Electronic Throttle Control System Inspection
Electronic Throttle Control System InspectionEngine coolant temperature compensation inspection
1. Connect the M-MDS to the DLC-2.
2. Access the following PIDs:
- ECT
- IAT
- RPM
3. Verify that the engine is cold, then start the engine.
4. Verify that the engine speed decreases as the engine warms up.
- If the engine speed does not decrease or decreases slowly, inspect the following:
- ECT sensor and related wiring harness (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTIONtL3]).
- Electronic throttle body and related wiring harness (See THROTTLE BODY INSPECTIONfL3].)
Load compensation inspection
1. Start the engine and idle it.
2. Connect the M-MDS to the DLC-2.
3. Verify that P0506, P0507, or P0511 is not displayed.
- If P0506, P0507 or P0511 are displayed, perform DTC inspection. (See DTC TABLE[L3].) Diagnostic Trouble Code Descriptions
4. Access the RPM PID.
NOTE: Excludes temporary idle speed drop just after the loads are turned on.
Engine Speed:
5. Verify that the engine speed is within the specification under each load condition.
- If load condition is not as specified, inspect the following:
- A/C switch and related wiring harness (See CLIMATE CONTROL UNIT INSPECTION[FULL-AUTO AIR CONDITIONER].) (See CLIMATE CONTROL UNIT INSPECTION[MANUAL AIR CONDITIONER].)
- Fan switch and related wiring harness (See CLIMATE CONTROL UNIT INSPECTION[FULL-AUTO AIR CONDITIONER].) (See CLIMATE CONTROL UNIT INSPECTION[MANUAL AIR CONDITIONER].)
Throttle position (TP) sweep inspection
1. Connect the M-MDS to the DLC-2.
2. Turn the ignition switch to the ON position.
3. Verify that none of the following DTC are displayed:
- P0122, P0123, P0222, P0223, P0638, P2100, P2101, P2102, P2103, P2107, P2108, P2119, P2122, P2123, P2127, P2128, P2135, P2138
- If any one DTC is displayed, perform DTC inspection.
4. Access TP_REL PID.
5. Verify that the PID reading is within the CTP value. (See O1 -40-6 PCM INSPECTION[L3]). PCM Inspection
- If the PID reading is out of range, perform the following:
- Remove the air duct from the throttle valve body.
- Verify that the throttle valve opens when the accelerator pedal is depressed.
- If the throttle valve opens, inspect the throttle position sensor and related wiring harness.
- If the throttle valve does not open, inspect the throttle actuator control motor and related wiring harness.
6. Gradually depress the throttle pedal and verify that the PID reading increases accordingly.
- If the PID reading drops momentarily, inspect the following:
- Throttle position sensor
7. Fully depress the throttle pedal and verify that the PID reading is within WOT value. (See PCM INSPECTION[L3]). PCM Inspection
- If the PID reading is out of range, perform the followings:
- Remove the air duct from throttle valve body.
- Verify that the throttle valve opens when throttle pedal is depressed.
- If the throttle valve opens, inspect the throttle position sensor and related wiring harness.
- If the throttle valve does not open, inspect the throttle actuator control motor and related wiring harness.
Variable Intake air Control Operation Inspection
1. Start the engine.
Rod Operation:
2. Inspect the rod operation under the to lowing condition:
- If the rod operation is not as specified, inspect as follows:
1 Stop the engine.
2 Connect the M-MDS to the DLC-2.
3 Verify that DTC P0661 or P0662 is not displayed.
- If DTC P0661 or P0662 is shown, perform DTC inspection. (See DTC TABLE[L3].) Diagnostic Trouble Code Descriptions
4 Inspect the variable intake air solenoid valve. (See VARIABLE INTAKE AIR SOLENOID VALVE INSPECTION[L3].) (See VARIABLE INTAKE AIR SOLENOID VALVE INSPECTION[L3].)
- If the variable intake air solenoid valve is not normal, replace the variable intake air solenoid valve.
- If the variable intake air solenoid valve is normal, inspect the following:
- Vacuum hose and vacuum chamber for looseness or damage
- Shutter valve actuator (See VARIABLE INTAKE AIR SHUTTER VALVE ACTUATOR INSPECTION[L3].)
- Shutter valve stuck open or closed
Variable Tumble Control Operation Inspection
1. Connect the M-MDS to the DLC-2.
2. Access ECT PID.
3. Verify that ECT PID is below 60 °C (140 OF).
4. Start the engine.
Rod Operation:
5. Inspect rod operation under the following conditions:
- If the rod operation is not specified, inspect as follows:
1 Verify that DTC No. P2004, P2006, P2009 or P2010 is not displayed.
- If DTC No. P2004, P2006, P2009 or P2010 are shown, perform DTC inspection. (See DTC TABLE[L3].) Diagnostic Trouble Code Descriptions
Step 1-Step 4:
2 Inspect the variable tumble solenoid valve. (See VARIABLE TUMBLE SOLENOID VALVE INSPECTION[L3].)
- If the variable tumble solenoid valve is not normal, replace the variable tumble solenoid valve.
- If the variable tumble solenoid valve is normal, inspect the following:
- Vacuum hose and vacuum chamber for looseness or damage
- Shutter valve actuator (See VARIABLE TUMBLE SHUTTER VALVE ACTUATOR INSPECTION[L3].)
- Shutter valve stuck open or closed
Fuel Cut Control System Inspection
1 Warm up engine and idle it.
2. Turn off the electrical loads and A/C switch.
3. Connect the M-MDS to the DLC-2.
4. Access RPM PID.
5. Listen for the fuel injector operation sound at all cylinders using the soundscope and monitor both PIDs while performing the following steps:
1 Depress the accelerator pedal and increase the engine speed to 4,000 rpm.
2 Quickly release the accelerator pedal (brake pedal is not depressed) and verify that the fuel injector operation sound stops, and starts again when the engine speed drops below 2,200 rpm.
- If not as specified, inspect the following:
- ECT sensor and related wiring harness (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [L3]).
- Neutral/clutch pedal position switch and related wiring harness (MTX) (See CLUTCH PEDAL POSITION (CPP) SWITCH INSPECTION[L3]). Testing and Inspection
- TR switch and related wiring harness (ATX) (See TRANSAXLE RANGE (TR) SWITCH INSPECTION[FN4A-EL].)
Fuel Pump Operation Inspection
1. Remove the fuel-filler cap.
2. Turn the ignition switch to the ON position.
3. Turn the fuel pump relay from off to on using the FP PID and inspect if the operation sound is heard.
- If no operation sounds is heard, proceed to next step.
4. Measure voltage at wiring harness side fuel pump connector terminal A.
Specification
B+ (Ignition switch at on)
- If the voltage is as specified, inspect the following:
- Fuel pump continuity
- Fuel pump GND
- Wiring harness between fuel pump relay and PCM terminal 1AR (with immobilizer system), 1AO (without immobilizer system)
- If not as specified, inspect the following:
- Fuel pump relay
- Wiring harness connector (Main relay - fuel pump relay - fuel pump.)
Fuel Pump Control System Inspection
1. Crank the engine and verify that fuel pump relay operation sound is heard.
2. If operation sound is not heard, inspect the following:
- Fuel pump relay (See RELAY INSPECTION.)
- Wiring harness and connectors (Main relay - fuel pump relay - PCM terminal 1AR (with immobilizer system), 1AO (without immobilizer system)