| 10 |
LOW IDLE/STALLS DURING DECELERATION |
| DESCRIPTION |
- Engine stops unexpectedly at beginning of deceleration or recovery from deceleration.
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| POSSIBLE CAUSE |
- PCM DTC is stored
- Erratic signal to PCM
- APP sensor or related circuit malfunction
- Brake switch or related circuit malfunction
- Neutral switch or related circuit malfunction (MTX)
- Communication error between TCM and PCM (ATX)
- ECT sensor No. 1 or related circuit malfunction
- MAF sensor or related circuit malfunction
- MAP sensor or related circuit malfunction
- A/F sensor or related circuit malfunction
- HO2S or related circuit malfunction
- TP sensor or related circuit malfunction
- Generator malfunction (part, system, control malfunction)
- Amount of generator voltage is large
- Improper air/fuel mixture ratio control
- Improper operation of A/C magnetic clutch
- Improper operation of drive-by-wire control system
- Incorrect fuel injection timing
- Fuel injector malfunction
- Purge solenoid valve malfunction
- Poor fuel quality
- Air leakage from intake-air system
- Vacuum leakage
- Intake-air system restriction
- Fuel leakage
- Engine mount installation loose
- Erratic signal from CKP sensor
- Loose installation
- Damaged trigger wheel (crankshaft pulley)
- Open or short circuit in related wiring harness
- Erratic signal from intake CMP sensor
- Loose installation
- Damaged trigger wheel (intake camshaft)
- Damaged trigger wheel (exhaust camshaft)
- Open or short circuit in related wiring harness
- Inadequate fuel pressure (high or low pressure side)
- Fuel pressure sensor or related circuit malfunction
- High pressure fuel pump malfunction
- Spill valve control solenoid valve control circuit malfunction (damage to driver in PCM caused by short circuit to ground system)
- Spill valve control solenoid valve (built-into high pressure fuel pump) malfunction
- Relief valve (built-into high pressure fuel pump) malfunction
- Fuel line restriction
- Fuel filter clogged (built-into fuel pump unit)
- Fuel pump unit malfunction
- ATX malfunction (ATX)
- Low engine compression
- Improper intake valve timing
- Improper exhaust valve timing
- Improper operation of electric variable valve timing control system
- Electric variable valve timing driver malfunction
- Electric variable valve timing motor malfunction
- Electric variable valve timing actuator malfunction
- Improper operation of hydraulic variable valve timing control system
- Injector driver (built-into PCM) malfunction
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| POSSIBLE CAUSE |
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 SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this Repair Information. (See BEFORE SERVICE PRECAUTION
.) (See AFTER SERVICE PRECAUTION
.)
CAUTION:
- Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to the fuel pipe and quick release connector. Always clean the quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.
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