Advanced Diagnostics: Other Honda S2000 I

Malfunction Threshold

The MAP sensor output voltage is 0.23 V or less for at least 2 seconds.

Conditions for illuminating the MIL

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

Conditions for clearing the MIL

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

The MAP sensor output voltage is 4.49 V or more for at least 2 seconds.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Intake Air Temperature (IAT) Sensor Circuit Range/Performance Problem - Graph. Scheme 166

A malfunction is detected if these three conditions are not present after the engine and the ignition switch have been off for at least 6 hours

1. When the temperature (IAT minus ECT1) is not 63°F (35°C) or less.
2. When the temperature (IAT minus ECT2) is not 46°F (26°C) or less.
3. When the temperature (ECT2 minus ECT1) is not 84°F (47°C) or less.

Driving Pattern

1. Turn the ignition off, and wait at least 6 hours.
2. Start the engine, and let it idle for at least 10 seconds.

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Intake Air Temperature (IAT) Sensor Circuit - Wiring Diagram. Scheme 167

Intake Air Temperature (IAT) Sensor Output Voltage - Graph. Scheme 168

The IAT sensor output voltage is 0.08 V or less for at least 2 seconds.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

The IAT sensor output voltage is 4.92 V or more for at least 2 seconds.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Engine Coolant Temperature (ECT) Sensor 1 Circuit Range/ Performance Problem - Graph. Scheme 169

Malfunction determination 1

With a completely cooled engine (one that has been off for at least 6 hours)

When the change in coolant temperature after 10 minutes or more of running time is 50°F (10°C) or less, a malfunction is detected.

Malfunction determination 2: With a partially cooled engine (one that has been off for less than 6 hours)

When the difference between the coolant temperature after 10 minutes or more of running time minus the coolant temperature

after the engine has been off for 180 minutes and then run for 10 seconds is 50°F (10°C) or less, a malfunction is detected.

1. With a completely cooled engine (one that has been off for at least 6 hours).

1. Start the engine, and let it idle for at least 10 minutes.
2. Turn off the ignition for 10 seconds, then restart the engine and let it idle for at least 10 seconds.

1. With a partially cooled engine (one that has been off for less than 6 hours).

1. Start the engine, and let it idle for at least 10 minutes.
2. Turn off the ignition for 180 minutes, then restart the engine and let it idle for at least 10 seconds.

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Engine Coolant Temperature (ECT) Sensor 1 Circuit - Wiring Diagram. Scheme 170

Engine Coolant Temperature (ECT) Sensor 1 Output Voltage - Graph. Scheme 171

The ECT sensor 1 output voltage is 0.08 V or less for at least 2 seconds.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

The ECT sensor 1 output voltage is 4.92 V or more for at least 2 seconds.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Throttle Position (TP) Sensor A Circuit - Wiring Diagram. Scheme 172

The TP sensor A output voltage is 0.3 V or less for at least 0.2 second.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

The TP sensor A output voltage is 4.8 V or more for at least 0.2 second.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Engine Coolant Temperature (ECT) Sensor 1 Malfunction/Slow Response - Graph. Scheme 173

The engine running time before the engine coolant temperature reaches 98°F (36°C), based on the initial engine coolant temperatures, is as follows.

TEMPERATURE CHART

1. Start the engine at an engine coolant temperature as specified under Enable Conditions.
2. Let the engine idle for at least 20 minutes.

When a malfunction is detected during the first drive cycle with the ECT and IAT at engine start-up within the specified temperature range, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle with the ECT and IAT at engine start-up within the specified temperature range, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Cooling System Malfunction - Graph. Scheme 174

Malfunction determination 1

If the difference between the current measured coolant temperature at the radiator (ECT 2) and the initial coolant temperature at the radiator (ECT 2) is at least 46°F (8°C) when the estimated coolant temperature at the engine (ECT 1) reaches 164°F (74°C), a malfunction is detected (thermostat stuck open); or if the coolant temperature at the radiator (ECT 2) only reaches 72°F (22°C), a malfunction is detected (thermostat malfunction).

Malfunction determination 2

When the estimated engine coolant temperature (ECT 1) reaches 159°F (71°C) before the measured engine coolant temperature (ECT 1) reaches 159°F (71°C), a malfunction is detected.

1. Start the engine under the conditions specified under Enable Conditions.
2. Drive the vehicle at a speed between 15 - 75 mph (24 - 120 km/h) for at least 10 minutes.

1. Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

When a malfunction is detected during the first drive cycle with the ECT and IAT at engine start-up within the specified temperature range, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle with the ECT and IAT at engine start-up within the specified temperature range, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Air/Fuel Ratio (A/F) Sensor (Sensor 1) Slow Response - Graph. Scheme 175

The average of the A/F sensor inversion cycle 27 periods or less is at least 8 seconds.

Driving Pattern - Graph. Scheme 176

1. Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on.
2. Drive the vehicle at a steady speed up to 25 mph (40 km/h), for at least 5 minutes.
3. Then, drive immediately at a steady speed between 26 - 81 mph (41 - 130 km/h) for at least 8 seconds.

1. If the EVAP monitor runs instead of the HO2S monitor, turn the engine off, then restart it, and the HO2S monitor will restart.
2. Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Air/Fuel Ratio (A/F) Sensor (Sensor 1) Heater System Malfunction. Scheme 177

Malfunction determination 1

The A/F sensor internal resistance value is 50 ohms or more for at least 40 seconds right after the engine starts.

Malfunction determination 2

1. The A/F sensor internal resistance value is 50 ohms or more for at least 15 seconds.
2. The A/F sensor internal resistance value is 80 ohms or more for at least 1 second.

Start the engine, then let it idle for at least 2 minutes.

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Air/Fuel Ratio (A/F) Sensor (Sensor 1) Heater Malfunction - Circuit Diagram. Scheme 178

One of these conditions must be met.

1. The heater current is 0.8 A or less for at least 4 seconds while the heater is activated, and the heater current is 0.8 A or more for at least 4 seconds while the heater is not activated.
2. The heater current is 15.2 A or more for at least 0.6 seconds.

Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on, then let it idle.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Secondary Heated Oxygen Sensor (Secondary HO2S (Sensor 2)) - Circuit Diagram. Scheme 179

Secondary Heated Oxygen Sensor Output Voltage - Graph. Scheme 180

The secondary HO2S output voltage is 0.293 V or less for at least 30 seconds.

1. Start the engine. Let it idle until the radiator fan comes on.
2. Then, drive immediately at a steady engine speed between 1,500 - 3,000 rpm for at least 1 minute.

1. Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Secondary Heated Oxygen Sensor Output Voltage - Graph. Scheme 181

The secondary HO2S output voltage is 1.270 V or more for at least 5 seconds.

1. Start the engine. Let it idle until the radiator fan comes on.
2. Then, drive immediately at a steady engine speed between 1,500 - 3,000 rpm for at least 1 minute.

1. Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Secondary Heated Oxygen Sensor Output Voltage - Graph. Scheme 182

1. When the secondary HO2S output drops to the response deterioration judgment threshold value and the response characteristics measurement is finished. MALFUNCTION THRESHOLD CHART MIN 0.57 second MAX 1 second
2. The voltage does not drop to the response deterioration judgment threshold value after a predetermined time (1 second) has elapsed.

1. Start the engine. Let it idle until the radiator fan comes on.
2. Then, drive immediately at a steady speed of 35 mph (57 km/h) or more for at least 14.1 seconds.

1. Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Secondary Heated Oxygen Sensor (Secondary HO2S (Sensor 2)) Heater Circuit Wiring Diagram. Scheme 183

The current is 0.38 A or less, or 3.33 A or more, for at least 5 seconds when the heater is on.

Start the engine. Let it idle until the radiator fan comes on.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Fuel System - Graph. Scheme 184

Long term fuel trim is higher than 1.25 (+25 %).

1. Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on.
2. Then, drive at a steady speed between 15 - 75 mph (24 - 120 km/h) for at least 15 minutes, and watch the long term fuel trim. If the long term fuel trim stays at about 1.0, the vehicle is OK or it is a very minor problem. If a significant fault is still present, the long term fuel trim will move up or down while driving.

1. When freeze frame data is stored, drive the vehicle under those conditions instead of Driving Pattern 2.
2. If the EVAP monitor runs instead of the HO2S monitor, turn the engine off, then restart it, and the HO2S monitor will restart.
3. After clearing the DTC by disconnecting the battery or using the scan tool, extend Driving Pattern 2 to 40 minutes or longer to allow time for long term fuel trim to recover.
4. Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive drive cycles in which the engine conditions are similar to the first time the malfunction was detected.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Fuel System - Graph. Scheme 185

Long term fuel trim is lower than 0.80 (-20 %).

1. Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on.
2. Then, drive at a steady speed between 15 - 75 mph (24 - 120 km/h) for at least 15 minutes, and watch the long term fuel trim. If the long term fuel trim stays at about 1.0, the vehicle is OK or it is a very minor problem. If a significant fault is still present, the long term fuel trim will move up or down while driving.

1. When freeze frame data is stored, drive the vehicle under those conditions instead of Driving Pattern 2.
2. If the EVAP monitor runs instead of the HO2S monitor, turn the engine off, then restart it, and the HO2S monitor will restart.
3. After clearing the DTC by disconnecting the battery or using the scan tool, extend Driving Pattern 2 to 40 minutes or longer to allow time for long term fuel trim to recover.
4. Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive drive cycles in which the engine conditions are similar to the first time the malfunction was detected.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

The TP sensor B output voltage is 0.3 V or less for at least 0.2 second.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

The TP sensor B output voltage is 4.8 V or more for at least 0.2 second.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Crankshaft Position Sensor Pulse Data - Graph. Scheme 186

The number of misfires versus engine revolutions is equal to or greater than the values in the table.

MALFUNCTION THRESHOLD

Driving Pattern - Graph. Scheme 187

1. Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on.
2. Drive the vehicle at a speed between 15 - 75 mph (24 - 120 km/h) for at least 3 minutes.
3. Stop the vehicle, and let the engine idle for at least 3 minutes.

1. When freeze frame data is stored, drive the vehicle under those conditions instead of Driving Patterns 2 or 3.
2. When you have difficulty duplicating the DTC because of road conditions and traffic situations, repeat the driving pattern several times.
3. Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

Misfire Type 1: Under high rpm or high load conditions: The MIL blinks once per second if a type 1 misfire (catalyst damaging) occurs, and a Temporary DTC is stored. If the type 1 misfire ceases, the MIL goes off. If a type 1 misfire occurs during the next (second) drive cycle, the MIL blinks at the first misfire occurrence, and the DTC and the freeze frame data are stored. The MIL remains on steady if the type 1 misfire ceases.

Under normal driving conditions: The MIL blinks once per second if a type 1 misfire occurs a third time, and a Temporary DTC is stored. If a type 1 misfire occurs during the next (second) drive cycle, the MIL blinks during the third type 1 misfire occurrence, and the DTC and the freeze frame data are stored. If the type 1 misfire ceases, the MIL remains on steady.

Misfire Type 2: When a type 2 misfire (emission-related but not severe enough to immediately damage the TWC) occurs within the first 1,000 engine revolutions after engine start-up, a Temporary DTC is stored.

If a type 2 misfire occurs after the first 1,000 engine revolutions after engine start-up, a Temporary DTC is stored during the fourth type 2 misfire occurrence.

If a type 2 misfire occurs during the next (second) drive cycle, the MIL comes on, and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive drive cycles in which the engine conditions are similar to the first time the malfunction was detected.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

The number of misfires versus engine revolutions is equal to or greater than the values in the table.

MALFUNCTION THRESHOLD CHART

1. Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on.
2. Drive the vehicle at a speed between 15 - 75 mph (24 - 120 km/h) for at least 3 minutes.
3. Stop the vehicle, and let the engine idle for at least 3 minutes.

1. When freeze frame data is stored, drive the vehicle under those conditions instead of Driving Patterns 2 or 3.
2. When you have difficulty duplicating the DTC because of road conditions and traffic situations, repeat the driving pattern several times.
3. Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

Misfire Type 1: Under high rpm or high load conditions: The MIL blinks once per second if a type 1 misfire (catalyst damaging) occurs, and a Temporary DTC is stored. If the type 1 misfire ceases, the MIL goes off. If a type 1 misfire occurs during the next (second) drive cycle, the MIL blinks at the first misfire occurrence, and the DTC and the freeze frame data are stored. The MIL remains on steady if the type 1 misfire ceases.

Under normal driving conditions: The MIL blinks once per second if a type 1 misfire occurs a third time, and a Temporary DTC is stored. If a type 1 misfire occurs during the next (second) drive cycle, the MIL blinks during the third type 1 misfire occurrence, and the DTC and the freeze frame data are stored. If the type 1 misfire ceases, the MIL remains on steady.

Misfire Type 2: When a type 2 misfire (emission-related but not severe enough to immediately damage the TWC) occurs within the first 1,000 engine revolutions after engine start-up, a Temporary DTC is stored.

If a type 2 misfire occurs after the first 1,000 engine revolutions after engine start-up, a Temporary DTC is stored during the fourth type 2 misfire occurrence.

If a type 2 misfire occurs during the next (second) drive cycle, the MIL comes on, and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive drive cycles in which the engine conditions are similar to the first time the malfunction was detected.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Knock Sensor Malfunction - Circuit Diagram. Scheme 188

No signals from the knock sensor are detected for at least 5 seconds.

1. Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on.
2. Hold the engine speed at 3,000 - 4,000 rpm for at least 10 seconds.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Crankshaft Position (CKP) Sensor No Signal - Circuit Diagram. Scheme 189

No signals from the CKP sensor are input at least 50 times.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Abnormal signals from the CKP sensor are input at least 30 times.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Camshaft Position (CMP) Sensor No Signal - Circuit Diagram. Scheme 190

No CMP sensor pulsing signals are detected at least 50 times.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Abnormal CMP sensor pulsing signals are detected at least 30 times.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Catalyst System Efficiency Voltage And Time - Graph. Scheme 191

The number of detections is 272 (CTAGLT67) or more.

Driving Pattern - Graph. Scheme 192

1. Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on.
2. Drive the vehicle at a speed between 45 - 75 mph (73 - 120 km/h) for at least 5 minutes, to warm up the TWC.
3. Set a vehicle speed of 55 mph (88 km/h) on the cruise control, and drive for at least 1 minute.

1. Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Evaporative Emission (EVAP) Canister Purge Valve Malfunction - Circuit Diagram. Scheme 193

The return signal does not change according to the EVAP canister purge valve output for at least 5 seconds.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Fuel Tank Pressure (FTP) Sensor Range/Performance Problem - Circuit Diagram. Scheme 194

Fuel Tank Pressure (FTP) Sensor Voltage - Graph. Scheme 195

Fuel Tank Pressure - Graph. Scheme 196

The FTP sensor output fluctuates by 0.3 kPa (0.1 in.Hg, 2 mmHg) or more at least five times within 3 seconds.

Start the engine in a cold condition, and let it idle for at least 20 seconds.

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Fuel Tank Pressure Operation - Graph. Scheme 197

The output from the fuel tank pressure sensor is less than -7 kPa (-2.1 in.Hg, -55 mmHg) for at least 3 seconds.

Start the engine in a cold condition, and let it idle until the radiator fan comes on.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Fuel Tank Pressure Operation - Graph. Scheme 198

The output from the fuel tank pressure sensor is more than 8 kPa (2.2 in.Hg, 55 mmHg) for at least 3 seconds.

Start the engine in a cold condition, and let it idle until the radiator fan comes on.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Evaporative Emission (EVAP) System Large Leak Detected - Diagram. Scheme 199

Evaporative Emission (EVAP) System - Diagnosis Execution. Scheme 200

The variation of pressure inside the fuel tank is -2 kPa (-0.5 in.Hg, -11 mmHg) or more.

Confirmation Procedure with the HDS

Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS.

1. After the vehicle has been left for an appropriate amount of time as specified, with the engine coolant temperature and intake air temperature within the specified range, start the engine.
2. Warm up the engine at idle until the radiator fan comes on.
3. Drive the vehicle immediately at a speed between 45 - 75 mph (72 - 120 km/h) for at least 20 minutes.
4. After stopping the engine, turn the ignition switch off, and leave the vehicle for 32 minutes or more (EONV executes).

1. Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

When a malfunction is detected during the first drive cycle with the ECT and IAT at engine start-up within the specified temperature range, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle with the ECT and IAT at engine start-up within the specified temperature range, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

The variation of pressure inside the fuel tank after phase 1 is 0.3 kPa (0.1 in.Hg, 2.8 mmHg) or more (depending on fuel level and barometric pressure).

The sum of the variations of pressure inside the fuel tank after phase 1 and phase 2 is 10 kPa (3.1 in.Hg, 80 mmHg) or less (depending on fuel level and barometric pressure).

The barometric pressure is stable for at least 20 minutes.

Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS.

1. After the vehicle has been left for an appropriate amount of time as specified, with the engine coolant temperature and intake air temperature within the specified range, start the engine.
2. Warm up the engine at idle until the radiator fan comes on.
3. Drive the vehicle immediately at a speed between 45 - 75 mph (72 - 120 km/h) for at least 20 minutes.
4. After stopping the engine, turn the ignition switch off, and leave the vehicle for 32 minutes or more (EONV executes).

1. Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

When a malfunction is detected during the first drive cycle with the ECT and IAT at engine start-up within the specified temperature range, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle with the ECT and IAT at engine start-up within the specified temperature range, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Evaporative Emission (EVAP) System Leak Detected/Fuel Fill Cap Loose Or Missing - Graph. Scheme 201

1. The output from the fuel tank pressure sensor is -0.1 kPa (-0.05 in.Hg, -1.5 mmHg) or more for at least 45 seconds.
2. Fuel vapor density during compression is at least 0.1 g (0.004 oz) for up to 45 seconds.

Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS.

1. After the vehicle has been left for an appropriate amount of time as specified, with the engine coolant temperature and intake air temperature within the specified range, start the engine.
2. Warm up the engine at idle until the radiator fan comes on.
3. Drive the vehicle immediately at a speed between 45 - 75 mph (72 - 120 km/h) for at least 20 minutes.
4. After stopping the engine, turn the ignition switch off, and leave the vehicle for 32 minutes or more (EONV executes).

1. Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

Conditions for illuminating the fuel fill cap caution

When a malfunction is detected during the first drive cycle with the ECT at engine start-up within the specified temperature range, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle with the ECT at engine start-up within the sepcified temperature, the caution is indicated. If the malfunction recurs during the next (third) drive cycle with the ECT at engine start-up within the specified temperature range, the MIL comes on and the DTC and the freeze frame data are stored. The caution is cleared when the MIL comes on.

Conditions for clearing the fuel fill cap caution

The caution will be cleared if the malfunction does not recur during the EVAP system leakage diagnostic. The caution can be cleared by using the scan tool Clear command or by disconnecting the battery.

Fuel Level Sensor (Fuel Gauge Sending Unit) Circuit Range/ Performance Problem - Graph. Scheme 202

The change in the fuel level sensor output is 3.5 % or less.

Drive for the specified mileage under Enable Conditions without refueling. (Turning the ignition switch off is acceptable.)

1. Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

Conditions for illuminating the indicator

When a malfunction is detected, the DTC and the freeze frame data are stored in the ECM memory. The MIL does not come on.

The fuel level sensor (fuel gauge sending unit) output voltage is 0.10 V or less for at least 5 seconds.

When a malfunction is detected, the DTC and the freeze frame data are stored in the ECM memory. The MIL does not come on.

The fuel level sensor (fuel gauge sending unit) output voltage is 4.92 V or more for at least 5 seconds.

When a malfunction is detected, the DTC and the freeze frame data are stored in the ECM memory. The MIL does not come on.

The output from the fuel tank pressure sensor is -2 kPa (-0.6 in.Hg, -15 mmHg) or less for at least 10 seconds.

Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS.

Start the engine at an engine coolant temperature and intake air temperature as specified under Enable Conditions, and let it idle until the radiator fan comes on.

When a malfunction is detected during the first drive cycle with the ECT and IAT at engine start-up within the specified temperature range, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle with the ECT and IAT at engine start-up within the specified temperature range, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Evaporative Emission (EVAP) System Low Purge Flow - Graph. Scheme 203

The output from the fuel tank pressure sensor is at least -0.1 kPa (-0.05 in.Hg, -1.5 mmHg) for up to 45 seconds.

Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS.

1. After the vehicle has been left for an appropriate amount of time as specified, with the engine coolant temperature and intake air temperature within the specified range, start the engine.
2. Warm up the engine at idle until the radiator fan comes on.
3. Drive the vehicle immediately at a speed between 45 - 75 mph (72 - 120 km/h) for at least 20 minutes.
4. After stopping the engine, turn the ignition switch off, and leave the vehicle for 32 minutes or more (EONV executes).

1. Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

When a malfunction is detected during the first drive cycle with the ECT and IAT at engine start-up within the specified temperature range, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle with the ECT and IAT at engine start-up within the specified temperature range, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Evaporative Emission (EVAP) Canister Vent Shut Valve Circuit Diagram. Scheme 204

The return signal is "OFF" for at least 5 seconds when the ECM outputs the "ON" signal to the EVAP canister vent shut valve.

Do the EVAP CVS ON in the INSPECTION MENU with the HDS.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

The return signal is "ON" for at least 5 seconds when the ECM outputs the "OFF" signal to the EVAP canister vent shut valve.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Idle Control System Rpm Lower Than Expected - Communication Diagram. Scheme 205

Idle Control System RPM - Graph. Scheme 206

The actual idle speed is at least 100 rpm less than the target idle speed for at least 20 seconds.

1. Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on.
2. Let the engine idle for at least 20 seconds.

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Idle Control System RPM - Graph. Scheme 207

The actual idle speed is at least 200 rpm greater than the target idle speed for at least 20 seconds.

1. Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on.
2. Let the engine idle for at least 20 seconds.

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Engine Control Module (ECM) Power Source Unexpected Voltage - Circuit Diagram. Scheme 208

The ECM operates for at least 5 seconds after the ignition switch is turned OFF.

When a malfunction is detected, the DTC and the freeze frame data are stored in the ECM memory. The MIL does not come on.

One of these communication abnormality judgment limits is exceeded.

1. Abnormality judgment number when 1 byte is received: 2500 times or more.
2. Abnormality judgment number when 1 frame is received: 500 times or more.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Engine Control Module (ECM) Programming Error. Scheme 209

The ECM program update is stopped before it is finished for at most 1 second.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Engine Control Module (ECM) Internal Control Module Keep Alive Memory (KAM) Error - Communication Diagram. Scheme 210

A malfunction is detected whenever the keep alive data retrieval and writing process is not completed normally.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Engine Control Module (ECM) Processor Malfunction - Communication Diagram. Scheme 211

One of these conditions must be met for at least 5 seconds.

1. No signal from the digital knock system CPU is detected.
2. Signal from the digital knock system CPU is detected to be abnormal.

Start the engine, let it idle for at least 30 seconds or hold the engine speed to at least 1,000 rpm.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

VIN Not Programmed Or Mismatch - Communication Diagram. Scheme 212

The VIN is not registered in the keep-alive memory in the ECM.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

When the VIN registration is completed, MIL is cleared.

Engine Control Module (ECM) Power Control Circuit/Internal Circuit Malfunction - Circuit Diagram. Scheme 213

The ECM is shut down without the normal shut down procedure.

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive drive cycles in which the engine conditions are similar to the first time the malfunction was detected.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Output Shaft (Countershaft) Speed Sensor Malfunction - Circuit Diagram. Scheme 214

No signal from the output shaft (countershaft) speed sensor is detected for at least 5 seconds.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Barometric Pressure (BARO) Sensor Circuit Out of Range-High - Circuit Diagram. Scheme 215

Barometric Pressure (BARO) Sensor Voltage - Graph. Scheme 216

The BARO sensor output voltage is between 3.59 V to 4.49 V for at least 2 seconds.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

A malfunction is detected if these three conditions are not present after the engine and the ignition switch have been off for at least 6 hours before restarting the engine.

1. When the temperature (IAT minus ECT1) is not 63°F (35°C) or less.
2. When the temperature (IAT minus ECT2) is not 46°F (26°C) or less.
3. When the temperature (ECT2 minus ECT1) is not 84°F (47°C) or less.

1. Turn the ignition off, and wait at least 6 hours.
2. Start the engine, and let it idle for at least 10 seconds.

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Manifold Absolute Pressure (MAP) Sensor Signal Lower Than Expected - Graph. Scheme 217

1. The MAP sensor output is 36 kPa (10.9 in.Hg, 277 mmHg) or less for at least 2 seconds when atmospheric pressure is 61 kPa (18.1 in.Hg, 460 mmHg).
2. The MAP sensor output is 53 kPa (15.9 in.Hg, 405 mmHg) or less for at least 2 seconds when atmospheric pressure is 103 kPa (30.5 in.Hg, 776 mmHg).

1. Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on.
2. Drive the vehicle at a speed of 15 mph (24 km/h) or more with a throttle position as specified under Enable Conditions for at least 2 seconds.

1. Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Manifold Absolute Pressure (MAP) Sensor Signal Higher Than Expected - Graph. Scheme 218

The MAP sensor output is 37 kPa (10.9 in.Hg, 277 mmHg) or more for at least 2 seconds.

Driving Pattern - Graph. Scheme 219

1. Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on.
2. Drive the vehicle at a steady speed between 55 - 75 mph (88 - 120 km/h) for at least 10 seconds.
3. Then, decelerate with the throttle valve fully closed for at least 2 seconds.

1. Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

The A/F sensor (sensor 1) heater element resistance is 250 ohms or more for at least 5 seconds.

Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on, then let it idle.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Air/Fuel Ratio (A/F) Sensor Voltage - Graph. Scheme 220

A malfunction is detected when the A/F sensor output voltage is 4.9 V or more.

Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on, then let it idle.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Electrical Load Detector (ELD) Circuit Diagram. Scheme 221

The ELD output voltage is 0.27 V or less for at least 5 seconds.

When a malfunction is detected, the DTC and the freeze frame data are stored in the ECM memory. The MIL does not come on.

The ELD output voltage is 4.57 V or more for at least 5 seconds.

When a malfunction is detected, the DTC and the freeze frame data are stored in the ECM memory. The MIL does not come on.

1. The FTP sensor output fluctuates by 0.7 kPa (0.2 in.Hg, 5 mmHg) or more, or -0.7 kPa (-0.2 in.Hg, -5 mmHg) or less, for at least 3 seconds.
2. The FTP sensor output value is -1.3 kPa (-0.3 in.Hg, -10 mmHg) or less for at least 3 seconds.

Do the EVAP CVS ON in the INSPECTION MENU with the HDS.

Start the engine, and let it idle until the radiator fan comes on.

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Throttle Valve Default Position - Graph. Scheme 222

The throttle valve is at a position greater than +5° from the fully closed position, or at a position lower than +3° from the fully closed position, for at least 2.5 seconds.

1. Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on.
2. Turn the ignition switch OFF.
3. Turn the ignition switch ON.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Throttle Valve Default Position - Graph. Scheme 223

The throttle valve opening angle is 17° or more, or 11° or less, for at least 2.5 seconds.

1. Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on.
2. Turn the ignition switch OFF.
3. Turn the ignition switch ON.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Throttle Actuator System Malfunction - Communication Diagram. Scheme 224

One of the conditions in this table must be met for at least 0.25 seconds* (0.5 seconds**).

MALFUNCTION THRESHOLD CHART

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Throttle Actuator Control Module Problem - Communication Diagram. Scheme 225

One of these conditions must be met for at least 0.2 seconds.

1. Data read from the ROM is abnormal.
2. Data read from the RAM is abnormal.
3. The A/D converter standard voltage is not a set value.
4. The serial signals between the ECM and the throttle actuator control module do not agree.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

The current flow to the throttle actuator is 16 A or more for at least 0.2 second.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Accelerator Pedal Position (APP) Sensor A (Throttle Position (TP) Sensor D) Circuit Diagram. Scheme 226

The APP sensor A output voltage is 0.1 V or less for at least 0.2 seconds.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

The APP sensor A output voltage is 4.85 V or more for at least 0.2 seconds.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

The APP sensor B output voltage is 0.1 V or less for at least 0.2 seconds.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

The APP sensor B output voltage is 4.0 V or more for at least 0.2 seconds.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Throttle Position (TP) Sensor Voltage - Graph. Scheme 227

One of these conditions must be met for at least 0.2 second.

1. The difference between the TP sensor A voltage and the TP sensor B voltage is 200 mV (5°) or less.
2. The difference between the throttle valve positions that TP sensor A and TP sensor B determined exceeds the value shown in this table.

MALFUNCTION THRESHOLD CHART

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Accelerator Pedal Position (APP) Sensor Voltage - Graph. Scheme 228

One of these conditions must be met for at least 0.3 seconds.

1. If the APP sensor B voltage exceeds the range from 0 V or less to 0.361 V or more when the APP sensor A voltage is 0.361 V.
2. If the APP sensor B voltage exceeds the range from 2.319 V or less to 2.681 V or more when the APP sensor A voltage is 4.995 V.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Identifying Throttle Actuator Control System Idle Position. Scheme 229

One of these conditions must be met for at least 0.7 seconds.

1. The registration of the throttle valve fully closed position is not completed within a predetermined time after the ignition switch is turned ON.
2. The registered value of the throttle valve fully closed position is 0.74 V* 1 , 1.61 V* 2 , or more, or 0.49 V* 1 , 1.37 V* 2 , or less.

*1: TP sensor A

*2: TP sensor B

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

A malfunction is detected if these three conditions are not present after the engine and the ignition switch have been off for at least 6 hours before restarting the engine.

1. When the temperature (IAT minus ECT1) is not 63°F (35°C) or less.
2. When the temperature (IAT minus ECT2) is not 46°F (26°C) or less.
3. When the temperature (ECT2 minus ECT1) is not 84°F (47°C) or less.

1. Turn the ignition off, and wait at least 6 hours.
2. Start the engine, and let it idle for at least 10 seconds.

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Engine Coolant Temperature (ECT) Sensor 2 Circuit - Circuit Diagram. Scheme 230

Engine Coolant Temperature Sensor Voltage - Graph. Scheme 231

The ECT sensor 2 output voltage is 0.08 V or less for at least 2 seconds.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

The ECT sensor 2 output voltage is 4.92 V or more for at least 2 seconds.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Air/Fuel Ratio (A/F) Sensor (Sensor 1) Signal Stuck Lean Malfunction. Scheme 232

A/F sensor output voltage is 3.67 V or more for at least 7 seconds.

Start the engine, then let it idle for at least 2 minutes.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Barometric Pressure (BARO) Sensor Throttle Position - Graph. Scheme 233

The difference between the BARO sensor output and the MAP sensor output is 38 kPa (11.2 in.Hg, 284 mmHg) or more for at least 2 seconds.

1. Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on.
2. Drive the vehicle with the throttle position as specified under Enable Conditions for at least 2 seconds. Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

The BARO sensor output voltage is 1.58 V or less for at least 2 seconds.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

The BARO sensor output voltage is 4.49 V or more for at least 2 seconds.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

The AFS+ terminal voltage is 0.4 V or less for at least 5 seconds.

Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on, then let it idle for 2 minutes.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

The AFS-terminal voltage is 0.4 V or less for at least 5 seconds.

Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on, then let it idle for 2 minutes.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Air Fuel Ratio - Graph. Scheme 234

The secondary HO2S output voltage is 0.65 V or less.

1. Start the engine. Let it idle until the radiator fan comes on.
2. Drive the vehicle at a steady speed of 35 mph (57 km/h) or more for at least 22.5 seconds. Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

The secondary HO2S output voltage is 0.293 V or more.

1. Start the engine. Let it idle until the radiator fan comes on.
2. Drive the vehicle at a steady speed of 35 mph (57 km/h) or more for at least 22.5 seconds. Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Intake Air System - Flow Diagram. Scheme 235

Estimated Volume Of Air - Graph. Scheme 236

One of these conditions is met.

1. The estimated volume of intake air is 350 l/min (369.9 US qt/min, 308.0 lmp qt/min) or more when the MAP value is 41 kPa (12.2 in.Hg, 310 mmHg).
2. The estimated volume of intake air is 350 l/min (369.9 US qt/min, 308.0 lmp qt/min) or more when the MAP value is 27 kPa (8.2 in.Hg, 210 mmHg).

1. Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on.
2. Let the engine idle for at least 22 seconds.

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

FTP Sensor Output And Purge Flow - Diagram. Scheme 237

The output from the fuel tank pressure sensor is -6 kPa (-1.6 in.Hg, -40 mmHg) or less for at least 3.04 seconds.

Do the EVAP CVS ON in the INSPECTION MENU with the HDS.

Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on, then let it idle.

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

The serial signal is input from the throttle actuator control module for at least 2.0 seconds after the ETCS control relay is turned OFF.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Engine Control Module (ECM) Ignition Off Internal Timer Malfunction. Scheme 238

The access process to the ignition off timer fails, or a malfunction is found in the read data for at least 10 seconds.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Rocker Arm Oil Pressure Switch (VTEC Oil Pressure Switch) Circuit Diagram. Scheme 239

ADVANCED DIAGNOSTICS REFERENCE

When the rocker arm oil control solenoid (VTEC solenoid valve) is ON, the rocker arm oil pressure switch (VTEC oil pressure switch) remains ON.

Do the VTEC TEST in the INSPECTION MENU with the HDS.

1. Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on.
2. Drive the vehicle in a lower gear at 4,000 rpm or more with a MAP value of 55 kPa (16.2 in.Hg, 411 mmHg) or more for at least 7 seconds. Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Low lift cam operation

When the rocker arm oil control solenoid (VTEC solenoid valve) is OFF, the rocker arm oil pressure switch (VTEC oil pressure switch) remains OFF.

Do the VTEC TEST in the INSPECTION MENU with the HDS.

Start the engine, and let it idle for at least 7 seconds.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

Rocker Arm Oil Control Solenoid (VTEC Solenoid Valve) Circuit Diagram. Scheme 240

The return signal is OFF (low) for at least 1.1 seconds when the ECM outputs the ON (high) signal to the rocker arm oil control solenoid (VTEC solenoid valve).

1. Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on.
2. Drive the vehicle in a lower gear at 4,000 rpm or more with a manifold absolute pressure (MAP) value of 55 kPa (16.2 in.Hg, 411 mmHg) or more for at least 7 seconds. Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

The return signal is ON (high) for at least 1.1 seconds when the ECM outputs the OFF (low) signal to the rocker arm oil control solenoid (VTEC solenoid valve).

Start the engine, and let it idle for at least 7 seconds.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

A/F Sensor Voltage - Graph. Scheme 241

The A/F sensor output voltage is 3.0 V or less, or 4.8 V or more.

Driving Pattern - Graph. Scheme 242

1. Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on.
2. Drive the vehicle at a speed between 25 - 55 mph (40 - 88 km/h) for at least 5 minutes.
3. Then, drive immediately at a steady speed between 55 - 75 mph (88 - 120 km/h) for at least 10 seconds.
4. Decelerate with the throttle valve fully closed for at least 4 seconds. If the EVAP monitor runs instead of the HO2S monitor, turn the engine off, then restart it, and the HO2S monitor will restart. Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, the Temporary DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

One of these conditions must be met for at least 0.25 second.

1. No serial signals from the throttle actuator control module are detected.
2. The serial signals from the throttle actuator control module are abnormal.

When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.

F-CAN Malfunction (ECM-VSA) - Circuit Diagram. Scheme 243

The ECM does not receive any signals for at least 1 second.

When a malfunction is detected, the DTC and the freeze frame data are stored in the ECM memory. The MIL does not come on.

When the ECM does not receive any signals for at least 1 second.

When a malfunction is detected, the DTC and the freeze frame data are stored in the ECM memory. The MIL does not come on.