DESCRIPTION
The circuit description can be found in the EVAP (Evaporative Emission) System. Refer to DESCRIPTION.
Scheme 234
- DTC P0451: Canister pressure sensor noising or stuck If the canister pressure sensor output voltage fluctuates rapidly for 10 seconds, the ECM stops the EVAP system monitor. The ECM interprets this as noise from the pressure sensor, and stops the EVAP system monitor. The ECM then illuminates the MIL and sets the DTC. Alternatively, if the sensor output voltage does not change for 10 seconds, the ECM interprets this as the sensor being stuck, and stops the monitor. The ECM then illuminates the MIL and sets the DTC. (Both the malfunctions are detected by 2 trip detection logic).
- DTC P0452: Canister pressure sensor voltage low If the canister pressure sensor output voltage is below 0.45 V, the ECM interprets this as an open or short circuit in the pressure sensor or its circuit, and stops the EVAP system monitor. The ECM then illuminates the MIL and sets the DTC (1 trip detection logic).
- DTC P0453: Canister pressure sensor voltage high If the canister pressure sensor voltage output is 4.9 V or more, the ECM interprets this as an open or short circuit in the pressure sensor or its circuit, and stops the EVAP system monitor. The ECM then illuminates the MIL and sets the DTC (1 trip detection logic).
The circuit description can be found in the EVAP (Evaporative Emission) System. Refer to DESCRIPTION.
MONITOR DESCRIPTION
- DTC P0451: Canister pressure sensor noising or stuck If the canister pressure sensor output voltage fluctuates rapidly for 10 seconds, the ECM stops the EVAP system monitor. The ECM interprets this as noise from the pressure sensor, and stops the EVAP system monitor. The ECM then illuminates the MIL and sets the DTC. Alternatively, if the sensor output voltage does not change for 10 seconds, the ECM interprets this as the sensor being stuck, and stops the monitor. The ECM then illuminates the MIL and sets the DTC. (Both the malfunctions are detected by 2 trip detection logic).
- DTC P0452: Canister pressure sensor voltage low If the canister pressure sensor output voltage is below 0.45 V, the ECM interprets this as an open or short circuit in the pressure sensor or its circuit, and stops the EVAP system monitor. The ECM then illuminates the MIL and sets the DTC (1 trip detection logic).
- DTC P0453: Canister pressure sensor voltage high If the canister pressure sensor voltage output is 4.9 V or more, the ECM interprets this as an open or short circuit in the pressure sensor or its circuit, and stops the EVAP system monitor. The ECM then illuminates the MIL and sets the DTC (1 trip detection logic).
The circuit description can be found in the EVAP (Evaporative Emission) System. Refer to DESCRIPTION.
5 hours*1 after the ignition switch is turned off, the leak detection pump creates negative pressure (vacuum) in the EVAP (Evaporative Emission) system. The ECM monitors for leaks and actuator malfunctions based on the EVAP pressure.
HINT
*1: If the engine coolant temperature is not below 35°C (95°F) 5 hours after the ignition switch is turned off, the monitor check starts 2 hours later. If it is still not below 35°C (95°F) 7 hours after the ignition switch is turned off, the monitor check starts 2.5 hours later.
| Sequence | Operation | Description | Duration |
|---|---|---|---|
| ECM activation | Activated by soak timer, 5 hours (7 or 9.5 hours) after ignition switch turned off. | ||
| A | Atmospheric pressure measurement | Vent valve turned OFF (vent) and EVAP system pressure measured by ECM in order to register atmospheric pressure. If pressure in EVAP system not between 70 kPa and 110 kPa (525 mmHg and 825 mmHg), ECM cancels EVAP system monitor. | 60 seconds |
| B | First 0.02 inch leak pressure measurement | In order to determine 0.02 inch leak pressure standard, leak detection pump creates negative pressure (vacuum) through 0.02 inch orifice and then ECM checks if leak detection pump and vent valve operate normally. | 60 seconds |
| C | EVAP system pressure measurement | Vent valve turned ON (closed) to shut EVAP system. Negative pressure (vacuum) created in EVAP system, and EVAP system pressure then measured. Write down measured value as they will be used in leak check. If EVAP pressure does not stabilize within 15 minutes, ECM cancels EVAP system monitor. | 15 minutes*2 |
| D | Purge VSV monitor | Purge VSV opened and then EVAP system pressure measured by ECM. Large increase indicates normal. | 10 seconds |
| E | Second 0.02 inch leak pressure measurement | After second 0.02 inch leak pressure measurement, leak check performed by comparing first and second 0.02 inch leak pressure standards. If stabilized system pressure higher than second 0.02 inch leak pressure standard, ECM determines that EVAP system leaking. | 60 seconds |
| F | Final check | Atmospheric pressure measured and then monitoring result recorded by ECM. |
HINT
*2: If only a small amount of fuel is in the fuel tank, it takes longer for the EVAP pressure to stabilize.
Scheme 235
Scheme 236
- P0455: EVAP (Evaporative Emission) gross leak In operation C, the leak detection pump creates negative pressure (vacuum) in the EVAP system and the EVAP system pressure is measured. If the stabilized system pressure is higher than [second 0.02 inch leak pressure standard x 0.2] (near atmospheric pressure), the ECM determines that the EVAP system has a large leak, illuminates the MIL and sets the DTC (2 trip detection logic).
- P0456: EVAP very small leak In operation C, the leak detection pump creates negative pressure (vacuum) in the EVAP system and the EVAP system pressure is measured. If the stabilized system pressure is higher than the second 0.02 inch leak pressure standard, the ECM determines that the EVAP system has a small leak, illuminates the MIL and sets the DTC (2 trip detection logic).
The circuit description can be found in the EVAP (Evaporative Emission) System. Refer to EVAP System.
5 hours*1 after the ignition switch is turned off, the leak detection pump creates negative pressure (vacuum) in the EVAP (Evaporative Emission) system. The ECM monitors for leaks and actuator malfunctions based on the EVAP pressure.
HINT
*1: If the engine coolant temperature is not below 35°C (95°F) 5 hours after the ignition switch is turned off, the monitor check starts 2 hours later. If it is still not below 35°C (95°F) 7 hours after the ignition switch is turned off, the monitor check starts 2.5 hours later.
| Sequence | Operation | Description | Duration |
|---|---|---|---|
| ECM activation | Activated by soak timer, 5 hours (7 or 9.5 hours) after ignition switch turned off. | ||
| A | Atmospheric pressure measurement | Vent valve turned OFF (vent) and EVAP system pressure measured by ECM in order to register atmospheric pressure. If pressure in EVAP system not between 70 kPa and 110 kPa (525 mmHg and 825 mmHg), ECM cancels EVAP system monitor. | 60 seconds |
| B | First 0.02 inch leak pressure measurement | In order to determine 0.02 inch leak pressure standard, leak detection pump creates negative pressure (vacuum) through 0.02 inch orifice and then ECM checks if leak detection pump and vent valve operate normally. | 60 seconds |
| C | EVAP system pressure measurement | Vent valve turned ON (closed) to shut EVAP system. Negative pressure (vacuum) created in EVAP system, and EVAP system pressure then measured. Write down measured value as they will be used in leak check. If EVAP pressure does not stabilize within 15 minutes, ECM cancels EVAP system monitor. | 15 minutes*2 |
| D | Purge VSV monitor | Purge VSV opened and then EVAP system pressure measured by ECM. Large increase indicates normal. | 10 seconds |
| E | Second 0.02 inch leak pressure measurement | After second 0.02 inch leak pressure measurement, leak check performed by comparing first and second 0.02 inch leak pressure standards. If stabilized system pressure higher than second 0.02 inch leak pressure standard, ECM determines that EVAP system leaking. | 60 seconds |
| F | Final check | Atmospheric pressure measured and then monitoring result recorded by ECM. |
HINT
*2: If only a small amount of fuel is in the fuel tank, it takes longer for the EVAP pressure to stabilize.
- P0455: EVAP (Evaporative Emission) gross leak In operation C, the leak detection pump creates negative pressure (vacuum) in the EVAP system and the EVAP system pressure is measured. If the stabilized system pressure is higher than [second 0.02 inch leak pressure standard x 0.2] (near atmospheric pressure), the ECM determines that the EVAP system has a large leak, illuminates the MIL and sets the DTC (2 trip detection logic).
- P0456: EVAP very small leak In operation C, the leak detection pump creates negative pressure (vacuum) in the EVAP system and the EVAP system pressure is measured. If the stabilized system pressure is higher than the second 0.02 inch leak pressure standard, the ECM determines that the EVAP system has a small leak, illuminates the MIL and sets the DTC (2 trip detection logic).
The speed sensor detects the wheel speed and sends the appropriate signals to the skid control ECU. The skid control ECU converts these wheel speed signals into a 4-pulse signal and outputs it to the ECM via the combination meter assembly. The ECM determines the vehicle speed based on the frequency of these pulse signals.
Scheme 237
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0500 | Both of the following conditions (A) and (B) are met (1 trip detection logic) (A) Either of the following conditions 1 or 2 is met All of the following conditions (a), (b) and (c) are met Engine coolant temperature is 20°C (68°F) or more Engine coolant temperature sensor circuit malfunction is not detected Time after NSW input signal on to off is 10 seconds or more All of the following conditions (a), (b) and (c) are met Engine coolant temperature is less than 20°C (68°F) Engine coolant temperature sensor malfunction is detected Time after NSW input signal on to off is 30 seconds or more (B) While vehicle is being driven, no vehicle speed sensor signal is sent to ECM | Vehicle speed sensor Vehicle speed sensor signal circuit Combination meter assembly ECM Skid control ECU |
If there is no speed signal from the combination meter assembly even though the ECM determines that the vehicle is being driven, the ECM interprets this as a malfunction in the speed signal circuit. The ECM then illuminates the MIL and sets the DTC.
The speed sensor detects the wheel speed and sends the appropriate signals to the skid control ECU. The skid control ECU converts these wheel speed signals into a 4-pulse signal and outputs it to the ECM via the combination meter assembly. The ECM determines the vehicle speed based on the frequency of these pulse signals.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0500 | Both of the following conditions (A) and (B) are met (1 trip detection logic) (A) Either of the following conditions 1 or 2 is met All of the following conditions (a), (b) and (c) are met Engine coolant temperature is 20°C (68°F) or more Engine coolant temperature sensor circuit malfunction is not detected Time after NSW input signal on to off is 10 seconds or more All of the following conditions (a), (b) and (c) are met Engine coolant temperature is less than 20°C (68°F) Engine coolant temperature sensor malfunction is detected Time after NSW input signal on to off is 30 seconds or more (B) While vehicle is being driven, no vehicle speed sensor signal is sent to ECM | Vehicle speed sensor Vehicle speed sensor signal circuit Combination meter assembly ECM Skid control ECU |
If there is no speed signal from the combination meter assembly even though the ECM determines that the vehicle is being driven, the ECM interprets this as a malfunction in the speed signal circuit. The ECM then illuminates the MIL and sets the DTC.
The stop light switch assembly is 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. If the signals, which indicate the brake pedal is being depressed and released, are detected simultaneously, the ECM interprets this as a malfunction in the stop light switch assembly and sets the DTC.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0504 | Conditions (a) and (b) continue for 0.5 seconds or more (1 trip detection logic): (a) Ignition switch to ON (b) STP signal OFF when ST1- signal OFF | Open or short in stop light switch assembly signal circuit Stop light switch assembly ECM |
| P0724 | Stop light switch assembly remains ON even when the vehicle is driven in a STOP (less than 1.86 mph (3 km/h)) and GO (18.65 mph (30 km/h) or more) fashion 5 times. (2 trip detection logic) |
This DTC indicates that the stop light switch assembly remains 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 and the MIL comes on and the ECM stores the DTC. The vehicle must stop (less than 1.86 mph (3 km/h)) and go (18.65 mph (30 km/h) or more) 5 times in 2 driving cycles in order to detect a malfunction.
The stop light switch assembly is 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. If the signals, which indicate the brake pedal is being depressed and released, are detected simultaneously, the ECM interprets this as a malfunction in the stop light switch assembly and sets the DTC.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0504 | Conditions (a) and (b) continue for 0.5 seconds or more (1 trip detection logic): (a) Ignition switch to ON (b) STP signal OFF when ST1- signal OFF | Open or short in stop light switch assembly signal circuit Stop light switch assembly ECM |
| P0724 | Stop light switch assembly remains ON even when the vehicle is driven in a STOP (less than 1.86 mph (3 km/h)) and GO (18.65 mph (30 km/h) or more) fashion 5 times. (2 trip detection logic) |
This DTC indicates that the stop light switch assembly remains 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 and the MIL comes on and the ECM stores the DTC. The vehicle must stop (less than 1.86 mph (3 km/h)) and go (18.65 mph (30 km/h) or more) 5 times in 2 driving cycles in order to detect a malfunction.
The idle speed is controlled by the Electronic Throttle Control System (ETCS). The ETCS is comprised of: 1) one valve type throttle body; 2) the throttle actuator, which operates the throttle valve; 3) the throttle position sensor, which detects the opening angle of the throttle valve; 4) the accelerator pedal position sensor, which detects the accelerator pedal position; 5) the ECM, which controls the ETCS. Based on the target idle speed, the ECM controls the throttle actuator to provide the proper throttle valve opening angle.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0505 | Idle speed continues to vary greatly from target speed (2 trip detection logic) | ETCS Air induction system PCV hose connection ECM |
The ECM monitors the idling speed and idling air flow volume to conduct Idle Speed Control (ISC). The ECM determines that the ISC system is malfunctioning if either of the following conditions is met
- The difference between the target engine idling speed and actual engine idling speed exceeds the threshold and the IAC flow rate learned value is stuck at the upper or lower limit for 5 seconds or more.
- The difference between the target engine idling speed and actual engine idling speed exceeds the threshold 5 times or more and the vehicle is driven in a Go [6.25 mph (10 km/h) or more] and Stop pattern 5 times or more, and then the system determines that the IAC flow rate learned value is stuck at the upper or lower limit, or that the IAC flow rate learned value has been changed by an amount that exceeds the threshold.
Scheme 238
The idle speed is controlled by the Electronic Throttle Control System (ETCS). The ETCS is comprised of: 1) one valve type throttle body; 2) the throttle actuator, which operates the throttle valve; 3) the throttle position sensor, which detects the opening angle of the throttle valve; 4) the accelerator pedal position sensor, which detects the accelerator pedal position; 5) the ECM, which controls the ETCS. Based on the target idle speed, the ECM controls the throttle actuator to provide the proper throttle valve opening angle.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0505 | Idle speed continues to vary greatly from target speed (2 trip detection logic) | ETCS Air induction system PCV hose connection ECM |
The ECM monitors the idling speed and idling air flow volume to conduct Idle Speed Control (ISC). The ECM determines that the ISC system is malfunctioning if either of the following conditions is met
- The difference between the target engine idling speed and actual engine idling speed exceeds the threshold and the IAC flow rate learned value is stuck at the upper or lower limit for 5 seconds or more.
- The difference between the target engine idling speed and actual engine idling speed exceeds the threshold 5 times or more and the vehicle is driven in a Go [6.25 mph (10 km/h) or more] and Stop pattern 5 times or more, and then the system determines that the IAC flow rate learned value is stuck at the upper or lower limit, or that the IAC flow rate learned value has been changed by an amount that exceeds the threshold.
The Electronic Throttle Control System (ETCS) controls the engine idle speed. The ETCS operates the throttle actuator to open and close the throttle valve, and adjusts the intake air amount to achieve the target idle speed.
In addition, the ECM retards the ignition timing and the ETCS increases the intake air amount to quickly increase the catalyst temperature at cold start to reduce emissions.
| DTC No. | DTC Detection Conditions | Trouble Areas |
|---|---|---|
| P050A | Insufficient mass air flow after a cold start (2 trip detection logic). | Throttle body assembly Mass air flow meter Air induction system PCV hose connections VVT system Air cleaner filter element ECM Wire harness or connector |
Scheme 239
The ECM monitors the intake air amount during idling and the ignition timing.
When the Engine Coolant Temperature (ECT) is between -10°C and 50°C (14°F and 122°F), the ECM calculates the idling intake air amount for 10 seconds, beginning 3 seconds after the engine starts.
When the accumulated value is below the threshold, the ECM interprets this as a malfunction in the Idle Speed Control (ISC) system at cold start.
The ECM also monitors the ignition timing at cold start, and judges it to be incorrect when it is advanced to the same value for a warm engine for 5 seconds or more of the 10 second monitoring period.
Note. When the negative battery terminal is disconnected during inspection or repairs, the ISC learning values are cleared. The ISC learning must be performed by warming up the engine and idling for 5 minutes with the ECT at 75°C (167°F) or more because DTCs cannot be detected with the ISC learning values cleared.
The Electronic Throttle Control System (ETCS) controls the engine idle speed. The ETCS operates the throttle actuator to open and close the throttle valve, and adjusts the intake air amount to achieve the target idle speed.
In addition, the ECM retards the ignition timing and the ETCS increases the intake air amount to quickly increase the catalyst temperature at cold start to reduce emissions.
| DTC No. | DTC Detection Conditions | Trouble Areas |
|---|---|---|
| P050A | Insufficient mass air flow after a cold start (2 trip detection logic). | Throttle body assembly Mass air flow meter Air induction system PCV hose connections VVT system Air cleaner filter element ECM Wire harness or connector |
The ECM monitors the intake air amount during idling and the ignition timing.
When the Engine Coolant Temperature (ECT) is between -10°C and 50°C (14°F and 122°F), the ECM calculates the idling intake air amount for 10 seconds, beginning 3 seconds after the engine starts.
When the accumulated value is below the threshold, the ECM interprets this as a malfunction in the Idle Speed Control (ISC) system at cold start.
The ECM also monitors the ignition timing at cold start, and judges it to be incorrect when it is advanced to the same value for a warm engine for 5 seconds or more of the 10 second monitoring period.
Note. When the negative battery terminal is disconnected during inspection or repairs, the ISC learning values are cleared. The ISC learning must be performed by warming up the engine and idling for 5 minutes with the ECT at 75°C (167°F) or more because DTCs cannot be detected with the ISC learning values cleared.
This monitor will run when the engine is started at -10 to 50°C (14 to 122°F) of the engine coolant temperature. The DTC will be set after the engine idling for 13 seconds (2 trip detection logic).
The DTC is designed to monitor the idle air control at cold start. When the engine is started at lower than 50°C (122°F) of the engine coolant temperature, the ECM measures the accumulated mass air flow at the engine idling. If it does not reach the criteria within 10 seconds, the ECM interprets this as a malfunction. The MIL is illuminated and a DTC is set when the malfunction is detected in consecutive driving cycles (2 trip detection logic).
The ETCS (Electrical Throttle Control System) controls the idle speed. The ETCS operates the throttle actuator to open and close the throttle valve, and adjusts the intake air amount to achieve the target idle speed.
Note. When the negative battery terminal is disconnected during inspection or repairs, the ISC (Idle Speed Control) learned values are cleared. ISC learning is performed when the engine has been warmed up and idled for 5 minutes because this DTC cannot be set after the ISC learned values cleared.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P050B | Insufficient ignition timing retard at cold start (2 trip detection logic). | Throttle body assembly Mass air flow meter Intake system PCV hose connections VVT system Air cleaner filter element ECM Wire harness or connector |
Scheme 240
This monitor will run when the engine is started at -10 to 50°C (14 to 122°F) of the engine coolant temperature. The DTC will be set after the engine idling for 13 seconds (2 trip detection logic).
The DTC is designed to monitor the idle air control at cold start. When the engine is started at lower than 50°C (122°F) of the engine coolant temperature, the ECM measures the accumulated mass air flow at the engine idling. If it does not reach the criteria within 10 seconds, the ECM interprets this as a malfunction. The MIL is illuminated and a DTC is set when the malfunction is detected in consecutive driving cycles (2 trip detection logic).
The ETCS (Electrical Throttle Control System) controls the idle speed. The ETCS operates the throttle actuator to open and close the throttle valve, and adjusts the intake air amount to achieve the target idle speed.
Note. When the negative battery terminal is disconnected during inspection or repairs, the ISC (Idle Speed Control) learned values are cleared. ISC learning is performed when the engine has been warmed up and idled for 5 minutes because this DTC cannot be set after the ISC learned values cleared.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P050B | Insufficient ignition timing retard at cold start (2 trip detection logic). | Throttle body assembly Mass air flow meter Intake system PCV hose connections VVT system Air cleaner filter element ECM Wire harness or connector |
The battery supplies electricity to the ECM even when the ignition switch is off. This power allows the ECM to store data such as DTC history, freeze frame data and fuel trim values. If the battery voltage falls below a minimum level, these memories are cleared and the ECM determines that there is a malfunction in the power supply circuit. When the engine is next started, the ECM illuminates the MIL and sets the DTC.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0560 | Open in ECM back-up power source circuit (1 trip detection logic) | Open in back-up power source circuit EFI No. 1 fuse ECM |
HINT
If DTC P0560 is set, the ECM does not store other DTCs.
The battery supplies electricity to the ECM even when the ignition switch is off. This power allows the ECM to store data such as DTC history, freeze frame data and fuel trim values. If the battery voltage falls below a minimum level, these memories are cleared and the ECM determines that there is a malfunction in the power supply circuit. When the engine is next started, the ECM illuminates the MIL and sets the DTC.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0560 | Open in ECM back-up power source circuit (1 trip detection logic) | Open in back-up power source circuit EFI No. 1 fuse ECM |
HINT
If DTC P0560 is set, the ECM does not store other DTCs.
The ECM continuously monitors its internal memory status. This self-check ensures that the ECM is functioning properly. It is diagnosed by internal "mirroring" of the main CPU and sub CPU to detect the Random Access Memory (RAM) errors. If outputs from these CPUs are different and deviate from the standards, the ECM will illuminate the MIL and set a DTC immediately.
| DTC | DTC Setting Condition | Trouble Area |
|---|---|---|
| P0604 | ECM RAM errors | ECM |
The ECM continuously monitors its internal memory status. This self-check ensures that the ECM is functioning properly. It is diagnosed by internal "mirroring" of the main CPU and sub CPU to detect the Random Access Memory (RAM) errors. If outputs from these CPUs are different and deviate from the standards, the ECM will illuminate the MIL and set a DTC immediately.
| DTC | DTC Setting Condition | Trouble Area |
|---|---|---|
| P0604 | ECM RAM errors | ECM |
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 standards, the ECM will illuminate the MIL and set the DTC immediately.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0606 | ECM main CPU error | ECM |
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 standards, the ECM will illuminate the MIL and set the DTC immediately.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0606 | ECM main CPU error | ECM |
The ECM continuously monitors its internal processors (CPUs) and Heated Oxygen (HO2) sensor transistors. This self-check ensures that the ECM is functioning properly.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0607 | ECM CPUs malfunction Heated Oxygen (HO2) sensor transistor (built into ECM) malfunctions | Exhaust gas leak HO2 sensor ECM |
The ECM continuously monitors its internal processors (CPUs) and Heated Oxygen (HO2) sensor transistors. This self-check ensures that the ECM is functioning properly.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0607 | ECM CPUs malfunction Heated Oxygen (HO2) sensor transistor (built into ECM) malfunctions | Exhaust gas leak HO2 sensor ECM |
The main CPU and sub CPU of the ECM perform data communication between each other. The main CPU monitors the communications and WDC pulses from the sub CPU. When the signal malfunctions below are detected, the DTC is output.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P060A | ECM sub CPU error | ECM |
The main CPU and sub CPU of the ECM perform data communication between each other. The main CPU monitors the communications and WDC pulses from the sub CPU. When the signal malfunctions below are detected, the DTC is output.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P060A | ECM sub CPU error | ECM |
The ECM monitors the input signals of the No. 1 Accelerator Pedal Position (APP) sensor. When the input signals and control signals are deviated, the DTC is output.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P060D | ECM main CPU error | ECM |
The ECM monitors the input signals of the No. 1 Accelerator Pedal Position (APP) sensor. When the input signals and control signals are deviated, the DTC is output.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P060D | ECM main CPU error | ECM |
The ECM monitors the input signals of the No. 1 Throttle Position (TP) sensor and stop light switch. As the ECM monitors the input signals of the No. 1 TP sensor and the STP signals of the stop light switch, if the input signals and control signals are deviated, the DTC is output.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P060E | ECM main CPU error | ECM |
The ECM monitors the input signals of the No. 1 Throttle Position (TP) sensor and stop light switch. As the ECM monitors the input signals of the No. 1 TP sensor and the STP signals of the stop light switch, if the input signals and control signals are deviated, the DTC is output.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P060E | ECM main CPU error | ECM |
While the engine is being cranked, the positive battery voltage is applied to terminal STA of the ECM.
If the ECM detects the Starter Control (STA) signal while the vehicle is being driven, it determines that there is a malfunction in the STA circuit. The ECM then illuminates the MIL and sets the DTC.
This monitor runs when the vehicle is driven at 12.43 mph (20 km/h) for over 20 seconds.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0617 | When conditions (a), (b) and (c) are met, positive (+B) battery voltage 10.5 V or more is applied to ECM for 20 seconds (1 trip detection logic): (a) Vehicle speed 12.43 mph (20 km/h) or more (b) Engine speed 1000 RPM or more (c) STA signal ON | Park/Neutral Position (PNP) switch Starter relay (ST) circuit Cranking holding function circuit (with smart key system) Ignition switch (without smart key system) ECM |
While the engine is being cranked, the positive battery voltage is applied to terminal STA of the ECM.
If the ECM detects the Starter Control (STA) signal while the vehicle is being driven, it determines that there is a malfunction in the STA circuit. The ECM then illuminates the MIL and sets the DTC.
This monitor runs when the vehicle is driven at 12.43 mph (20 km/h) for over 20 seconds.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0617 | When conditions (a), (b) and (c) are met, positive (+B) battery voltage 10.5 V or more is applied to ECM for 20 seconds (1 trip detection logic): (a) Vehicle speed 12.43 mph (20 km/h) or more (b) Engine speed 1000 RPM or more (c) STA signal ON | Park/Neutral Position (PNP) switch Starter relay (ST) circuit Cranking holding function circuit (with smart key system) Ignition switch (without smart key system) ECM |
The ECM monitors its internal operation and it stores this DTC when it detects an internal malfunction.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P062F | An ECM internal error (EEPROM) | ECM |
The ECM monitors its internal operation. If the internal operation is malfunctioning, the ECM illuminates the MIL and stores a DTC.
The ECM monitors its internal operation and it stores this DTC when it detects an internal malfunction.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P062F | An ECM internal error (EEPROM) | ECM |
The ECM monitors its internal operation. If the internal operation is malfunctioning, the ECM illuminates the MIL and stores a DTC.
DTC P0630 is set when the Vehicle Identification Number (VIN) is not stored in the Engine Control Module (ECM) or the input VIN is not accurate. Input the VIN with Techstream.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0630 | VIN not stored in ECM VIN input in ECM is not accurate | ECM |
DTC P0630 is set when the Vehicle Identification Number (VIN) is not stored in the Engine Control Module (ECM) or the input VIN is not accurate. Input the VIN with Techstream.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0630 | VIN not stored in ECM VIN input in ECM is not accurate | ECM |
The ECM monitors the output voltage to the throttle actuator. This self-check ensures that the ECM is functioning properly. The output voltage is usually 0 V when the ignition switch is turned off. If the output voltage is higher than 7 Volts when the ignition switch is turned off, the ECM will illuminate the MIL and set the DTC when the ignition switch is turned to ON.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0657 | Throttle actuator power supply error | ECM |
The ECM monitors the output voltage to the throttle actuator. This self-check ensures that the ECM is functioning properly. The output voltage is usually 0 V when the ignition switch is turned off. If the output voltage is higher than 7 Volts when the ignition switch is turned off, the ECM will illuminate the MIL and set the DTC when the ignition switch is turned to ON.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0657 | Throttle actuator power supply error | ECM |
The park / neutral position switch detects the shift lever position and sends signals to the ECM.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0705 | (A) Any two of the following conditions are met (2 trip detection logic). (a) One of the following conditions is met P input signal is ON. N input signal is ON. NSW input signal is ON. (b) R input signal is ON (c) D input signal is ON (B) All switches are OFF simultaneously for NSW, P, R, N and D (2 trip detection logic). (C) Any of following conditions is met for 2.0 seconds or more in the S position (2 trip detection logic). NSW input signal is ON. P input signal is ON. N input signal is ON. R input signal is ON. | Open or short in park/neutral position switch circuit Park/neutral position switch Open or short in transmission control switch circuit ECM |
These DTCs indicate a problem with the park/neutral position switch and the wire harness in the park/neutral position switch circuit.
The park/neutral position switch detects the shift lever position and sends a signal to the ECM.
For security, the park/neutral position switch detects the shift lever position so that the engine can be started only when the shift lever is in the P or N position.
The park/neutral position switch sends a signal to the ECM according to the shift position (P, R, N or D). The ECM determines that there is a problem with the switch or related parts if it receives more than 1 position signal simultaneously. The ECM will turn on the MIL and store the DTC.
The park / neutral position switch detects the shift lever position and sends signals to the ECM.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0705 | (A) Any two of the following conditions are met (2 trip detection logic). (a) One of the following conditions is met P input signal is ON. N input signal is ON. NSW input signal is ON. (b) R input signal is ON (c) D input signal is ON (B) All switches are OFF simultaneously for NSW, P, R, N and D (2 trip detection logic). (C) Any of following conditions is met for 2.0 seconds or more in the S position (2 trip detection logic). NSW input signal is ON. P input signal is ON. N input signal is ON. R input signal is ON. | Open or short in park/neutral position switch circuit Park/neutral position switch Open or short in transmission control switch circuit ECM |
These DTCs indicate a problem with the park/neutral position switch and the wire harness in the park/neutral position switch circuit.
The park/neutral position switch detects the shift lever position and sends a signal to the ECM.
For security, the park/neutral position switch detects the shift lever position so that the engine can be started only when the shift lever is in the P or N position.
The park/neutral position switch sends a signal to the ECM according to the shift position (P, R, N or D). The ECM determines that there is a problem with the switch or related parts if it receives more than 1 position signal simultaneously. The ECM will turn on the MIL and store the DTC.
See also:
• INSPECTION