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NO.5 ENGINE STALLS-AFTER START/AT IDLE [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513)

BME010300103210

5 | Engine stalls-after start/at idle
DESCRIPTION | • Engine stops unexpectedly.
POSSIBLE CAUSE | • A/C system operation is improper • Air leakage from intake-air system parts • Purge solenoid valve malfunction • Improper operation of IAC valve • EGR valve malfunction
• No signal from CKP sensor due to sensor or related wiring harness
• Vacuum leakage
• Low engine compression
• Spark leakage from high-tension leads
• Poor fuel quality
• PCV valve malfunction
• Air cleaner restriction
• Restriction in exhaust system
• Electrical connector disconnection
• Open or short circuit in fuel pump body and related harness
• No battery power supply to PCM or poor GND
• Inadequate fuel pressure
• Fuel pump body mechanical malfunction
• Fuel leakage from fuel injector
• Fuel injector clogging
• Immobilizer system and/or circuit malfunction

  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 injuries 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 manual.
  (See BEFORE SERVICE PRECAUTION [AJ].)
  (See AFTER SERVICE PRECAUTION [AJ].)

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 |

  Note

  • Following test should be performed on vehicles with immobilizer system. Go to Step 12 for vehicles without immobilizer system.

• Connect the WDS or equivalent to the DLC-2.
• Do the following conditions appear?

  - The engine is not completely started.
  - DTC P1624 is displayed.

Yes
Both conditions appear:
• Go to Step 4.
No | Either or other condition appear: • Go to the next step.
2 | • Does the engine stall after approx. 2 s since the engine is started? | Yes | Go to the next step.
No | The immobilizer system is normal. Go to Step 12.
3 | • Is the immobilizer control module connector securely connected to the immobilizer control module? | Yes | Go to the next step.
No | Connect the immobilizer control module connector securely. Return to Step 2.
4 | • Does the immobilizer indicator light flash and indicate any of the following immobilizer system DTCs? DTC 01, 02, 03, 11, 21 | Yes | Go to "ON-BOARD DIAGNOSTIC FUNCTION" of the immobilizer system.
No | Go to the next step.
5 | • Does the immobilizer indicator light illuminate? | Yes | Go to Step 8.
No | Go to the next step.
6 | • Does the immobilizer indicator light flash and indicate the following immobilizer system DTC after above 135 s after the ignition switch is turned to the ON position? DTC 24, 30 | Yes | Go to "ON-BOARD DIAGNOSTIC FUNCTION" of the immobilizer system.
No | Go to the next step.
7 | • Turn the ignition switch off. • Disconnect the immobilizer control module connector. • Connect a jumper wire between immobilizer control module connector terminal M and GND. • Turn the ignition switch to the ON position (Engine off). • Does the immobilizer indicator light illuminate? | Yes | Reconnect the immobilizer control module connector. Go to the next step.
No | Inspect for open circuit between immobilizer control module connector terminal M and instrument cluster. • If normal, inspect the immobilizer indicator light bulb. Repair or replace if necessary. Reconnect the immobilizer control module connector, then return to Step 4.
8 | • Connect the WDS or equivalent to the DLC-2 and retrieve DTC. • Is the following DTC displayed? DTC P1602, P1603, P1604, P1621, P1622, P1624 | Yes | Go to the applicable DTC inspection. (See DTC TABLE [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513).)
No | Go to the next step.
9 | • Is there continuity between PCM ground terminals 24/51/76/77/103 and GND? | Yes | Go to the next step.
No | Repair or replace the wiring harness.
10 | • Turn the ignition switch to the ON position (Engine off). • Measure the voltage between PCM terminals 71 and 97. • Is the voltage above 11.5 V? | Yes | Go to the next step.
No | Repair or replace the wiring harness.
11 | • Disconnect the immobilizer control module connector. • Turn the ignition switch to the ON position (Engine off). • Is there battery voltage at immobilizer control module connector terminal J? | Yes | Inspect for open circuit between PCM connector terminal 59 and immobilizer control module connector terminal A.
No | Repair or replace the wiring harness between immobilizer control module connector terminal J and fuse panel.
12 | • Verify the following:

  - Vacuum connection
  - Air cleaner element
  - No air leakage from intake-air system
  - No restriction of intake-air system
  - Proper sealing of intake manifold and components attached to intake manifold: EGR valve, IAC valve
  - Ignition wiring
  - Fuel quality: proper octane, contamination, winter/summer blend
  - Electrical connections
  - Smooth operation of throttle valve

• Are all items normal?
Yes
Go to the next step.
No | Service if necessary. Repeat Step 12.
13 | • Turn the ignition switch to the ON position (Engine off). • Disconnect the TP sensor connector. • Measure the voltage at TP sensor connector VREF terminal with the ignition switch at the ON position. Voltage 4.5-5.5 V
• Is the voltage normal?
Yes
Go to the next step.
No | Go to the troubleshooting "No.30 Constant voltage".
14 | • Connect the WDS or equivalent to the DLC-2. • Turn the ignition switch to the ON position (Engine off). • Retrieve any DTCs. • Is "PASSED" displayed? | Yes | No DTC is displayed: • Go to the next step.
No | DTC is displayed: • Go to the applicable DTC inspection. (See DTC TABLE [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513).) Communication error message is displayed: • Inspect for the following:

  - Open circuit between main relay and PCM terminal 71 or 97
  - Open main relay GND circuit
  - Main relay is stuck open.
  - Open or poor GND circuit (PCM terminal 24, 51, 76, 77 or 103)
  - Poor connection of vehicle body GND

15 | • Attempt to start the engine at part throttle. • Does the engine run smoothly at part throttle? | Yes | Inspect the IAC valve and the wiring harness.
No | Go to the next step.
16 | • Connect the WDS or equivalent to the DLC-2. • Access RPM PID. • Is RPM PID indicating engine speed during the engine cranking? | Yes | Go to the next step.
No | Inspect for the following: • Open or short circuit in CKP sensor • Open or short circuit between CKP sensor and PCM terminal 21 or 22 • Open or short circuit in CKP sensor harnesses

  - If the CKP sensor and the wiring harness are normal, go to the next step.

17 | • Visually inspect the CKP sensor and teeth of the crankshaft pulley. • Are the CKP sensor and teeth of the crankshaft pulley normal? | Yes | Go to the next step.
No | Replace the malfunctioning part.
18 | • Inspect the ignition coils. • Are the ignition coils normal? | Yes | Repair or replace ignition coil.
No | Go to the next step.
19 | • Is strong blue spark visible at each disconnected ignition coil while cranking engine? | Yes | Go to the next step. • If symptom occurs with A/C on, go to Step 15.
No | Inspect for the following: • Open or short circuit in ignition coil • Open circuit between ignition switch and ignition coil • Open circuit between ignition coil and PCM terminal 1, 26, 27, 52, 78 or 82
20 | • Inspect spark plug conditions. • Is spark plug wet, covered with carbon or grayish white? | Yes | Spark plug is wet or covered with carbon: • Inspect for fuel leakage from the fuel injector. Spark plug is grayish white: • Inspect for clogged fuel injector.
No | Install the spark plugs on original cylinders. Go to the next step.
21 | • Remove and shake the PCV valve. • Does the PCV valve rattle? | Yes | Go to the next step.
No | Replace the PCV valve.
22 | • Inspect for restriction in the exhaust system. • Is there any restriction? | Yes | Inspect exhaust system.
No | Go to the next step.
23 | • Install a fuel pressure gauge between the fuel filter and the fuel distributor. • Connect a jumper wire between F/P terminal at the DLC in engine compartment and GND. • Turn the ignition switch to the ON position (Engine off). • Is fuel line pressure correct with the ignition switch at the ON position?
(See FUEL LINE PRESSURE INSPECTION [AJ])
Yes
Go to the next step.
No | Zero or low: • Inspect fuel pump circuit. • Inspect for open fuel pump relief valve. • Inspect for fuel leakage inside pressure regulator. • Inspect for clogged main fuel line. High:
• Inspect pressure regulator for high pressure cause.
• Inspect for clogged fuel return line.
24 | • Visually inspect for fuel leakage at the fuel injector O-ring and fuel line. • Service if necessary. • Does fuel line pressure hold after the ignition switch is turned off? | Yes | Go to the next step.
No | Inspect the pressure regulator diaphragm condition. • If condition is normal, inspect fuel injector. • If condition is not normal, replace pressure regulator.
25 |

  Note

  • The following test is for stall concerns with A/C on. If other symptoms exist, go to the next step.

• Connect a pressure gauges to A/C low and high pressure side lines.
• Turn the A/C on and measure low side and high side pressure.
• Are pressures within the specifications?
Yes
Go to the next step.
No | If A/C is always on, go to symptom troubleshooting "No.24 A/C always on/A/C compressor runs continuously". (See NO.24 A/C ALWAYS ON/A/C COMPRESSOR RUNS CONTINUOUSLY [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513).)
For other symptoms, inspect the following:
• Refrigerant charging amount
• Condenser fan operation
26 | • Disconnect vacuum hose between the purge solenoid valve and the intake manifold from purge solenoid side. • Plug opening end of vacuum hose. • Start the engine. • Is the engine stall now eliminated? | Yes | Inspect if the purge solenoid valve is stuck open. Inspect the EVAP control system.
No | Go to the next step.
27 | • Is air leakage felt or heard at intake-air system components while racing the engine to higher speed? | Yes | Repair or replace the malfunctioning part.
No | Go to the next step.
28 | • Inspect the engine condition while tapping the EGR valve housing. • Does engine condition improve? | Yes | Replace the EGR valve.
No | Go to the next step.
29 | • Is the engine compression correct? | Yes | Inspect the valve timing.
No | Inspect for cause.
30 | • Verify test results.

  - If normal, return to diagnostic index to service any additional symptoms.
  - If malfunction remains, inspect related Service Information and perform repair or diagnosis.

  • If vehicle is repaired, troubleshooting completed.
  • If vehicle is not repaired or additional diagnostic information is not available, replace or reprogram the PCM.