display TOYOTA HIGHLANDER 2001 Service Repair Manual
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Page 1883 of 2572
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-249
439 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3 CHECK DTC OUTPUT
(a) Clear the DTC (See page 05-38).
(b) Start the engine, and depress and release the accelerator pedal quickly (fully open and fully close).
(c) Read the DTC.
Result:
Display (DTC output)Proceed to
No DTCA
P2111 and/or P2112B
B REPLACE ECM (See page 10-9)
A
CHECK FOR INTERMITTENT PROBLEMS (See page 05-9)
Page 1890 of 2572
05-256
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
446 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
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 CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P2119)
Display (DTC output)Proceed to
Only P2119 is outputA
P2119 and other codes are outputB
B GO TO RELEVANT DTC CHART (See page
05-48)
A
2 CHECK IF DTC OUTPUT REOCCURS
(a) Clear the DTC (see page 05-38).
(b) Allow the engine to idle for 15 seconds.
(c) Pull the hand brake and shift the gear to D.
(d) Depress the brake pedal securely and the accelerator pedal fully for 5 seconds.
(e) Read the DTC.
HINT:
Actual throttle position (TP) sensor voltage can be confirmed using the hand-held tester [DATA LIST / ALL
/ THROTTLE POS #1].
OK: No DTC is output.
OK NORMAL
NG
REPLACE THROTTLE BODY ASSY
Page 1895 of 2572
A80021
A27
Accelerator Pedal
Position Sensor
EPA
EPA2
VCP2VPA2VPA
5
2
1 3 46
VCPAE5
E5
E5 E5 E5 E5
28
29
27 23 26 22ECM
EPA
EPA2
VCP2 VPA2VCPAVPA
BR
L G
W B
R
FI7052DepressedReleased
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-261
451 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
WIRING DIAGRAM
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.
Hand-held tester:
1 READ VALUE OF HAND-HELD TESTER (ACCEL POS #1 AND ACCEL POS #2)
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch ON.
(c) On the hand-held tester, enter the following menus:
DIAGNOSIS / ENHANCED OBD II / DATA LIST / ETCS
/ ACCEL POS #1 and ACCEL POS #2º and read its value
displayed on the hand-held tester.
Standard:
Accelerator PedalACCEL POS #1ACCEL POS #2
Released0.5 to 1.1 V1.2 to 2.0 V
Depressed2.6 to 4.5 V3.4 to 5.3 V
OK Go to step 5
NG
Page 1897 of 2572
B53781
A67445A92629
A27
Accelerator Pedal
Position Sensor
VPA
EPA
VCPA
VPA2 EPA2 VCP2 Wire Harness Side
E5
ECM VPA
EPAVCPA
VPA2
EPA2VCP2
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-263
453 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
4 REPLACE ACCELERATOR PEDAL ROD ASSY (See page 10-1 1)
GO
5 READ OUTPUT DTC (ACCELERATOR PEDAL POSITION SENSOR DTCS ARE
OUTPUT AGAIN)
(a) Clear the DTC (see page 05-38).
(b) Start the engine.
(c) Run the engine at idle for 15 seconds or more.
(d) Read the DTC.
Result:
Display (DTC Output)Proceed to
P2120, P2122, P2123, P2125, P2127, P2128 and/or P2138 are output againA
No DTC outputB
B SYSTEM OK
A
REPLACE ECM (See page 10-9)
OBD II scan tool (excluding hand-held tester):
1 CHECK WIRE HARNESS (ACCELERATOR PEDAL POSITION SENSOR - ECM)
(a) Disconnect the A27 sensor connector.
(b) Disconnect the E5 ECM connector.
(c) Measure the resistance of the wire harness side connec-
tors.
Standard:
Tester ConnectionSpecified Condition
VPA (A27-6) - VPA (E5-22)
EPA (A27-5) - EPA (E5-28)
VCPA (A27-4) - VCPA (E5-26)
VPA2 (A27-3) - VPA2 (E5-23)
EPA2 (A27-2) - EPA2 (E5-29)
VCP2 (A27-1) - VCP2 (E5-27)
Below 1 W
VPA (A27-6) or VPA (E5-22) - Body ground
EPA (A27-5) or EPA (E5-28) - Body ground
VCPA (A27-4) or VCPA (E5-26) - Body ground
VPA2 (A27-3) or VPA2 (E5-23) - Body ground
EPA2 (A27-2) or EPA2 (E5-29) - Body ground
VCP2 (A27-1) or VCP2 (E5-27) - Body ground
10 kW or higher
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
Page 1898 of 2572
A19521
A53765A92544
A27
Accelerator Pedal
Position Sensor
EPA (-)
VCPA (+)E5
ECM
VCP2 (+) EPA2 (-)
05-264
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
454 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
2 INSPECT ECM (VCPA AND VCP2 VOLTAGE)
(a) Disconnect the A27 sensor connector.
(b) Turn the ignition switch ON.
(c) Measure the voltage of the ECM connector.
Standard:
Tester ConnectionSpecified Condition
VCPA (E5-26) - EPA (E5-28)
VCP2 (E5-27) - EPA2 (E5-29)4.5 to 5.5 V
NG REPLACE ECM (See page 10-9)
OK
3 REPLACE ACCELERATOR PEDAL ROD ASSY (See page 10-1 1)
GO
4 READ OUTPUT DTC (ACCELERATOR PEDAL POSITION SENSOR DTCS ARE
OUTPUT AGAIN)
(a) Clear the DTC (see page 05-38).
(b) Start the engine.
(c) Run the engine at idle for 15 seconds or more.
(d) Read the DTC.
Result:
Display (DTC Output)Proceed to
P2120, P2122, P2123, P2125, P2127, P2128 and/or P2138 are output againA
No DTC outputB
B SYSTEM OK
A
REPLACE ECM (See page 10-9)
Page 1900 of 2572
FI7052DepressedReleased
05-266
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
456 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
WIRING DIAGRAM
Refer to DTC P2120 on page 05-257.
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.
Hand-held tester:
1 READ VALUE OF HAND-HELD TESTER (ACCEL POS #1, ACCEL POS #2)
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch ON.
(c) On the hand-held tester, enter the following menus:
DIAGNOSIS / ENHANCED OBD II / DATA LIST / ETCS
/ ACCEL POS #1 and ACCEL POS #2º and read its value
displayed on the hand-held tester.
Standard:
Accelerator PedalACCEL POS #1ACCEL POS #2
Released0.5 to 1.1 V1.2 to 2.0 V
Depressed2.6 to 4.5 V3.4 to 5.3 V
OK REPLACE ECM (See page 10-9)
NG
Page 1904 of 2572
05-270
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
460 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)DTC No.
DTC Detection ConditionTrouble Area
P2195
Conditions (a) and (b) continue for 2 seconds or more:
(a) A/F sensor voltage is more than 3.8 V
(b) Rear oxygen sensor voltage is 0.15 V or more
(2 trip detection logic)
Open or short in A/F sensor circuit
A/F sensor
A/F sensor heater
EFI relay
Open or short in A/F sensor heater and EFI relay circuits
Air induction system
Fuel pressure
Injector
ECM
P2196
Conditions (a) and (b) continue for 2 seconds or more:
(a) A/F sensor voltage is less than 2.8 V
(b) Rear oxygen sensor voltage is less than 0.85 V
(2 trip detection logic)
Same as DTC No. P2195
HINT:
DTCs P2195 and P2196 indicate a malfunction related to bank 1 of the A/F sensor circuit.
Sensor 1 is the sensor closest to the engine assembly.
After confirming DTC P2195 and P2196, use the hand-held tester or the OBD II scan tool to confirm
A/F sensor output voltage (AFS B1S1) from the ALL menu (to reach the ALL menu: DIAGNOSIS / EN-
HANCED OBD II / DATA LIST / ALL).
The A/F sensor's output voltage and the short-term fuel trim value can be read using the OBD II scan
tool or the hand-held tester.
The ECM controls the voltage of the A1A+ and A1A- terminals of the ECM to a fixed voltage. There-
fore, it is impossible to confirm the A/F sensor output voltage without the OBD II scan tool or the hand-
held tester.
The OBD II scan tool (excluding hand-held tester) displays one fifth of the A/F sensor output voltage
which is displayed on the hand-held tester.
MONITOR DESCRIPTION
Under the air-fuel ratio feedback control, if the voltage output of the A/F sensor indicates RICH or LEAN for
more than a certain period of time, the ECM concludes that there is a fault in the A/F sensor system. The
ECM will turn on the MIL and will set a DTC.
Example:
If the A/F sensor voltage output is less than 2.8 V (very RICH) for 10 seconds even though voltage output
of the heated oxygen sensor output voltage is less than 0.85 V, the ECM sets DTC P2196 or DTC P2198.
If the heated oxygen sensor output voltage is 0.15 V or more but the A/F sensor voltage output is more than
3.8 V (very LEAN) for 10 seconds, DTC P2195 is set.
MONITOR STRATEGY
Related DTCsP2195: A/F Sensor Signal (Bank 1) Stuck Lean
P2196: A/F Sensor Signal (Bank 1) Stuck Rich
Required sensors / components (Main)A/F sensor
Required sensors / components (Related)Rear HO2S
Frequency of operationContinuous
Duration10 sec.
MIL operation2 driving cycles
Sequence of operationNone
Page 1908 of 2572
+25 %
-12.5 %
More than 3.35 V
Less than 3.0 V
Case 1
Case 2
Case 3
Case 4
Output voltage of A/F sensor
(sensor 1)
Injection volume
Output voltage
Output voltage of heated oxygen
sensor (sensor 2)Main suspect
trouble area
OK
+25 %
-12.5 %
More than 3.35 V
Less than 3.0V
Injection volume
Output voltage
+25 %
-12.5 %
More than 0.55 V
Less than 0.4V
Injection volume
Output voltage
A/F sensor
(A/F sensor, heater, A/F sen-
sor circuit)
+25 %
-12.5 %
More than 0.55 V
Less than 0.4V
Injection volume
Output voltage
+25 %
-12.5 %
Injection volume
Output voltage
NG
+25 %
-12.5 %
Injection volume
Output voltage
NG
+25 %
-12.5 %
Injection volume
Output voltage
NG
+25 %
-12.5 %
Injection volume
Output voltage
NGExtremely rich or lean actual
air-fuel ratio
(Injector, fuel pressure, gas
leakage in exhaust system,
etc.) OK
OK
OK
Almost
No reaction
Almost
No reaction
Almost
No reaction Almost
No reaction
'
Heated oxygen sensor
(heated oxygen sensor,
heater, heated oxygen sensor
circuit) 05-274
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
464 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
NOTICE:
The A/F sensor output has a few seconds of delay and the heated oxygen sensor output has about
20 seconds of delay.
The following A/F CONTROL procedure enables a technician to check and graph the voltage outputs of both
the A/F sensor and the heated oxygen sensor.
For displaying the graph, enter ºACTIVE TEST / A/F CONTROL / USER DATAº, select ºAFS B1S1 and O2S
B1S2º by pressing ºYESº and push ºENTERº. Then press ºF4º.
HINT:
If DTC P2195 or P2196 is displayed, check bank 1 sensor 1 circuit.
A low A/F sensor voltage could be caused by a RICH air-fuel mixture. Check for conditions that would
cause the engine to run with a RICH air-fuel mixture.
A high A/F sensor voltage could be caused by a LEAN air-fuel mixture. Check for conditions that would
cause the engine to run with a LEAN air-fuel mixture.
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.
Page 1909 of 2572
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-275
465 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
1 CHECK OTHER DTC OUTPUT (IN ADDITION TO A/F SENSOR DTC)
(a) Read the DTC using the hand-held tester or the OBD II scan tool.
Result:
DisplayProceed to
A/F sensor circuit DTC are outputA
A/F sensor circuit DTC and other codes are outputB
HINT:
If any other codes besides A/F sensor DTC are output, perform the troubleshooting for those DTCs first.
B GO TO RELEVANT DTC CHART
(See page 05-48)
A
2 READ VALUE OF HAND-HELD TESTER OR OBD II SCAN TOOL (OUTPUT VOLT-
AGE OF A/F SENSOR)
(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:
On the hand-held tester, enter the following menus: DIAGNOSIS / ENHANCED OBD II / SNAPSHOT
/ MANUAL SNAPSHOT / USER DATA. Read the values.
(e) Select ºAFS B1S1 / 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) Run the engine at approximately 2,500 rpm. Do not suddenly change the rpm.
(3) Raise the engine 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 during engine deceleration when fuel
is cut as shown in the illustration.
*: Voltage when using the OBD II scan tool.
Page 1914 of 2572
05-280
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
470 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
11 READ OUTPUT DTC
(a) Read the DTC using the hand-held tester or the OBD II scan tool.
Result:
DisplayProceed to
A/F sensor circuit DTC are not outputA
A/F sensor circuit DTC are outputB
B REPLACE ECM (See page 10-9) AND PERFORM
CONFIRMATION DRIVING PATTERN
A
12 CONFIRM IF VEHICLE HAS RUN OUT OF FUEL IN PAST
OK: Vehicle has run out of fuel in past.
NO CHECK FOR INTERMITTENT PROBLEMS
(See page 05-9)
YES
DTC IS CAUSED BY RUNNING OUT OF FUEL
13 PERFORM CONFIRMATION DRIVING PATTERN
HINT:
Clear all DTCs prior to performing the confirmation driving pattern.
GO
14 GO TO RELEVANT DTC CHART (A/F SENSOR DTC OUTPUT AGAIN)
(a) Read the DTC using the hand-held tester or the OBD II scan tool.
Result:
DisplayProceed to
A/F sensor circuit DTC are outputA
A/F sensor circuit DTC are not outputB
B Go to step 18
A
15 REPLACE AIR FUEL RATIO SENSOR
GO
16 PERFORM CONFIRMATION DRIVING PATTERN
HINT:
Clear all DTCs prior to performing the confirmation driving pattern.
GO