Inspection Procedure

HINT:

Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P3190, P3191 AND/OR P3193)

Connect the intelligent tester to the DLC3.
Turn the power switch ON (IG).
Turn the intelligent tester ON.
Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.

Read the DTCs.

Result

RESULT REFERENCE

Display (DTC output)	Proceed to
P3190, P3191 and/or P3193	A
P3190, P3191 and/or P3193, and other DTCs	B

HINT:

If any other codes besides P3190, P3191 and/or P3193 are output, perform troubleshooting for those DTCs first.

B: Go to DTC CHART

A: Go to Next Step

CHECK SHORTAGE OF FUEL
NG: REFILL FUEL

OK: Go to Next Step
CHECK AIR INDUCTION SYSTEM
OK: The air induction system has no leakage and blockages.

NG: REPAIR OR REPLACE AIR INDUCTION SYSTEM

OK: Go to Next Step
CHECK FOR UNUSUAL NOISE OR VIBRATION WHEN STARTING ENGINE OR REVVING UP
OK: Unusual noise and vibration do not occur.

NG: REPAIR OR REPLACE

OK: Go to Next Step
CHECK FUEL PRESSURE
OK: Fuel pressure: 304 to 343 kPa (3.1 to 3.5 kgf/cm ² , 44 to 50 psi)

NG: CHECK AND REPAIR FUEL SYSTEM

OK: Go to Next Step

INSPECT MASS AIR FLOW METER

Remove the mass air flow meter.

Inspect output voltage.

Apply battery voltage across terminals +B and E2G.
Connect the positive (+) tester probe to terminal VG, and negative (-) tester probe to terminal E2G.

Blow air into the mass air flow meter, and check that the voltage fluctuates.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
3(VG) - 2(E2G)	Sensor output voltage fluctuates between 0.3 V and 4.8 V

Inspect resistance.

Measure the resistance between the terminals of the mass air flow meter.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
4 (THA) - 5 (E2)	13.6 to 18.4 kΩ at -20°C (-4°F)
4 (THA) - 5 (E2)	2.21 to 2.69 kΩ at 20°C (68°F)
4 (THA) - 5 (E2)	0.49 to 0.67 kΩ at 60°C (140°F)

Reinstall the mass air flow meter.

NG: REPLACE MASS AIR FLOW METER

Fig 1: Blowing Air Into Mass Air Flow Meter And Check Voltage Fluctuates

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

INSPECT ENGINE COOLANT TEMPERATURE SENSOR

Remove the engine coolant temperature sensor.

Measure the resistance between the terminals of the engine coolant temperature sensor.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
1 - 2	2 to 3 kΩ at 20°C (68°F)
1 - 2	0.2 to 0.4 kΩ at 80°C (176°F)

NOTE: When checking the engine coolant temperature sensor in water, be careful not to allow water to contact the terminals. After checking, dry the sensor.

HINT:

Alternative procedure: Connect an ohmmeter to the installed engine coolant temperature sensor and read the resistance.

Use an infrared thermometer to measure the engine temperature in the immediate vicinity of the sensor. Compare these values to the resistance/temperature graph. Change the engine temperature (warm up or allow to cool down) and repeat the test.

Reinstall the engine coolant temperature sensor.

NG: REPLACE ENGINE COOLANT TEMPERATURE SENSOR

Fig 2: Engine Coolant Temperature Sensor Resistance Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step

INSPECT CRANKSHAFT POSITION SENSOR

Disconnect the C7 crankshaft position sensor connector.

Measure the resistance between the terminals of the crankshaft position sensor connector.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
1 - 2	985 to 1,600 Ω at cold
1 - 2	1,265 to 1,890 Ω at hot

Reconnect the crankshaft position sensor connector.

Fig 3: Identifying C7 Crankshaft Position Sensor Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NOTE: Terms "cold" and "hot" refer to the temperature of the sensor. "Cold" means approximately -10 to 50°C (14 to 122°F). "Hot" means approximately 50 to 100°C(122 to 212°F).

NG: REPLACE CRANKSHAFT POSITION SENSOR

OK: Go to Next Step

INSPECT CAMSHAFT POSITION SENSOR

Disconnect the C1 camshaft position sensor connector.

Measure the resistance between the terminals of camshaft position sensor connector.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
1 - 2	1,630 to 2,740 Ω at cold
1 - 2	2,065 to 3,225 Ω at hot

Reconnect the camshaft position sensor connector.
NOTE: Terms "cold" and "hot" refer to the temperature of the sensor. "Cold" means approximately -10 to 50°C (14 to 122°F). "Hot" means approximately 50 to 100°C (122 to 212°F).

NG: REPLACE CAMSHAFT POSITION SENSOR

Fig 4: Identifying C1 Camshaft Position Sensor Connector

OK: Go to Next Step

INSPECT THROTTLE CONTROL MOTOR

Disconnect the throttle control motor connector.

Using an ohmmeter, measure the motor resistance between terminals 1 (M-) and 2 (M+).

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
1 - 2	0.3 to 100 Ω at 20°C (68°F)

NG: REPLACE THROTTLE CONTROL MOTOR

Fig 5: Identifying T2 Throttle Control Motor Connector

OK: Go to Next Step

INSPECT THROTTLE POSITION SENSOR

Disconnect the throttle position sensor connector.

Measure the resistance between the terminals of the throttle position sensor.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
1(VC)-4(E2)	1.2 to 3.2 kΩ at 20°C (68°F)
2(VTA1)-4(E2)	1.8 to 10.5 kΩ at 20°C (68°F)
3(VTA2)-4(E2)	1.8 to 10.5 kΩ at 20°C (68°F)

NG: REPLACE THROTTLE POSITION SENSOR

Fig 6: Identifying T3 Throttle Position Sensor Connector

OK: REPLACE ECM