEN SENSOR
OK
REPLACE KNOCK SENSOR

A90299
C1
Camshaft Position Sensor
C7
Crankshaft Position SensorShieldedL Y
1
2 2 1
EEBR G
J7
J/C
AECM
G2+
NE+
NE-
E1 A AG R
BRE9
E9
E9 25
24
1 E9 27 Shielded
Crankshaft Angle
Sensor PlateSignal Rotor on
Intake Camshaft
A
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TYPICAL MALFUNCTION THRESHOLDS
CKP signalNo signal
COMPONENT OPERATING RANGE
CKP signalCKP sensor voltage fluctuates when the crankshaft rotates 34 CKP signals per 1
revolution crankshaft
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:

Read values on the hand-held tester or OBD II scan tool.
(a) Connect the hand-held tester or the OBD II scan tool to the DLC3.
(b) Start the engine and push the hand-held tester or the OBD II scan tool main switch ON.
(c) Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / ENGINE SPD.

The engine speed can be confirmed in DATA LIST using the hand-held tester or OBD II scan tool. If
there are no NE signals from the crankshaft position sensor despite the engine revolving, the engine
speed will be indicated as zero. If voltage output of the crankshaft position sensor is insufficient, the
engine speed will be indicated as lower than the actual rpm.

Read freeze frame data using the hand-held tester or the OBD II scan tool. Freeze frame data records
the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can
help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel
ratio was lean or rich, and other data from the time the malfunction occurred.

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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
HINT:
Hand-held tester only:

The following procedure enables a technician to identify a trouble area if there is a malfunction in front
A/F sensor or rear heated oxygen sensors other than the catalyst converter, or the malfunction that
indicates the actual air-fuel ratio extremely RICH or LEAN.
It is possible the malfunctioning area can be found using the ACTIVE TEST A/F CONTROL operation. The
A/F CONTROL operation can determine if the A/F sensor, heated oxygen sensor or other potential trouble
areas are malfunctioning or not.
(a) Perform the ACTIVE TEST A/F CONTROL operation.
HINT:
The A/F CONTROL operation lowers the injection volume 12.5 % or increases the injection volume 25 %.
(1) Connect the hand-held tester to the DLC3 on the vehicle.
(2) Turn the ignition switch ON.
(3) Warm up the engine by running the engine speed at 2,500 rpm for approximately 90 seconds.
(4) Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / A/F CONTROL.
(5) Perform the A/F CONTROL operation with the engine idle (press the right or left button).
Result:
Heated oxygen sensor reacts in accordance with increase and decrease of injection volume
+25 % " rich output: More than 0.5 V
-12.5 % " lean output: Less than 0.4 V

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INSPECTION PROCEDURE
NOTICE:

When a vehicle is brought into the workshop, leave it as it is. Do not change the vehicle condi-
tion. For example, do not tighten the fuel tank cap.

Do not disassemble the pump module.

A hand-held tester is required to conduct the following diagnostic troubleshooting procedure.
1 CONFIRM DTC AND EVAP PRESSURE
(a) Connect a hand-held tester to the DLC3.
(b) Turn the ignition switch to ON (do not start the engine).
(c) Turn the tester ON.
(d) Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
(e) Read DTCs.
(f) Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / VAPOR
PRESS.
(g) Read the EVAP (Evaporative Emission) pressure displayed on the tester.
Result:
Display (DTC Output)Test ResultsSuspected Trouble AreasProceed To
P0451'
Pressure sensorC
P0452Less than 45 kpa (430 mmHg)

Wire harness/connector (ECM - pressure
sensor)

Pressure sensor

Short in ECM circuit
A
P0453More than 120 kPa (900 mmHg)

Wire harness/connector (ECM - pressure
sensor)

Pressure sensor

Open in ECM circuit
B
B Go to step 4
C Go to EVAP INSPECTION PROCEDURE
(See page 05-317)
A

A85252
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
5 REPLACE PUMP MODULE
(a) Remove the exhaust tail pipe.
(b) Remove the heat insulator under the canister.
(c) Disconnect the hoses and the connector.
(d) Remove the 3 bolts and the pump module with the O-
ring.
(e) Install a new pump module with a new O-ring.
(f) Install the 3 bolts.
(g) Connect the hoses and the connector.
(h) Go to the next step before installing the exhaust tail pipe.
NEXT Go to step 8
6 REPAIR OR REPLACE WIRE HARNESS AND CONNECTOR
HINT:
If the exhaust tail pipe has been removed, go to the next step before reinstalling it.
NEXT Go to step 8
7 REPLACE ECM (see page 10-9)
NEXT Go to step 8
8 CONFIRM DTC (AFTER REPAIR)
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch to ON and turn the tester ON.
(c) Wait for at least 60 seconds.
(d) On the tester, select the following menu items: DIAGNOSIS /ENHANCED OBD II /DTC INFO /PEND-
ING CODES.
HINT:
If no pending DTC is displayed on the tester, the repair has been successfully completed.
NEXT
COMPLETED