DESCRIPTION
The stop light switch assembly is part of a duplex system that transmits two signals: STP and ST1-. These two signals are used by the ECM to monitor whether or not the brake system is working properly. This DTC indicates that the stop light switch assembly is remaining on. When the stop light switch assembly remains on during "STOP and GO" driving, the ECM interprets this as a fault in the stop light switch assembly. The ECM will illuminate the MIL and store this DTC.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
|---|---|---|---|---|---|
| P0724 | Brake Switch "B" Circuit High | The stop light switch assembly remains on even when the vehicle repeats 5 cycles of STOP (less than 3 km/h [1.86 mph]) and GO (30 km/h [18.65 mph] or more) (2 trip detection logic). | Short in stop light switch signal circuit Stop light switch assembly ECM | Comes on | DTC stored |
MONITOR DESCRIPTION
This DTC indicates that the stop light switch assembly is remaining on. When the stop light switch assembly remains on during "STOP and GO" driving, the ECM interprets this as a malfunction of the stop light switch assembly, illuminates the MIL and stores this DTC. The vehicle must STOP (less than 3 km/h [1.86 mph]) and GO (30 km/h [18.65 mph] or more) 5 times during 2 driving cycles, in order to detect a malfunction.
P1603
After starting the engine, this DTC is stored when the engine stops without the ignition switch being operated.
Using the Techstream, the conditions present when the DTC was stored can be confirmed by referring to the freeze frame data. Freeze frame data records engine conditions when a malfunction occurs. This information can be useful when troubleshooting.
It is necessary to check if the vehicle has run out of fuel before performing troubleshooting, as this DTC is also stored when the engine stalls due to running out of fuel.
P1605
This DTC is stored if the engine speed drops below the set speed.
Using the Techstream, the conditions present when the DTC was stored can be confirmed by referring to the freeze frame data. Freeze frame data records engine conditions when a malfunction occurs. This information can be useful when troubleshooting.
It is necessary to check if the vehicle ran out of fuel before performing troubleshooting, as this DTC is also stored when idling is unstable due to running out of fuel.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
|---|---|---|---|---|---|
| P1603 | Engine Stall History | After monitoring for startability problems (P1604) finishes and 5 seconds or more have elapsed after starting the engine, with the engine running, the engine stops (the engine speed drops to 200 RPM or less) without the ignition switch being operated for 0.5 seconds or more (1 trip detection logic). | Air leak in intake system Purge VSV Brake booster assembly Mass air flow meter sub-assembly Engine coolant temperature sensor Power supply circuit (purge VSV, air fuel ratio sensor, fuel injector assembly, ignition coil assembly) Fuel pump Fuel pump control circuit Fuel line PCV valve and hose Camshaft timing oil control valve assembly Knock control sensor Ignition system Thermostat Air conditioning system Power steering system Electrical load signal system Charging system A/T system Park/Neutral position switch assembly ECM Immobilizer system Wire harness or connector | Does not come on | DTC stored |
| P1605 | Rough Idling | After 5 seconds or more have elapsed after starting the engine, with the engine running, the engine speed drops to 400 RPM or less (1 trip detection logic). | Air leak in intake system Purge VSV Brake booster assembly Mass air flow meter sub-assembly Engine coolant temperature sensor Power supply circuit (purge VSV, air fuel ratio sensor, fuel injector assembly, ignition coil assembly) Fuel pump Fuel pump control circuit Fuel line PCV valve and hose Camshaft timing oil control valve assembly Knock control sensor Ignition system Thermostat Air conditioning system Power steering system Electrical load signal system Charging system A/T system Park/Neutral position switch assembly ECM Wire harness or connector | Does not come on | DTC stored |
This DTC is stored when the engine does not start even though the STA signal is input or when the engine takes a long time to start, and when the engine speed is low or the engine stalls just after the engine starts.
Using the Techstream, the conditions present when the DTC was stored can be confirmed by referring to the freeze frame data. Freeze frame data records engine conditions when a malfunction occurs. This information can be useful when troubleshooting.
It is necessary to check if the vehicle ran out of fuel before performing troubleshooting, as this DTC is also stored when there is engine starting trouble due to running out of fuel.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
|---|---|---|---|---|---|
| P1604 | Startability Malfunction | Either of the following conditions is met: The engine speed is below 500 RPM with the STA signal on for a certain amount of time (refer to the illustration below) (1 trip detection logic). After the engine starts (engine speed is 500 RPM or more), the engine speed drops to 200 RPM or less within approximately 2 seconds (1 trip detection logic). | Engine assembly (excess friction, compression loss) Starter assembly Crankshaft position sensor Camshaft position sensor Engine coolant temperature sensor Fuel pump Fuel pump control system Fuel line (fuel filter, pipes and hoses) Fuel injector assembly Throttle body with motor assembly Fuel pressure regulator Battery Drive plate and ring gear sub-assembly Spark plug Ignition coil assembly circuit Intake system Camshaft timing oil control valve assembly Mass air flow meter sub-assembly Air fuel ratio sensor Valve timing Fuel Purge VSV Intake valve Immobilizer system ECM | Does not come on | DTC stored |
Scheme 253
The ECM continuously monitors its main and sub CPUs. This self-check ensures that the ECM is functioning properly. If outputs from the CPUs are different and deviate from the standard, the ECM will illuminate the MIL and store this DTC.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
|---|---|---|---|---|---|
| P1607 | Cruise Control Input Processor | ECM CPUs malfunction (1 trip detection logic). | ECM | Comes on | DTC stored |
The Tumble Control Valve (TCV) is built into the intake manifold. The intake air control valve actuator (for tumble control valve) is composed of a position sensor and a DC motor. The DC motor opens and closes the tumble control valve in response to signals from the ECM. The position sensor detects the opening angle of the tumble control valve.
When the tumble control valve is closed, the intake air tumble flow intensifies and negative pressure is generated between the tumble control valve and intake valve which atomizes the fuel. Combustion is enhanced and exhaust gas emissions are reduced at low temperatures.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
|---|---|---|---|---|---|
| P2004 | Intake Manifold Runner Control Stuck Open (Bank 1) | The tumble control valve opening angle is 17 deg. or more after requesting the tumble control valve to fully close (2 trip detection logic). | Open or short in intake air control valve actuator (for tumble control valve) circuit Intake air control valve actuator (for tumble control valve) Intake manifold ECM | Comes on | DTC stored |
| P2006 | Intake Manifold Runner Control Stuck Closed (Bank 1) | The tumble control valve opening angle is less than 35 deg. after requesting the tumble control valve to fully open (2 trip detection logic). | Open or short in intake air control valve actuator (for tumble control valve) circuit Intake air control valve actuator (for tumble control valve) Intake manifold ECM | Comes on | DTC stored |
HINT
When P2004 and/or P2006 is output, use the Techstream to confirm Intake Air Control Position while performing Control the IAC Duty Ratio of the Active Test.
| Control the IAC Duty Ratio Operation | Intake Air Control Position |
|---|---|
| 100% | Approximately 70 deg. |
| 0% | Approximately 70 deg. |
| 100% | Approximately 2 deg. |
REFERENCE (NORMAL CONDITION: WHEN ENGINE WARMED UP)
When the ECM has requested a tumble control valve close operation but the actual tumble control valve opening angle is 17 deg. or more for 10 seconds, DTC P2004 is stored. When the ECM has requested a tumble control valve open operation but the actual tumble control valve opening angle is less than 35 deg. for 10 seconds, DTC P2006 is stored.
The ECM activates the intake air control valve actuator (for tumble control valve), which opens and closes the Tumble Control Valve (TCV). The ECM activates the DC motor based on engine speed, coolant temperature, intake air temperature and other conditions.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
|---|---|---|---|---|---|
| P2009 | Intake Manifold Runner Control Circuit Low (Bank 1) | Both of the following conditions are met for 1 second (1 trip detection logic). (a) The output duty of the intake air control valve actuator is 34% or higher. (b) The current of the intake air control valve actuator is less than 0.35 A. | Open or short in intake air control valve actuator (for tumble control valve) circuit Intake air control valve actuator (for tumble control valve) Intake manifold ECM | Comes on | DTC stored |
| P2010 | Intake Manifold Runner Control Circuit High (Bank 1) | Either of the following conditions continues for 6 times or more (1 trip detection logic). (a) The motor drive IC has overcurrent. (b) The motor drive IC overheats. | Open or short in intake air control valve actuator (for tumble control valve) circuit Intake air control valve actuator (for tumble control valve) Intake manifold ECM | Comes on | DTC stored |
When the voltage of the intake air control valve actuator deviates from the standard range, the ECM determines that a malfunction has occurred and stores a DTC.
The Tumble Control Valve (TCV) position sensor is a non-contact type sensor.
The position sensor measures the opening angle of the tumble control valve. The sensor is reliable and accurate, as it is electrically controlled by Hall-effect elements.
Scheme 254
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
|---|---|---|---|---|---|
| P2014 | Intake Manifold Runner Position Sensor / Switch Circuit (Bank 1) | The tumble control valve position sensor output voltage flutters up and down beyond the normal operating range (less than 0.2 V, or higher than 4.8 V) for more than 0.5 seconds (open or short) (1 trip detection logic). | Open or short in tumble control valve position sensor circuit Tumble control valve position sensor (built into intake air control valve actuator) ECM | Comes on | DTC stored |
| P2016 | Intake Manifold Runner Position Sensor / Switch Circuit Low (Bank 1) | The tumble control valve position sensor output voltage is less than 0.2 V for more than 0.5 seconds (short) (1 trip detection logic). | Open or short in tumble control valve position sensor circuit Tumble control valve position sensor (built into intake air control valve actuator) ECM | Comes on | DTC stored |
| P2017 | Intake Manifold Runner Position Sensor / Switch Circuit High (Bank 1) | The tumble control valve position sensor output voltage is higher than 4.8 V for more than 0.5 seconds (open) (1 trip detection logic). | Open or short in tumble control valve position sensor circuit Tumble control valve position sensor (built into intake air control valve actuator) ECM | Comes on | DTC stored |
HINT
When DTC P2014, P2016 or P2017 is output, use the Techstream to confirm the IAC Sensor Voltage (tumble control valve position sensor output voltage). Enter the following menus: Powertrain / Engine and ECT / Data List / Gas Intake Control / IAC Sensor Voltage.
| IAC Sensor Voltage | Malfunction |
|---|---|
| 0.2 V or less | IAC1 circuit shorted VCIA circuit open |
| 4.8 V or higher | VCIA and IAC1 circuits shorted IAC1 circuit open EIA1 circuit open |
The ECM IAC1 terminal voltage increases in correlation with the opening angle of the tumble control valve. When the tumble control valve is fully closed, approximately 0.94 V is applied to the IAC1 terminal. When the tumble control valve is fully open, approximately 3.39 V is applied to the IAC1 terminal.
When the output voltage of the IAC1 terminal deviates from the standard range, the ECM determines that a malfunction has occurred in the position sensor and stores a DTC.
The throttle actuator is operated by the ECM and opens and closes the throttle valve using gears.
The opening angle of the throttle valve is detected by the throttle position sensor, which is mounted on the throttle body with motor assembly. The throttle position sensor provides feedback to the ECM. This feedback allows the ECM to appropriately control the throttle actuator and monitor the throttle opening angle as the ECM responds to driver inputs.
HINT
This Electronic Throttle Control System (ETCS) does not use a throttle cable.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
|---|---|---|---|---|---|
| P2102 | Throttle Actuator Control Motor Circuit Low | Both of the following conditions are met for 2.0 seconds (1 trip detection logic): (a) The throttle actuator drive duty cycle is 80% or higher. (b) The throttle actuator current is less than 0.5 A. | Open in throttle actuator circuit Throttle actuator ECM | Comes on | DTC stored |
| P2103 | Throttle Actuator Control Motor Circuit High | Either of the following conditions is met (1 trip detection logic): A motor driver IC high current limiter monitor input failure. A motor driver IC high current inhibit signal on. | Short in throttle actuator circuit Throttle actuator Throttle valve Throttle body with motor assembly ECM | Comes on | DTC stored |
The ECM monitors the electrical current through the electronic actuator, and detects malfunctions and open circuits in the throttle actuator based on this value. If the current is outside the standard range, the ECM determines that there is a malfunction in the throttle actuator. In addition, if the throttle valve does not function properly (for example, stuck on), the ECM determines that there is a malfunction. The ECM then illuminates the MIL and stores a DTC.
The idle speed is controlled by the Electronic Throttle Control System (ETCS). The ETCS is comprised of a throttle actuator, which operates the throttle valve, and a throttle position sensor, which detects the opening amount of the throttle valve. The ECM controls the throttle actuator to adjust the throttle valve opening amount so that the idle speed is maintained at the target idle speed.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
|---|---|---|---|---|---|
| P2109 | Throttle / Pedal Position Sensor "A" Minimum Stop Performance | The ISC learned value is approximately 3 times larger than normal even though the actual intake air amount during idle is within the normal range (up to 1.5 times the normal amount) (5 trip detection logic). | Throttle body with motor assembly | Does not come on | DTC stored |
HINT
- The ISC learned value is the calculated intake air amount corresponding to the throttle opening amount necessary to maintain the idling speed.
- This malfunction is only detected once per trip. After it has been detected once, the system will not monitor for the malfunction for the rest of the trip.
- The system uses the throttle body with motor assembly and mass air flow meter sub-assembly to detect this malfunction.
If there are deposits in the throttle valve, a decrease in the ISC flow rate may cause engine stall or unstable idling. Therefore, the necessary ISC flow rate for idling is maintained using the ISC learned value and feedback. The ECM stores this DTC if the ISC learned value approaches its limit. The ECM begins monitoring for the DTC detection conditions when the following preconditions are met
1) The mass air flow meter sub-assembly is normal.
2) Atmospheric pressure is 85 kPa(abs) [637.6 mmHg(abs)] or higher.
3) The vehicle has been driven at a speed of 30 km/h (18.7 mph) or more at least once.
4) The engine coolant temperature is 45°C (113°F) or less at engine start, the engine is warmed up and conditions for ISC learning are met, or the ignition switch has been turned to ON (including when the engine is running) for 1 hour or more, the engine is warmed up and conditions for ISC learning are met.
The throttle actuator is operated by the ECM, and opens and closes the throttle valve using gears. The opening angle of the throttle valve is detected by the throttle position sensor, which is mounted on the throttle body with motor assembly. The throttle position sensor provides feedback to the ECM. This feedback allows the ECM to appropriately control the throttle actuator and monitor the throttle opening angle as the ECM responds to driver inputs.
HINT
This Electronic Throttle Control System (ETCS) does not use a throttle cable.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
|---|---|---|---|---|---|
| P2111 | Throttle Actuator Control System - Stuck Open | The ECM signals the throttle actuator to close, but the actuator is stuck (1 trip detection logic). | Throttle actuator Throttle body with motor assembly Throttle valve Wire harness or connector ECM | Comes on | DTC stored |
| P2112 | Throttle Actuator Control System - Stuck Closed | The ECM signals the throttle actuator to open, but the actuator is stuck (1 trip detection logic). | Throttle actuator Throttle body with motor assembly Throttle valve Wire harness or connector ECM | Comes on | DTC stored |
The ECM determines that there is a malfunction in the ETCS when the throttle valve remains at a fixed angle despite a high drive current from the ECM. The ECM then illuminates the MIL and stores a DTC.