NO.12 LACK/LOSS OF POWER-ACCELERATION/CRUISE [MZR 2.0 DISI i-stop]

id0103d3801800

12

LACK/LOSS OF POWER-ACCELERATION/CRUISE
DESCRIPTION
•  Performance is poor under load. (e.g., power down when climbing hills)
POSSIBLE CAUSE
•  Drive-by-wire control system operates with brake override system
•  Poor fuel quality
•  Air leakage or restriction from intake-air system
•  Air cleaner restriction or dirty
•  Vacuum leakage
•  Clutch slippage
•  Brake dragging
•  PCM DTC is stored.
•  Engine overheating
•  EGR system malfunction
•  Improper operation of A/C system
•  Improper operation of drive-by-wire control system
•  Throttle body malfunction
•  Variable swirl system malfunction
•  Improper operation of variable valve timing control system
•  Purge solenoid valve malfunction
•  Erratic signal to PCM
―  APP sensor or related circuit malfunction
―  ECT sensor or related circuit malfunction
―  IAT sensor or related circuit malfunction
―  MAF sensor or related circuit malfunction
―  MAP sensor or related circuit malfunction
―  Intermittent open or short circuit MAF sensor, APP sensor, TP sensor and VSS
•  Erratic or no signal from CMP sensor
―  Loose installation
―  Damaged trigger wheel (camshaft)
―  Open or short circuit in related wiring harness
•  Erratic signal from CKP sensor
―  Loose installation
―  Damaged trigger wheel (crankshaft pulley)
―  Open or short circuit in related wiring harness
•  Spark plug malfunction
•  Incorrect signal to ignition coil
•  Exhaust system and/or TWC restriction
•  Improper air/fuel mixture ratio control operation
•  Inadequate fuel pressure (high or low pressure side)
―  Fuel leakage
―  Fuel pressure sensor or related circuit malfunction
―  Fuel pressure sensor 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 (built-in high pressure fuel pump) malfunction
―  Relief valve (built-in fuel delivery pipe) malfunction
―  Fuel line restriction or clogging
―  Fuel pump mechanical malfunction
•  Incorrect fuel injection timing
•  Fuel injector malfunction
•  Improper valve timing due to jumping out timing chain
•  Low engine compression
•  PCV valve malfunction
•  Injector driver (built-in PCM) malfunction
POSSIBLE CAUSE
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
Retrieve the PCM DTC using the M-MDS.
(See ON-BOARD DIAGNOSTIC TEST [MZR 2.0 DISI i-stop].)
Is the DTC P2299:00 present?
Yes
Go to the applicable DTC inspection. (Drive-by-wire control system operates with brake override system.)
(See DTC P2299:00 [MZR 2.0 DISI i-stop].)
No
Go to the next step.
2
Inspect for the following:
•  Fuel quality (proper octane, contamination, winter/summer blend)
•  Intake-air system restriction or leakage
•  Air cleaner restriction or dirty
•  Vacuum leakage
•  Clutch slippage
•  Brake dragging
Is there any malfunction?
Yes
Service if necessary.
•  Repeat this step.
No
Go to the next step.
3
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
Is the engine overheating?
Yes
Perform the symptom troubleshooting “NO.17 COOLING SYSTEM CONCERNS-OVERHEATING”.
(See NO.17 COOLING SYSTEM CONCERNS-OVERHEATING [MZR 2.0 DISI i-stop].)
No
Go to the next step.
5
Perform the EGR Control System Inspection.
(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR 2.0 DISI i-stop].)
Does the EGR system operate properly?
Yes
Go to the next step.
No
Repair or replace the malfunctioning parts according to the inspection results.
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
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.
8
Visually inspect the throttle valve.
(See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
Are any foreign material adhere to around throttle valve?
Yes
Clean the throttle valve.
No
Go to the next step.
9
Perform the Variable Swirl System Operation Inspection.
(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR 2.0 DISI i-stop].)
Does the variable swirl system work properly?
Yes
Go to the next step.
No
Repair or replace the malfunctioning part according to the inspection results.
10
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.
11
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.
12
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
•  IAT
•  MAF
•  MAP
•  TP
•  FP
•  VSS
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”.
13
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.
14
Inspect the spark plug condition.
(See SPARK PLUG INSPECTION [MZR 2.0 DISI i-stop].)
Is the spark plug wet, covered with carbon or grayish white?
Yes
Spark plug is wet or covered with carbon:
•  Perform the Spark Test.
•  Repair or replace the malfunctioning parts according to the inspection results.
Spark plug is grayish white:
•  Go to Step 24.
No
Install the spark plugs on original cylinders.
Go to the next step.
15
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.
16
Inspect for fuel leakage in the fuel line.
Is there any leakage?
Yes
Repair or replace the malfunctioning parts according to the inspection results.
No
Go to the next step.
17
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 20.
No
Go to the next step.
18
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.
19
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 24.
No
Relief valve (built-in fuel delivery pipe) malfunction.
•  Replace the fuel delivery pipe.
20
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.
21
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.
22
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.
23
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.
•  Inspect the transaxle internal component. (ATX)
―  Repair or replace the malfunctioning parts according to the inspection results.
24
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].)