NO.27 SPARK PLUG CONDITION [MZR 2.0 DISI i-stop]

id0103d3804400

27

SPARK PLUG CONDITION
DESCRIPTION
•  Incorrect spark plug condition.
POSSIBLE CAUSE
Note
•  Inspecting the condition of the spark plugs can determine whether a problem is related to a specific cylinder or possibly all cylinders.
Wet/carbon stuck on specific plug:
•  Spark—Weak, not visible
•  Air/fuel mixture—Excessive fuel injection volume
•  Compression—No compression, low compression
•  Malfunctioning spark plug
Grayish white with specific plug:
•  Air/fuel mixture—Insufficient fuel injection volume
•  Malfunctioning spark plug
Wet/carbon is stuck on all plugs:
•  Spark—Spark weak
•  Air/fuel mixture—Too rich, excessive fuel line pressure
•  Compression—Low compression
•  Clogging in intake/exhaust system
Grayish white with all plugs:
•  Air/fuel mixture—Too lean, insufficient fuel line pressure
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
Remove all the spark plugs.
(See SPARK PLUG REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
Inspect the spark plug condition.
(See SPARK PLUG INSPECTION [MZR 2.0 DISI i-stop].)
Is there any malfunction?
Yes
Specific plug is wet or covered with carbon:
•  Go to the next step.
Specific plug looks grayish white:
•  Go to Step 9.
All plugs are wet or covered with carbon:
•  Go to Step 11.
All plugs look grayish white:
•  Go to Step 19.
No
Symptom troubleshooting is completed.
2
Is the spark plug wet/covered with carbon from the engine oil?
Yes
Inspect all areas related to the engine oil.
Repair or replace the malfunctioning part according to the inspection results.
No
Go to the next step.
3
Inspect the spark plugs for the following:
•  Cracked insulator
•  Heat range
•  Air gap
•  Worn electrode
Is there any malfunction?
Yes
Replace the suspected spark plug.
(See SPARK PLUG REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
No
Go to the next step.
4
Inspect the engine compression at the suspected cylinder.
(See COMPRESSION INSPECTION [MZR 2.0 DISI i-stop].)
Is there any malfunction?
Yes
Repair or replace the malfunctioning part according to the inspection results.
No
Go to the next step.
5
Install all the spark plugs.
(See SPARK PLUG REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
Perform the Spark Test at the suspected cylinder.
(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR 2.0 DISI i-stop].)
Is a strong blue spark visible? (Compare with normal cylinder.)
Yes
Go to the next step.
No
Repair or replace the malfunctioning part according to the inspection results.
6
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
Inspect the suspected fuel injector for open or short circuit.
(See FUEL INJECTOR INSPECTION [MZR 2.0 DISI i-stop].)
Repair or replace the malfunctioning part according to the inspection results.
(See FUEL INJECTOR REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
No
Go to the next step.
7
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.
8
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
High pressure fuel pump or spill valve control solenoid valve (built-in high pressure pump) malfunction.
•  Replace the high pressure fuel pump.
9
Inspect the spark plugs for the following:
•  Heat range
•  Air gap
Is there any malfunction?
Yes
Replace the suspected spark plug.
(See SPARK PLUG REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
No
Go to the next step.
10
Perform the KOER self test.
(See KOEO/KOER SELF TEST [MZR 2.0 DISI i-stop].)
Is the DTC P0201:00, P0202:00, P0203:00 or P0204:00 present?
Yes
Go to the applicable DTC inspection.
(See DTC P0201:00 [MZR 2.0 DISI i-stop].)
(See DTC P0202:00 [MZR 2.0 DISI i-stop].)
(See DTC P0203:00 [MZR 2.0 DISI i-stop].)
(See DTC P0204:00 [MZR 2.0 DISI i-stop].)
No
Inspect the suspect fuel injector for resistance.
(See FUEL INJECTOR INSPECTION [MZR 2.0 DISI i-stop].)
Repair or replace the malfunctioning part according to the inspection results.
(See FUEL INJECTOR REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
11
Is the air cleaner element free of blockage?
Yes
Go to the next step.
No
Replace the air cleaner element.
12
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 part according to the inspection results.
13
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 16.
No
Go to the next step.
14
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.
15
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
High pressure fuel pump or spill valve control solenoid valve (built-in high pressure pump) malfunction.
•  Replace the high pressure fuel pump.
16
Access the following PIDs using the M-MDS:
(See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI i-stop].)
•  ECT
•  MAF
•  O2S11 (When engine can be started)
Are the PIDs normal?
(See PCM INSPECTION [MZR 2.0 DISI i-stop].)
Yes
Go to the next step.
No
Repair or replace the malfunctioning part according to the inspection results.
17
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.
18
Inspect the engine compression.
(See COMPRESSION INSPECTION [MZR 2.0 DISI i-stop].)
Is there any malfunction?
Yes
Repair or replace the malfunctioning parts according to the inspection results.
No
Inspect for clogging in the exhaust system.
Repair or replace the malfunctioning parts according to the inspection results.
19
Inspect the following when the engine cannot be started:
•  Intake-air system for air leakage
•  Intake manifold vacuum
Is the air sucked in from the intake-air system?
Yes
Repair or replace the malfunctioning parts according to the inspection results.
No
Go to the next step.
20
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
Access the following PIDs using the M-MDS:
(See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI i-stop].)
(See PCM INSPECTION [MZR 2.0 DISI i-stop].)
•  ECT
•  O2S11
•  O2S12
•  MAF
Inspect the PCM ground condition.
Repair or replace the malfunctioning parts according to the inspection results.
No
Go to the next step.
21
Is the vehicle accelerate performance normally?
Yes
Go to the next step.
No
Go to Step 24.
22
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 the next step.
23
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.
24
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 the next step.
No
Relief valve (built-in fuel delivery pipe) malfunction.
•  Replace the fuel delivery pipe.
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].)