display TOYOTA HIGHLANDER 2001 Service Repair Manual
[x] Cancel search | Manufacturer: TOYOTA, Model Year: 2001, Model line: HIGHLANDER, Model: TOYOTA HIGHLANDER 2001Pages: 2572, PDF Size: 34.8 MB
Page 1682 of 2572
A76903
E2 (-)VC (+)
E7
ECM
05-108
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
298 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3 INSPECT ECM (VC VOLTAGE)
(a) Disconnect the T13 throttle position sensor connector.
(b) Turn the ignition switch ON.
(c) Measure the voltage of the ECM connector.
Standard:
Tester ConnectionSpecified Condition
E7-18 (VC) - E7-28 (E2)4.5 to 5.5 V
NG REPLACE ECM (See page 10-9)
OK
4 REPLACE THROTTLE BODY ASSY (See page 10-6)
GO
5 READ OUTPUT DTC (THROTTLE 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
P0120, P0122, P0123, P0220, P0222, P0223 and/or P2135 are output againA
No DTC outputB
B SYSTEM OK
A
REPLACE ECM (See page 10-9)
Page 1684 of 2572
05-1 10
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
300 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
4 READ OUTPUT DTC (THROTTLE 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
P0120, P0122, P0123, P0220, P0222, P0223 and/or P2135 are output againA
No DTC outputB
B SYSTEM OK
A
REPLACE ECM (See page 10-9)
Page 1688 of 2572
05-1 14
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
304 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
HINT:
If DTCs P0115, P0116, P0117, P0118 and P0125 are output simultaneously, engine coolant tempera-
ture sensor circuit may be open or short. Perform the troubleshooting of DTC P0115, P0117 or P0118
first.
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.
1 CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0125)
(a) Read the DTC using the hand-held tester or the OBD II scan tool.
Result:
Display (DTC Output)Proceed to
Only P0125 are outputA
P0125 and other DTCs are outputB
HINT:
If any other codes besides P0125 is output, perform the troubleshooting for those codes first.
B GO TO RELEVANT DTC CHART
(See page 05-48)
A
2 INSPECT THERMOSTAT (See page 16-2)
(a) Check the valve opening temperature of the thermostat.
OK:
Valve opening temperature: 80 to 84C (176 to 183F)
HINT:
Also check that the valve is completely closed under opening temperature as above.
NG REPLACE THERMOSTAT (See page 16-1 1)
OK
3 CHECK COOLING SYSTEM
(a) Check the cooling system for excessive cooling, such as abnormal radiator fan operation, modified
cooling system and other defects.
OK:
There is no modification of cooling system.
NG REPAIR OR REPLACE COOLING SYSTEM
OK
REPLACE ENGINE COOLANT TEMPERATURE SENSOR
Page 1699 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)
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-125
315 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
Result:
A/F sensor reacts in accordance with increase and decrease of injection volume:
+25 % " rich output: Less than 3.0 V
-12.5 % " lean output: More than 3.35 V
Heated oxygen sensor reacts in accordance with increase and decrease of injection volume:
+25 % " rich output: More than 0.55 V
-12.5 % " lean output: Less than 0.4 V
NOTICE:
The A/F sensor output has a few seconds of delay and the heated oxygen sensor output has about
20 seconds of delay at maximum.
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:
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.
Page 1700 of 2572
A81695
E8
ECM
O1B-
OX1B
HT1B
05-126
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
316 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
1 CHECK OTHER DTC OUTPUT
(a) Read the DTC using the hand-held tester or the OBD II scan tool.
Result:
Display (DTC Output)Proceed to
P0138 is outputA
P0137 is outputB
P0136 is outputC
HINT:
If any other codes besides P0136, P0137 and/or P138 are output, perform the troubleshooting for those
codes first.
B Go to step 9
C Go to step 6
A
2 READ VALUE OF HAND-HELD TESTER OR OBD II SCAN TOOL (OUTPUT
VOLTAGE OF HEATED OXYGEN SENSOR)
(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) Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / O2S B1S2.
(d) Run the engine at idle.
(e) Read the output voltage of the heated oxygen sensor during idling.
Heated oxygen sensor output voltageProceed to
More than 1.2 VA
Less than 1.0 VB
B READ OUTPUT DTC
A
3 CHECK WIRE HARNESS (CHECK FOR SHORT)
(a) Turn the ignition switch OFF and wait for 5 minutes.
(b) Disconnect the E8 ECM connector.
(c) Measure the resistance of the wire harness side connec-
tors.
Standard:
Tester ConnectionSpecified Condition
E8-21 (HT1B) - E8-29 (OX1B)10 kW or higher
E8-21 (HT1B) - E8-2 (O1B-)10 kW or higher
OK REPLACE ECM (See page 10-9)
NG
Page 1701 of 2572
A80018
H10
Heated Oxygen Sensor
E1 OX
+B
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-127
317 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
4 INSPECT HEATED OXYGEN SENSOR (CHECK FOR SHORT)
(a) Disconnect the H10 heated oxygen sensor connector.
(b) Measure the resistance of the sensor side connectors.
Standard:
Tester ConnectionSpecified Condition
H10-1 (+B) - H10-3 (E1)10 kW or higher
H10-1 (+B) - H10-4 (OX)10 kW or higher
OK REPAIR OR REPLACE HARNESS AND
CONNECTOR
NG
REPLACE HEATED OXYGEN SENSOR
5 READ OUTPUT DTC (CHECK MODE)
(a) Change the ECM to check mode with the hand-held tester.
Enter the following menus: DIAGNOSIS / ENHANCED OBD II / CHECK MODE.
(b) Warm up the engine and drive the vehicle at over 25 mph (40 km/h) for an accumulated total of 10
minutes.
HINT:
The 10 minutes of driving should be driven in one instance, but it is not necessary to maintain a speed of
25 mph (40 km/h) for 10 minutes consecutively.
(c) Read the DTC.
Result:
Display (DTC output)Proceed to
P0136 is outputA
No DTCB
B CHECK FOR INTERMITTENT PROBLEMS
(See page 05-9)
A
REPLACE HEATED OXYGEN SENSOR
6 READ VALUE OF HAND-HELD TESTER OR OBD II SCAN TOOL (OUTPUT
VOLTAGE OF HEATED OXYGEN SENSOR)
(a) After warming up the engine, run the engine at 2,500 rpm for 3 minutes.
(b) Read the output voltage of the heated oxygen sensor when the engine rpm is suddenly increased.
HINT:
Quickly accelerate the engine to 4,000 rpm 3 times by using the accelerator pedal.
Heated oxygen sensor output voltage: Alternates 0.4 V or less and 0.5 V or more.
OK Go to step 10
NG
Page 1704 of 2572
05-130
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
320 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
REPLACE HEATED OXYGEN SENSOR
10 PERFORM CONFIRMATION DRIVING PATTERN
HINT:
Clear all DTCs prior to performing the confirmation driving pattern.
GO
11 READ OUTPUT DTC (DTC P0136 IS OUTPUT AGAIN)
(a) Read the DTC using the hand-held tester or the OBD II scan tool.
Result:
Display (DTC Output)Proceed to
P0136 is not output againA
P0136 is output againB
A CHECK FOR INTERMITTENT PROBLEMS
B
12 REPLACE HEATED OXYGEN SENSOR
GO
13 PERFORM CONFIRMATION DRIVING PATTERN
HINT:
Clear all DTCs prior to performing the confirmation driving pattern.
GO
14 READ OUTPUT DTC (DTC P0136 IS OUTPUT AGAIN)
(a) Read the DTC using the hand-held tester or the OBD II scan tool.
Result:
Display (DTC Output)Proceed to
P0136 is not output againA
P0136 is output againB
A REPAIR COMPLETED
B
Page 1709 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)
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-135
325 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 at maximum.
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:
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.
A high A/F sensor voltage could be caused by a RICH air fuel mixture. Check the conditions that might
cause the engine to run with a RICH air fuel mixture.
A low A/F sensor voltage could be caused by a LEAN air fuel mixture. Check the conditions that might
cause the engine to run with a LEAN air fuel mixture.
Page 1717 of 2572
A79199
Vehicle Speed
(60 to 120 km/h) 38 to 75 mph
Idling
IG SW OFF
3 to 5 minutes
Time 2 minutes
(a), (b), (c)(e)
(d)
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-143
333 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
14 PERFORM CONFIRMATION DRIVING PATTERN
(a) Clear the DTCs.
(1) Disconnect the battery cable or remove the EFI NO. 1 and ETCS fuses for 60 seconds or more.
(b) Connect the hand-held tester to the DLC3.
(c) Switch the hand-held tester from the normal mode to the check mode (see page 05-40).
(d) Start the engine and warm it up with all the accessory switches OFF.
(e) Drive the vehicle at 38 to 75 mph (60 to 120 km/h) and engine speed at 1,400 to 3,200 rpm for 3 to
5 minutes.
HINT:
If a malfunction exists, the MIL will be illuminated during step (e).
NOTICE:
If the conditions in this test are not strictly followed, detecting a malfunction may be difficult. If you
do not have a hand-held tester, turn the ignition switch OFF after performing steps (d) to (e), and then
do step (e) again.
GO
15 READ OUTPUT DTC (DTC P0171, P0172 ARE OUTPUT AGAIN)
(a) Read the DTC using the hand-held tester or the OBD II scan tool.
Result:
Display (DTC Output)Proceed to
DTC P0171, P0172 are not output againA
DTC P0171, P0172 are output againB
B REPLACE ECM (See page 10-9) AND PERFORM
CONFIRMATION DRIVING PATTERN
(Refer to step 14)
A
Page 1718 of 2572
05-144
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
334 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
16 CONFIRM IF 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 (DTCS P0171, P0172)
17 PERFORM CONFIRMATION DRIVING PATTERN
HINT:
Clear all DTCs prior to performing the confirmation driving pattern (refer to step 14).
GO
18 READ OUTPUT DTC (DTC P0171, P0172 ARE OUTPUT AGAIN)
(a) Read the DTC using the hand-held tester or the OBD II scan tool.
Result:
Display (DTC Output)Proceed to
DTC P0171, P0172 are output againA
DTC P0171, P0172 are not output againB
B Go to step 22
A
19 REPLACE AIR FUEL RATIO SENSOR
GO
20 PERFORM CONFIRMATION DRIVING PATTERN
HINT:
Clear all DTCs prior to performing the confirmation driving pattern (refer to step 14).
GO