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NO.6 CRANKS NORMALLY BUT WILL NOT START [L3]

BME010300103244

6 | CRANKS NORMALLY BUT WILL NOT START
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DESCRIPTION | • Starter cranks engine at normal speed but engine will not run. • Refer to symptom troubleshooting "No.5 Engine stalls" if this symptom appears after engine stall. • Fuel is in tank. • Battery is in normal condition.
POSSIBLE CAUSE | • No battery power supply to PCM • Air leakage from intake-air system • Open PCM GND or vehicle body GND • Improper operation of IAC valve • EGR valve malfunction
• No signal from CKP sensor due to sensor, related wire or incorrect installation
• No signal from CMP sensor due to sensor, related wire or incorrect installation
• Low engine compression
• Engine overheating
• Vacuum leakage
• Spark leakage from high-tension leads
• Improper air/fuel mixture ratio control
• Poor fuel quality
• PCV valve malfunction
• Air cleaner restriction
• Restriction in exhaust system
• Disconnected electrical connector
• Open or short circuit in fuel pump body and related harness
• Inadequate fuel pressure
• Fuel pump mechanical malfunction
• Fuel leakage from injector
• Fuel injector is clogged.
• Purge solenoid valve malfunction
• Spark plug malfunction
• Ignition coil malfunction
• Improper valve timing
• Immobilizer system (PATS) and/or circuit malfunction (if equipped)
• Pressure regulator 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 [L3].)
  (See AFTER SERVICE PRECAUTION [L3].)

  Caution

  • Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.

Diagnostic procedure

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

  Note

  • The following test should be performed for vehicles with the immobilizer system. Go to Step 12 for the vehicles without the immobilizer system.
Connect the WDS or equivalent to the DLC-2.
Do the following conditions appear?

• Engine is not completely started.
• DTC P1624 is displayed.
Yes

Both conditions appear:

Go to Step 4.
No | Either or other condition appears: 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 security light illuminate? | Yes | Go to Step 8.
No | Go to the next step.
6 | Does the security light flash and indicate any of the following immobilizer system DTCs more than 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. Does the security 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 security 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. Are any of the following DTCs displayed? DTC P1602, P1603, P1604, P1621, P1622, P1624 | Yes | Go to the applicable DTC inspection. (See DTC TABLE [L3].)
No | Go to the next step.
9 | Is there continuity between PCM GND terminals 4A, 4B, 4C and GND? | Yes | Go to the next step.
No | Repair or replace the wiring harness.
10 | Turn the ignition switch to the ON position. Access VPWR PID. Is VPWR PID normal? VPWR PID Battery voltage | Yes | Go to the next step.
No | Repair or replace the wiring harness.
11 | Disconnect the coil connector. Turn the ignition switch to the ON position. Is there battery voltage at immobilizer control module connector terminal J? | Yes | Inspect for open circuit between PCM connector terminal 2Q 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 • External fuel shut off or accessory (kill switch, alarm etc.) • Fuel quality: proper octane, contamination, winter/summer blend • No air leakage from intake-air system
• Proper sealing of intake manifold and components attached to intake manifold: EGR valve, IAC valve
• Ignition wiring
• Electrical connections
• Fuses
• Smooth operation of throttle valve
Are all items normal?
Yes
Go to the next step.
No | Service if necessary. Repeat Step 10.
13 | Connect the WDS or equivalent to the DLC-2. Retrieve any continuous memory and KOEO DTC. Are there any DTCs displayed? | Yes | DTC is displayed: Go to the applicable DTC inspection. (See DTC TABLE [L3].) Communication error message is displayed: Inspect for the following:
• Open circuit between main relay and PCM terminal 2Y
• Open main relay GND circuit
• Main relay is stuck open.
• Open or poor GND circuit (PCM terminal 4X, 2AB, or 2AC)
• Poor connection of vehicle body GND
No | No DTC is displayed: Go to the next step.
14 | Turn the ignition switch to the ON position. Disconnect the TP sensor connector. Measure the voltage at the 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 troubleshooting "No.27 Constant voltage".
15 | Does the engine start with throttle closed? | Yes | Go to Step 29.
No | Go to the next step.
16 | Will the engine start and run smoothly at part throttle? | Yes | Inspect the IAC valve and the wiring harness.
No | Go to the next step.
17 | Connect the WDS or equivalent to the DLC-2. Access RPM PID. Is RPM PID indicating engine speed when cranking engine? | 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 2G or 2D • Open or short circuit in CKP sensor harnesses If the CKP sensor and the wiring harness are normal, go to the next step.
18 | 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.
19 | Measure the gap between the CKP sensor and teeth of the crankshaft pulley. Specification 0.5-1.9 mm {0.020-0.075 in} Is the gap within the specification? | Yes | Go to the next step.
No | Adjust the CKP sensor.
20 | Inspect for cranks on high-tension leads. Is there any crank on high-tension leads? | Yes | Repair the high-tension leads.
No | Go to the next step.
21 | Is strong blue spark visible at each disconnected high-tension lead while cranking the engine? | Yes | Go to the next step.
No | Inspect for the following: • Open or short circuit in ignition coil • Open circuit in high-tension leads • Open circuit between ignition coil connector GND terminal and GND • Open circuit between ignition switch and ignition coil
• Open circuit between ignition coil and PCM terminal 1A or 1B
22 | Inspect the spark plug conditions. Is the 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 the clogged fuel injector.
No | Install the spark plugs on original cylinders. Go to the next step.
23 | Remove and shake the PCV valve. Does the PCV valve rattle? | Yes | Go to the next step.
No | Replace the PCV valve.
24 | Inspect for restriction in the exhaust system. | Yes | Inspect the exhaust system.
No | Go to the next step.
25 | Install a fuel pressure gauge between the fuel pipe and the fuel distributor. Connect a jumper wire between F/P terminal at the DLC-2 in the engine compartment and GND. Turn the ignition switch to the ON position. Is fuel line pressure correct when the ignition switch is turned on/off five times?
(See FUEL LINE PRESSURE INSPECTION [L3].)
Yes
Go to the next step.
No | Zero or low: Inspect for clogged fuel line. If normal, replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L3].) High:
Replace the fuel pump unit.
(See FUEL PUMP UNIT REMOVAL/INSTALLATION [L3].)
26 | Visually inspect for fuel leakage at the fuel injector O-ring and fuel line. Service if necessary. Is fuel line pressure held after the ignition switch is turned off? (See FUEL LINE PRESSURE INSPECTION [L3].) | Yes | Go to the next step.
No | Inspect the fuel injector. If the fuel injector is normal, replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [L3].)
27 | Disconnect vacuum hose between the purge solenoid valve and the intake manifold from the purge solenoid valve side. Plug opening end of vacuum hose. Attempt to start the engine. Is the starting condition improved? | Yes | Inspect if the purge solenoid valve sticks open mechanically. Inspect the evaporative emission control system.
No | Go to the next step.
28 | Is air leakage felt or heard at the intake-air system components while racing the engine to higher speed? | Yes | Repair or replace the malfunctioning part.
No | Go to the next step.
29 | Inspect the engine condition while tapping the EGR valve housing. Is the engine condition improved? | Yes | Replace the EGR valve. (See EGR VALVE REMOVAL/INSTALLATION [L3].)
No | Go to the next step.
30 | Is the engine compression correct? | Yes | Inspect the valve timing.
No | Inspect for causes.
31 | Verify test results. • If normal, return to diagnostic index to service any additional symptoms. • If malfunction remains, replace PCM.