NO.5 ENGINE STALLS-AFTER START/AT IDLE [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed))

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 wire • Vacuum leakage • Low engine compression • Erratic signal to ignition coil • 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 REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE SERVICE PRECAUTION [AJ].) (See AFTER SERVICE PRECAUTION [AJ].)


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 WDS or equivalent to DLC-2. • Do following conditions appear? - Engine is not completely started. - DTC P1624 is displayed.	Yes	Both conditions appear: • Go to Step 4.
1		No	Either or other condition appear: • Go to next step.
2	• Does engine stall after approx. 2 seconds since engine is started?	Yes	Go to next step.
2		No	Immobilizer system is normal. Go to Step 12.
3	• Is immobilizer unit connector securely connected to immobilizer unit?	Yes	Go to next step.
3		No	Connect immobilizer unit connector securely. Return to Step 2.
4	• Does immobilizer indicator light flash and indicate any of following immobilizer system DTCs? DTC 01, 02, 03, 11, 21	Yes	Go to "ON-BOARD DIAGNOSTIC FUNCTION" of immobilizer system.
4		No	Go to next step.
5	• Does immobilizer indicator light illuminate?	Yes	Go to Step 8.
5	• Does immobilizer indicator light illuminate?	No	Go to next step.
6	• Does immobilizer indicator light flash and indicate following immobilizer system DTC after above 135 seconds after ignition switch is turned to ON? DTC 24, 30	Yes	Go to "ON-BOARD DIAGNOSTIC FUNCTION" of immobilizer system.
6		No	Go to next step.
7	• Turn ignition switch to OFF. • Disconnect immobilizer unit connector. • Connect jumper wire between immobilizer unit connector terminal M and GND. • Turn ignition switch to ON (Engine OFF). • Does immobilizer indicator light illuminate?	Yes	Reconnect immobilizer unit connector. Go to next step.
7		No	Inspect for open circuit between immobilizer unit connector terminal M and instrument cluster. • If normal, inspect immobilizer indicator light bulb. Repair or replace if necessary. Reconnect immobilizer unit connector, then return to Step 4.
8	• Connect WDS or equivalent to DLC-2 and retrieve DTC. • Is following DTC displayed? DTC P1602, P1603, P1604, P1621, P1622, P1624	Yes	Go to appropriate DTC test.
8		No	Go to next step.
9	• Is there continuity between PCM ground terminals 6/22/23/25/100 and GND?	Yes	Go to next step.
9		No	Repair or replace wiring harness.
10	• Turn ignition switch to ON (Engine OFF). • Inspect voltage between PCM terminals 34 and 60. • Is voltage above 11.5 V?	Yes	Go to next step.
10		No	Repair or replace wiring harness.
11	• Disconnect immobilizer unit connector. • Turn ignition switch to ON (Engine OFF). • Is there battery voltage at immobilizer unit connector terminal J?	Yes	Inspect for open circuit between PCM connector terminal 64 and immobilizer unit connector terminal A.
11		No	Repair or replace wiring harness between immobilizer unit connector terminal J and fuse panel.
12	• Verify 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 next step.
12		No	Service as necessary. Repeat Step 12.
13	• Turn ignition switch to ON (Engine OFF). • Disconnect TP sensor connector. • Measure voltage at TP sensor connector VREF terminal with ignition switch at ON. Voltage 4.5-5.5 V • Is voltage normal?	Yes	Go to next step.
13		No	Go to troubleshooting "No.30 Constant voltage".
14	• Connect WDS or equivalent to DLC-2. • Turn ignition switch to ON (Engine OFF). • Retrieve any DTCs. • Is "PASSED" displayed?	Yes	No DTC is displayed: • Go to next step.
14		No	DTC is displayed: • Go to appropriate DTC test. Communication error message is displayed: • Inspect for following: - Open circuit between main relay and PCM terminal 34 or 60 - Open main relay GND circuit - Main relay is stuck open. - Open or poor GND circuit (PCM terminal 6, 22, 23, 25 or 60) - Poor connection of vehicle body GND
15	• Attempt to start engine at part throttle. • Does engine run smoothly at part throttle?	Yes	Inspect IAC valve and wiring harness.
15		No	Go to next step.
16	• Connect WDS or equivalent to DLC-2. • Access RPM PID. • Is RPM PID indicating engine speed during engine cranking?	Yes	Go to next step.
16		No	Inspect for following: • Open or short circuit in CKP sensor • Open or short circuit between CKP sensor and PCM terminal 34 or 60 • Open or short circuit in CKP sensor harnesses - If CKP sensor and harness are normal, go to next step.
17	• Visually inspect CKP sensor and teeth of crankshaft pulley. • Are CKP sensor and teeth of crankshaft pulley normal?	Yes	Go to next step.
17		No	Replace malfunctioning part.
18	• Inspect ignition coils. • Are ignition coils normal?	Yes	Repair or replace ignition coil.
18	• Inspect ignition coils. • Are ignition coils normal?	No	Go to next step.
19	• Is strong blue spark visible at each disconnected ignition coil while cranking engine?	Yes	Go to next step. • If symptom occurs with A/C on, go to Step 15.
19		No	Inspect for following: • Open or short circuit in ignition coil • Open circuit between ignition switch and ignition coil • Open circuit between ignition coil and PCM terminal 52, 78, 101, 102, 103 or 104
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 injector. Spark plug is grayish white: • Inspect for clogged fuel injector.
20		No	Install spark plugs on original cylinders. Go to next step.
21	• Remove and shake PCV valve. • Does PCV valve rattle?	Yes	Go to next step.
21	• Remove and shake PCV valve. • Does PCV valve rattle?	No	Replace PCV valve.
22	• Inspect for restriction in the exhaust system. • Is there any restriction?	Yes	Inspect exhaust system.
22		No	Go to next step.
23	• Install fuel pressure gauge between fuel filter and fuel distributor. • Connect jumper wire between F/P terminal at DLC in engine compartment and GND. • Turn ignition switch to ON (Engine OFF). • Is fuel line pressure correct with ignition switch at ON? (See FUEL LINE PRESSURE INSPECTION [AJ])	Yes	Go to next step.
23		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 fuel injector O-ring and fuel line. • Service as necessary. • Does fuel line pressure hold after ignition switch is turned to OFF?	Yes	Go to next step.
24		No	Inspect pressure regulator diaphragm condition. • If condition is normal, inspect fuel injector. • If condition is not normal, replace pressure regulator.
25	Note • Following test is for stall concerns with A/C on. If other symptoms exist, go to next step. • Connect pressure gauges to A/C low and high pressure side lines. • Turn A/C on and measure low side and high side pressure. • Are pressures within specifications?	Yes	Go to next step.
25		No	If A/C is always on, go to symptom troubleshooting "No.24 A/C always on/A/C compressor runs continuously". For other symptoms, inspect following: • Refrigerant charging amount • Condenser fan operation
26	• Disconnect vacuum hose between purge solenoid valve and intake manifold from purge solenoid side. • Plug opening end of vacuum hose. • Start engine. • Is engine stall now eliminated?	Yes	Inspect if purge solenoid valve is stuck open. Inspect EVAP control system.
26		No	Go to next step.
27	• Is air leakage felt or heard at intake-air system components while racing engine to higher speed?	Yes	Repair or replace.
27		No	Go to next step.
28	• Inspect engine condition while tapping EGR valve housing. • Does engine condition improve?	Yes	Replace EGR valve.
28		No	Go to next step.
29	• Is engine compression correct?	Yes	Inspect valve timing.
29	• Is engine compression correct?	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 PCM.