NO.5 ENGINE STALLS-AFTER START/AT IDLE [MZR 2.0 DISI i-stop]

id0103d3801100

5

ENGINE STALLS-AFTER START/AT IDLE
DESCRIPTION
•  Engine stops unexpectedly at idle or after start or both.
POSSIBLE CAUSE
•  Poor fuel quality
•  Air leakage from intake-air system
•  Intake-air system restriction
•  Electrical connector disconnection
•  No battery power supply to PCM or poor ground
•  Fuel leakage
•  Vacuum leakage
•  PCM DTC is stored.
•  Engine overheating
•  Improper operation of A/C system
•  Improper operation of drive-by-wire control system
•  EGR valve malfunction
•  Purge solenoid valve malfunction
•  Improper operation of variable valve timing control system
•  Erratic signal from CMP sensor
•  No signal from CKP sensor due to sensor, related wiring harness or wrong installation
•  Erratic signal to PCM
―  APP sensor or related circuit malfunction
―  ECT sensor or related circuit malfunction
―  MAF sensor or related circuit malfunction
―  A/F sensor or related circuit malfunction
―  HO2S or related circuit malfunction
―  Improper air/fuel mixture ratio control
•  Exhaust system and/or TWC restriction or clogging
•  Ignition system malfunction
•  Ignition coil malfunction
•  Inadequate fuel pressure (high or low pressure side)
―  Open or short circuit in the fuel pump (low-side) body or related wiring harness
―  Fuel pump resister or related circuit malfunction
―  Fuel pressure sensor or related circuit malfunction
―  Fuel pump (low-side) body mechanical 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 malfunction (built-in high pressure fuel pump)
―  Relief valve malfunction (built-in fuel delivery pipe)
―  Fuel line restriction
―  Fuel filter clogging
•  Incorrect fuel injection timing
•  Fuel injector malfunction
•  Low engine compression
•  Improper valve timing
•  PCV valve malfunction
•  Injector driver (built-in PCM) 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 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 manual. (See BEFORE SERVICE PRECAUTION [MZR 2.0 DISI i-stop].) (See AFTER SERVICE PRECAUTION [MZR 2.0 DISI i-stop].)
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.

Diagnostic procedure

STEP

INSPECTION

RESULTS

ACTION
1
Turn off the i-stop system.
Verify the symptom.
Is the symptom confirmed?
Yes
Go to the next step.
No
The cause of symptom is in the i-stop system.
•  Perform the appropriate i-stop system symptom troubleshooting procedure.
2
Inspect for the following:
•  Fuel quality (proper octane, contamination, winter/summer blend)
•  Intake-air system leakage and restriction
•  Electrical connectors
•  Poor connection for PCM ground and body ground
•  Fuel leakage
•  Vacuum leakage
Is there any malfunction?
Yes
Service if necessary.
•  Repeat this step.
No
Go to the next step.
3
Connect the M-MDS to the DLC-2.
Switch the ignition to ON (engine off).
Retrieve any DTCs using the M-MDS.
(See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI i-stop].)
Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZR 2.0 DISI i-stop].)
No
Go to the next step.
4
Access the ECT PID using the M-MDS.
(See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI i-stop].)
Is the ECT PID value less than 116 °C {241 °F} during driving?
Yes
Go to the next step.
No
The cause of this concern could be from the cooling system overheating.
•  Perform the symptom troubleshooting “NO.17 COOLING SYSTEM CONCERNS-OVERHEATING”.
5
Access the VPWR PID using the M-MDS.
(See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI i-stop].)
Is the VPWR PID value B+?
Yes
Go to the next step.
No
Repair or replace the wiring harness between main relay terminal C and PCM terminal 1BE and 1BF.
6
Perform the A/C Cut-off Control System Inspection.
(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR 2.0 DISI i-stop].)
Does the A/C cut-off operation work properly?
Yes
Go to the next step.
No
Repair or replace the malfunctioning part according to the inspection results.
7
Will the engine run smoothly at part throttle?
Yes
Go to the next step.
No
Go to Step 9.
8
Perform the TP sweep inspection.
(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR 2.0 DISI i-stop].)
Does the drive-by-wire control system work properly?
Yes
Visually inspect the throttle body (damage/scratching).
•  If normal:
―  Go to the next step.
•  If not:
―  Repair or replace the malfunctioning parts according to the inspection results.
No
Inspect or replace the malfunctioning parts, according to the inspection results.
9
Inspect the engine condition while tapping the EGR valve housing.
Does the engine condition improve?
Yes
Replace the EGR valve.
(See EGR VALVE REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
No
Go to the next step.
10
Perform the Purge Control System Inspection.
(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR 2.0 DISI i-stop].)
Does the purge solenoid valve work properly?
Yes
Go to the next step.
No
Repair or replace the malfunctioning parts according to the inspection results.
11
Perform the Variable Valve Timing Control System Operation Inspection.
(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR 2.0 DISI i-stop].)
Does the variable valve timing control system work properly?
Yes
Go to the next step.
No
Repair or replace the malfunctioning parts according to the inspection results.
12
Inspect the CMP sensor and CKP sensor for the following:
•  Installation condition
•  Damaged trigger wheel and camshaft
•  Open or short circuit in related circuit
Is there any malfunction?
Yes
Repair or replace the malfunctioning parts according to the inspection results.
No
Go to the next step.
13
Caution
•  While performing this step, always operate the vehicle in a safe and lawful manner.
•  When the M-MDS is used to observe monitor system status while driving, be sure to have another technician with you, or record the data in the M-MDS using the PID/DATA MONITOR AND RECORD capturing function and inspect later.
Access the following PIDs using the M-MDS:
(See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI i-stop].)
•  APP
•  ECT
•  LONGFT1
•  MAF
•  O2S11
•  O2S12
•  SHTFT1
Do the PIDs indicate the correct values under the trouble condition?
(See PCM INSPECTION [MZR 2.0 DISI i-stop].)
Yes
Go to the next step.
No
Repair or replace the malfunctioning parts according to the inspection results.
•  If the malfunction remains:
―  Perform the “INTERMITTENT CONCERN TROUBLESHOOTING”.
14
Inspect for restriction in the exhaust system and the TWC.
Is there any restriction?
Yes
Repair or replace the malfunctioning parts according to the inspection results.
No
Go to the next step.
15
Perform the Spark Test.
(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR 2.0 DISI i-stop].)
Is a strong blue spark visible at each cylinder?
Yes
Go to the next step.
No
Repair or replace the malfunctioning parts according to the inspection results.
16
Access the FUEL_PRES PID using the M-MDS.
(See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI i-stop].)
Is the FUEL_PRES PID value within the specification?
(See PCM INSPECTION [MZR 2.0 DISI i-stop].)
Yes
Go to Step 21.
No
Go to the next step.
17
Is the vehicle accelerate performance normally?
Yes
Go to the next step.
No
Go to Step 19.
18
Inspect the fuel pressure sensor.
(See FUEL PRESSURE SENSOR INSPECTION [MZR 2.0 DISI i-stop].)
Is there any malfunction?
Yes
Replace the fuel delivery pipe.
(See FUEL INJECTOR REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
No
Go to Step 21.
19
Switch the ignition to off.
Disconnect the high pressure fuel pump and PCM connectors.
Inspect for continuity between high pressure fuel pump terminal A (wiring harness-side) and body ground.
Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to ground.
•  If the malfunction remains:
―  Replace the PCM. (Damage to driver in PCM)
No
Go to the next step.
20
Replace the high pressure fuel pump.
(See HIGH PRESSURE FUEL PUMP REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
Access the FUEL_PRES PID using the M-MDS.
(See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI i-stop].)
Is the FUEL_PRES PID value within the specification?
(See PCM INSPECTION [MZR 2.0 DISI i-stop].)
Yes
High pressure fuel pump or spill valve control solenoid valve (built-in high pressure pump) malfunction.
•  Symptom troubleshooting is completed.
•  Go to Step 25.
No
Relief valve (built-in fuel delivery pipe) malfunction.
•  Replace the fuel delivery pipe.
21
Connect the fuel pressure gauge between the fuel pump and the high pressure fuel pump.
Measure the fuel pressure line of the low pressure side.
(See FUEL LINE PRESSURE INSPECTION [MZR 2.0 DISI i-stop].)
Is the fuel pressure within the specification?
Yes
Go to the next step.
No
Inspect for the following:
•  Fuel line restriction
•  Fuel filter clogging
―  If there is a malfunction:
•  Repair or replace the malfunctioning parts according to the inspection results.
―  If normal:
•  Replace the fuel pump unit.
22
Perform the Fuel Injector Operation Inspection.
(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR 2.0 DISI i-stop].)
Do the fuel injectors operate properly?
Yes
Go to the next step.
No
Repair or replace the malfunctioning parts according to the inspection results.
23
Measure the compression pressure for each cylinder.
(See COMPRESSION INSPECTION [MZR 2.0 DISI i-stop].)
Are compression pressures within the specified?
Yes
Go to the next step.
No
Inspect for the following:
•  Damaged valve seat
•  Worn valve stem and valve guide
•  Worn or stuck piston ring
•  Worn piston, piston ring or cylinder
•  Improper valve timing
Repair or replace the malfunctioning parts according to the inspection results.
24
Inspect the PCV valve.
(See POSITIVE CRANKCASE VENTILATION (PCV) VALVE INSPECTION [MZR 2.0 DISI i-stop].)
Is there any malfunction?
Yes
Replace the PCV valve.
(See POSITIVE CRANKCASE VENTILATION (PCV) VALVE REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
No
Injector driver is malfunction.
•  Replace the PCM.
If the problem remains, overhaul the engine.
25
Verify the test results.
•  If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [MZR 2.0 DISI i-stop].)
•  If a malfunction remains, inspect the related Service Information and perform the repair or diagnosis.
―  If the vehicle is repaired, troubleshooting is completed.
―  If the vehicle is not repaired or additional diagnostic information is not available, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)