NO.9 FAST IDLE/RUNS ON [ZJ, ZY, Z6]
id0103b1801500
Without Throttle Valve Actuator
|
9 |
FAST IDLE/RUNS ON |
|---|---|
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DESCRIPTION
|
• The engine speed continues during at fast idle after warm-up.
• The engine runs after the ignition switch is off.
|
|
POSSIBLE CAUSE
|
• ECT sensor malfunction
• Air leakage from intake-air system
• Throttle body malfunction
• Accelerator cable free play misadjustment
• Improper load signal input
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Diagnostic procedure
|
STEP |
INSPECTION |
RESULTS |
ACTION |
|---|---|---|---|
|
1
|
Connect the M-MDS to the DLC-2.
Access ECT PID.
Start and warm-up the engine to normal operating temperature.
Is ECT PID between 82—112°C {180—234°F}?
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Yes
|
Go to the next step.
|
|
No
|
ECT PID is more than 112°C {234°F}:
Go to symptom troubleshooting "No.17 Cooling system concerns - Overheating".
ECT PID is less than 82°C {180°F}:
Go to symptom troubleshooting "No.18 Cooling system concerns - Runs cold".
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||
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2
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Connect the M-MDS to the DLC-2.
Retrieve any continuous memory DTCs.
Are there any DTCs displayed?
|
Yes
|
DTC is displayed:
Go to the appropriate DTC inspection.
(See DTC TABLE[ZJ, ZY, Z6].)
|
|
No
|
No DTC is displayed:
Go to the next step.
|
||
|
3
|
Connect the M-MDS to the DLC-2.
Access AC_REQ, CPP, CPP/PNP, TR and PSP PIDs.
Monitor each PID.
(See PCM INSPECTION[ZJ, ZY, Z6].)
Are PIDs normal?
|
Yes
|
Go to the next step.
|
|
No
|
AC_REQ PID:
Inspect the A/C switch, refrigerant pressure switch and fan switch.
CPP PID:
Inspect the clutch pedal position switch (MTX).
CPP/PNP PID:
Inspect the neutral switch (MTX).
TR PID:
Inspect the TR switch (ATX).
PSP PID:
Inspect the PSP switch.
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||
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4
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Is there air leakage felt or heard at the intake-air system components while racing the engine to higher speed?
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Yes
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Repair or replace part if necessary.
|
|
No
|
Verify accelerator cable free play.
|
||
|
5
|
Verify test results.
• If normal, return to diagnostic index to service any additional symptoms.
• If malfunction remains, inspect related Service information perform repair or diagnosis.
|
||
With Throttle Valve Actuator
|
9 |
FAST IDLE/RUNS ON |
|---|---|
|
DESCRIPTION
|
• The engine speed continues during at fast idle after warm-up.
• The engine runs after the ignition switch is off.
|
|
POSSIBLE CAUSE
|
• ECT sensor malfunction
• Air leakage from intake-air system
• Throttle body malfunction
• Accelerator pedal position sensor misadjustment
• Improper operation of electronic throttle control system
• Improper load signal input
|
Diagnostic procedure
|
STEP |
INSPECTION |
RESULTS |
ACTION |
|---|---|---|---|
|
1
|
Connect the M-MDS to the DLC-2.
Access ECT PID.
Start and warm-up the engine to normal operating temperature.
Is ECT PID between 82—112°C {180—234°F}?
|
Yes
|
Go to the next step.
|
|
No
|
ECT PID is more than 112°C {234°F}:
Go to symptom troubleshooting "No.17 Cooling system concerns - Overheating".
ECT PID is less than 82°C {180°F}:
Go to symptom troubleshooting "No.18 Cooling system concerns - Runs cold".
|
||
|
2
|
Connect the M-MDS to the DLC-2.
Retrieve any continuous memory DTCs.
Are there any DTCs displayed?
|
Yes
|
DTC is displayed:
Go to the appropriate DTC inspection.
(See DTC TABLE[ZJ, ZY, Z6].)
|
|
No
|
No DTC is displayed:
Go to the next step.
|
||
|
3
|
Connect the M-MDS to the DLC-2.
Access AC_REQ, CPP, CPP/PNP, TR and PSP PIDs.
Monitor each PID.
(See PCM INSPECTION[ZJ, ZY, Z6].)
Are PIDs normal?
|
Yes
|
Go to the next step.
|
|
No
|
AC_REQ PID:
Inspect the A/C switch, refrigerant pressure switch and fan switch.
CPP PID:
Inspect the clutch pedal position switch (MTX).
CPP/PNP PID:
Inspect the neutral switch (MTX).
TR PID:
Inspect the TR switch (ATX).
|
||
|
4
|
Is there air leakage felt or heard at the intake-air system components while racing the engine to higher speed?
|
Yes
|
Repair or replace part if necessary.
|
|
No
|
Verify accelerator cable free play.
|
||
|
5
|
Verify test results.
• If normal, return to diagnostic index to service any additional symptoms.
• If malfunction remains, inspect related Service information perform repair or diagnosis.
|
||