NO.10 LOW IDLE/STALLS DURING DECELERATION [LF]
B3E010318881W12
Diagnostic procedure
STEP
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INSPECTION
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RESULTS
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ACTION
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---|---|---|---|
1
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• Does the engine idle rough?
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Yes
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Go to symptom troubleshooting "No.8 Engine runs rough/rolling idle".
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No
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Go to the next step.
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2
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Turn off the A/C switch and fan switch.
Does the A/C magnetic clutch engage?
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Yes
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Go to symptom troubleshooting "No.24 A/C is always on or A/C compressor runs continuously."
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No
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Go to the next step.
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3
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Verify the following:
• Proper routing and no damage of vacuum lines
• IAC valve is connected properly.
• No air leakage from intake-air system
Are all items normal?
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Yes
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Go to the next step.
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No
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Service if necessary.
Repeat Step 3.
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4
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Connect the WDS or equivalent to the DLC-2.
Retrieve any continuous memory, KOEO and KOER DTCs using WDS or equivalent.
Are there any DTCs displayed?
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Yes
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DTC is displayed:
Go to the appropriate DTC inspection.
(See DTC TABLE [LF].)
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No
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No DTC is displayed:
Go to the next step.
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5
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Does the idle speed drop or stall when disconnecting the IAC valve?
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Yes
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Go to the next step.
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No
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Inspect the following:
• Circuit from IAC valve to the PCM terminal 2E or 2F for open and short
• IAC valve for sticking
If normal, go to the next step.
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6
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Disconnect the vacuum hose between the purge solenoid valve and the intake manifold from the purge solenoid valve side.
Plug opening end of vacuum hose.
Drive vehicle.
Does engine condition improve?
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Yes
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Inspect the evaporative emission control system.
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No
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Go to the next step.
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7
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Connect the WDS or equivalent to the DLC-2.
Access following PIDs.
• TP
• MAT
• VSS
• BOO
• CPP (MTX)
• CPP/PNP (MTX)
• TR (ATX)
Monitor each PID while driving the vehicle.
(See PCM INSPECTION [LF].)
Are PIDs normal?
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Yes
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Intermittent concern exists.
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No
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TP PID:
Inspect the TP sensor.
MAF PID:
Inspect the MAF sensor.
VSS PID:
Inspect the VSS.
(See DTC TABLE [LF].)
BOO PID:
Inspect the brake switch.
(See BRAKE SWITCH INSPECTION.)
CPP PID: (MTX)
Inspect the clutch pedal position switch.
CPP/PNP PID: (MTX)
Inspect the neutral switch.
TR PID: (ATX)
Inspect the TR switch.
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8
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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.
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