NO.9 FAST IDLE/RUNS ON [WL-C, WE-C]

9	RUNS IDLE/RUNS ON
DESCRIPTION	• Engine speed continues at fast idle after warm-up. • Engine runs after the engine switch is turned off.
POSSIBLE CAUSE	• ECT sensor or related circuit malfunction • Accelerator pedal position (APP) sensor or related circuit malfunction • Fuel injector malfunction • Vacuum leakage • Improper engine oil level Warning The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: • Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. • Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injury or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete “BEFORE REPAIR PROCEDURE” and “AFTER REPAIR PROCEDURE” described in this manual.

RUNS IDLE/RUNS ON

DESCRIPTION

• Engine speed continues at fast idle after warm-up.

• Engine runs after the engine switch is turned off.

POSSIBLE CAUSE

• ECT sensor or related circuit malfunction

• Accelerator pedal position (APP) sensor or related circuit malfunction

• Fuel injector malfunction

• Vacuum leakage

• Improper engine oil level

Warning

The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services:

• Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel.

• Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injury or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete “BEFORE REPAIR PROCEDURE” and “AFTER REPAIR PROCEDURE” described in this manual.

STEP	INSPECTION	RESULTS	ACTION
1	Verify the following: ― Proper dipstick ― Engine oil level Are all item normal?	Yes	Go to the next step.
No	Service if necessary. Repeat Step 1.
2	Connect the M-MDS to the DLC-2. Access the ECT PID. Start and warm-up the engine to normal operating temperature. Is the ECT PID reading between 82—112 °C {180—233 °F}?	Yes	Go to the next step.
No	ECT PID is higher than 112 °C{233 °F}: Go to the symptom troubleshooting “NO.17 COOLING SYSTEM CONCERNS‐OVERHEATING [WL-C, WE-C]”. ECT PID is less than 82 °C{180 °F}: Go to the symptom troubleshooting “NO.18 COOLING SYSTEM CONCERNS‐RUNS COLD [WL-C, WE-C]”.
3	Perform the self-test function using the M-MDS. Turn the engine switch to the ON position (Engine off). Retrieve any DTCs. Are any DTCs displayed?	Yes	DTC is displayed: Go to the appropriate DTC test. (See DTC TABLE [WL-C, WE-C (Thailand, General (L.H.D. R.H.D.) specs.)].) Communication error message is displayed: Inspect the following: • Open circuit between main relay and PCM terminal 201, 203, 205 • Open circuit main relay and PCM terminal 219 • Main relay stuck open • Open or poor ground circuit (PCM terminal 202, 204, 206) • Poor connection to vehicle body ground
No	No DTC is displayed: Go to the next step.
4	Inspect the fuel injector. (See FUEL INJECTOR INSPECTION [WL-C, WE-C].) Is the fuel injector normal?	Yes	Go to the next step.
No	Replace the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [WL-C, WE-C].)
5	Inspect the APP sensor. (See ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION [WL-C, WE-C].) Is the APP sensor normal?	Yes	Inspect the vacuum leakage.
No	Replace the accelerator component.
6	Verify test results. • If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [WL-C, WE-C].) • If the malfunction remains, inspect the related Service Information and perform repair or diagnosis. ― If the vehicle is repaired, troubleshooting completed. ― If the vehicle is not repaired or additional diagnostic information is not available, reprogram the PCM if later calibration is available. Retest.

STEP

INSPECTION

RESULTS

ACTION

Verify the following:

― Proper dipstick

― Engine oil level

Are all item normal?

Yes

Go to the next step.

Service if necessary.

Repeat Step 1.

Connect the M-MDS to the DLC-2.

Access the ECT PID.

Start and warm-up the engine to normal operating temperature.

Is the ECT PID reading between 82—112 °C {180—233 °F}?

Yes

Go to the next step.

ECT PID is higher than 112 °C{233 °F}:

Go to the symptom troubleshooting “NO.17 COOLING SYSTEM CONCERNS‐OVERHEATING [WL-C, WE-C]”.

ECT PID is less than 82 °C{180 °F}:

Go to the symptom troubleshooting “NO.18 COOLING SYSTEM CONCERNS‐RUNS COLD [WL-C, WE-C]”.

Perform the self-test function using the M-MDS.

Turn the engine switch to the ON position (Engine off).

Retrieve any DTCs.

Are any DTCs displayed?

Yes

DTC is displayed:

Go to the appropriate DTC test.

(See DTC TABLE [WL-C, WE-C (Thailand, General (L.H.D. R.H.D.) specs.)].)

Communication error message is displayed:

Inspect the following:

• Open circuit between main relay and PCM terminal 201, 203, 205

• Open circuit main relay and PCM terminal 219

• Main relay stuck open

• Open or poor ground circuit (PCM terminal 202, 204, 206)

• Poor connection to vehicle body ground

No DTC is displayed:

Go to the next step.

Inspect the fuel injector.

(See FUEL INJECTOR INSPECTION [WL-C, WE-C].)

Is the fuel injector normal?

Yes

Go to the next step.

Replace the fuel injector.

(See FUEL INJECTOR REMOVAL/INSTALLATION [WL-C, WE-C].)

Inspect the APP sensor.

(See ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION [WL-C, WE-C].)

Is the APP sensor normal?

Yes

Inspect the vacuum leakage.

Replace the accelerator component.

Verify test results.

• If normal, return to the diagnostic index to service any additional symptoms.

(See SYMPTOM DIAGNOSTIC INDEX [WL-C, WE-C].)

• If the malfunction remains, inspect the related Service Information and perform repair or diagnosis.

― If the vehicle is repaired, troubleshooting completed.

― If the vehicle is not repaired or additional diagnostic information is not available, reprogram the PCM if later calibration is available. Retest.