NO.14 LACK/LOSS OF POWER-ACCELERATION/CRUISE [MZR-CD 2.2]

14	LACK/LOSS OF POWER—ACCELERATION/CRUISE
DESCRIPTION	• Performance is poor under load (e.g., power down when climbing hills).
POSSIBLE CAUSE	• Fuel injection amount control system operates with brake override system (From GH1*-442043, GH10-210449) • Poor fuel quality • Low fuel level (PCM stores DTC P115A:00) • Air leakage from intake-air system • Intake-air system restriction or clogging • Engine overheating • Improper operation of A/C system • Improper operation of A/C cut-off control • VBC system malfunction ― Guide blade actuator malfunction ― Guide blade actuator position sensor malfunction • EGR system malfunction • Vacuum leakage • Clutch slippage • Exhaust system and/or oxidation catalytic converter restriction • Fuel line or clogging or restriction • Fuel filter clogging or restriction • Incorrect fuel injection timing • Erratic signal from CKP sensor • Erratic signal from CMP sensor • ECT sensor or related circuit malfunction • Boost sensor or related circuit malfunction • APP sensor or related circuit malfunction • MAF/IAT sensor or related circuit malfunction • IAT sensor No.2 or related circuit malfunction • A/F sensor or related circuit malfunction • Incorrect idle speed • Inadequate fuel pressure ― Fuel pressure sensor or related circuit malfunction ― Fuel pressure limiter malfunction (built-in common rail) ― Suction control valve control circuit malfunction (damaged to driver in PCM caused by short circuit to ground system) ― Suction control valve malfunction (built-in supply pump) ― Supply pump malfunction • Fuel injector malfunction • Low engine compression • Improper valve timing • Cooling fan seat is improper • Turbocharger malfunction • Charge air cooler malfunction • Brake system dragging • Intake shutter valve malfunction • Fuel injection learning improper 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-CD 2.2].) (See AFTER SERVICE PRECAUTION [MZR-CD 2.2].)

LACK/LOSS OF POWER—ACCELERATION/CRUISE

DESCRIPTION

• Performance is poor under load (e.g., power down when climbing hills).

POSSIBLE CAUSE

• Fuel injection amount control system operates with brake override system (From GH1***-442043, GH10**-210449)

• Poor fuel quality

• Low fuel level (PCM stores DTC P115A:00)

• Air leakage from intake-air system

• Intake-air system restriction or clogging

• Engine overheating

• Improper operation of A/C system

• Improper operation of A/C cut-off control

• VBC system malfunction

― Guide blade actuator malfunction

― Guide blade actuator position sensor malfunction

• EGR system malfunction

• Vacuum leakage

• Clutch slippage

• Exhaust system and/or oxidation catalytic converter restriction

• Fuel line or clogging or restriction

• Fuel filter clogging or restriction

• Incorrect fuel injection timing

• Erratic signal from CKP sensor

• Erratic signal from CMP sensor

• ECT sensor or related circuit malfunction

• Boost sensor or related circuit malfunction

• APP sensor or related circuit malfunction

• MAF/IAT sensor or related circuit malfunction

• IAT sensor No.2 or related circuit malfunction

• A/F sensor or related circuit malfunction

• Incorrect idle speed

• Inadequate fuel pressure

― Fuel pressure sensor or related circuit malfunction

― Fuel pressure limiter malfunction (built-in common rail)

― Suction control valve control circuit malfunction (damaged to driver in PCM caused by short circuit to ground system)

― Suction control valve malfunction (built-in supply pump)

― Supply pump malfunction

• Fuel injector malfunction

• Low engine compression

• Improper valve timing

• Cooling fan seat is improper

• Turbocharger malfunction

• Charge air cooler malfunction

• Brake system dragging

• Intake shutter valve malfunction

• Fuel injection learning improper

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-CD 2.2].) (See AFTER SERVICE PRECAUTION [MZR-CD 2.2].)

STEP	INSPECTION	RESULTS	ACTION
1^*1	Perform the PCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].) Is the DTC P2299:00 present?	Yes	Go to the applicable DTC inspection. (fuel injection amount control system operates with brake override system.) (See DTC P2299:00 [MZR-CD 2.2].)
No	Go to the next step.
2	Retrieve the PCM DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].) Is the PCM DTC P115A:00 displayed?	Yes	Go to the applicable DTC inspection. (See DTC P115A:00 [MZR-CD 2.2].)
No	Go to the next step.
3	Is the idle speed stable?	Yes	Go to the next step.
No	Go to the symptom troubleshooting “NO.10 ENGINE RUNS ROUGH/ROLLING IDLE”. (See NO.10 ENGINE RUNS ROUGH/ROLLING IDLE [MZR-CD 2.2].)
4	Is the engine overheating?	Yes	Go to the symptom troubleshooting “NO.19 COOLING SYSTEM CONCERNS-OVERHEATING”. (See NO.19 COOLING SYSTEM CONCERNS-OVERHEATING [MZR-CD 2.2].)
No	Go to the next step.
5	Perform the KOEO or KOER self test. (See KOEO/KOER SELF TEST [MZR-CD 2.2].) Are any DTCs displayed?	Yes	DTC is displayed: • Go to the applicable DTC inspection. (See DTC TABLE [MZR-CD 2.2].) Communication error message is displayed: • Open circuit in wiring harness between main relay terminal E and PCM terminal 2I • Open circuit in wiring harness between main relay terminal C and PCM terminals 2C, 2F • Main relay is stuck open. • Open or poor ground circuit (PCM terminals 2A, 2B, 2D and 2E) • Poor connection of vehicle body ground
No	Go to the next step.
6	Start and warm up the engine to normal operating temperature. Verify the diesel particulate filter indicator light condition. Does the diesel particulate filter indicator light illuminate or flash?	Yes	Diesel particulate filter indicator light illuminates: • Perform the manual diesel particulate filter regeneration procedure. (See DIESEL PARTICULATE FILTER REGENERATION [MZR-CD 2.2].) Diesel particulate filter indicator light flashes: • Go to the symptom troubleshooting “NO.4 DIESEL PARTICULATE FILTER INDICATOR LIGHT FLASHES”. (See NO.4 DIESEL PARTICULATE FILTER INDICATOR LIGHT FLASHES [MZR-CD 2.2].)
No	Go to the next step.
7	Inspect the following: • Fuel quality (e.g.: including water contamination, winter/summer blend) • Fuel line/fuel filter clogging and/or restriction • Intake-air system restriction • Exhaust system and/or oxidation catalytic converter restriction • Charge air cooler condition (restriction or damaged) • Vacuum leakage • Cooling fan seat Are all items normal?	Yes	Go to the next step.
No	Service if necessary. Repeat Step 7.
8	Perform the A/C Cut-off Control System Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR-CD 2.2].) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
No	Go to the next step.
9	Perform the Intake Shutter Valve Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR-CD 2.2].) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
No	Go to the next step.
10	Access the following PIDs using the M-MDS: (See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].) • VBC_POS • VBCV Command VBCV PID from 0 to 100 % using the simulation function. Does the VBC_POS PID value change according to the VBCV commanded value?	Yes	Go to Step 12.
No	Go to the next step.
11	Perform the Guide Blade Actuator Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR-CD 2.2].) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
No	Go to the next step.
12	Inspect the hose bands between the following parts: • Turbocharger compressor housing and air cleaner • Turbocharger compressor housing and charge air cooler Are the hose bands loose?	Yes	Retighten the hose bands. • If the concern is resolved: ― Symptom troubleshooting is completed. • If the concern still exists: ― Go to the next step.
No	Go to the next step.
13	Inspect for improper operation, kinks, clogging or disconnection on the guide blade actuator. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR-CD 2.2].) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results. • If the concern is resolved: ― Symptom troubleshooting is completed. • If the concern still exists: ― Turbocharger is normal. • Go to the next step.
No	Go to the next step.
14	Remove parts necessary to inspect the turbocharger. Do not remove the turbocharger. Inspect if the turbocharger compressor wheel is bent, damaged, or interfering with the housing on the vehicle. (See TURBOCHARGER INSPECTION [MZR-CD 2.2].) Is there any malfunction?	Yes	Replace the turbocharger. (See EXHAUST SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2].)
No	Go to the next step.
15	Inspect if the turbocharger compressor wheel locknut is loose or has fallen down inside the turbocharger. Is there any malfunction?	Yes	Replace the turbocharger. (See EXHAUST SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2].)
No	Go to the next step.
16	Inspect the turbocharger compressor wheel by hand. Does the wheel turn easily and smoothly?	Yes	Go to the next step.
No	Replace the turbocharger. (See EXHAUST SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2].)
17	Inspect if the turbocharger turbine wheel is damaged, cracked or interfering with the housing on the vehicle. Note • Inspect all fins on each turbine wheel. Is there any malfunction?	Yes	Replace the turbocharger. (See EXHAUST SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2].)
No	Go to the next step.
18	Is any engine oil found inside the turbocharger turbine housing?	Yes	If the excessive amount of oil is found: • Replace the turbocharger. (See EXHAUST SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2].) If the small amount of oil is found: • Wipe oil off of the vehicle, then go to the next step.
No	Go to the next step.
19	Is any engine oil found inside the turbocharger compressor housing?	Yes	Wipe oil off of the vehicle. Reinstall all removed parts in Step 14, then go to the next step.
No	Turbocharger is normal. • Reinstall all removed parts in Step 14, then go to the next step.
20	Perform the EGR Valve Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR-CD 2.2].) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
No	Go to the next step.
21	Inspect the idle speed. (See ENGINE TUNE-UP [MZR-CD 2.2].) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
No	Go to the next step.
22	Inspect the APP sensor. (See ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION [MZR-CD 2.2].) Is there any malfunction?	Yes	Replace the accelerator pedal component. (See ACCELERATOR PEDAL COMPONENT REMOVAL/INSTALLATION [MZR-CD 2.2].)
No	Go to the next step.
23	Visually inspect the CKP sensor and teeth of pulse wheel. (See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [MZR-CD 2.2].) Are the CKP sensor and teeth of pulse wheel normal?	Yes	Go to the next step.
No	Repair or replace the malfunctioning part according to the inspection results.
24	Visually inspect the CMP sensor and teeth of pulse wheel. (See CAMSHAFT POSITION (CMP) SENSOR INSPECTION [MZR-CD 2.2].) Are the CMP sensor and teeth of pulse wheel normal?	Yes	Access the following PIDs using the M-MDS: (See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].) (See PCM INSPECTION [MZR-CD 2.2].) • ECT • IAT • MAF • MAP • RPM • O2S11 ― If the PID value is not normal: • Repair or replace the malfunctioning part according to the inspection results. ― If the PID value is normal: • Go to the next step.
No	Repair or replace the malfunctioning part according to the inspection results.
25	Inspect the suction control valve. (See SUCTION CONTROL VALVE INSPECTION [MZR-CD 2.2].) Is there any malfunction?	Yes	Replace the supply pump. (See SUPPLY PUMP REMOVAL/INSTALLATION [MZR-CD 2.2].)
No	Go to the next step.
26	Switch the ignition to off. Disconnect the suction control valve and PCM connectors. Inspect for continuity between suction control valve 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. (damaged to driver in PCM caused by short circuit to ground system) (See PCM REMOVAL/INSTALLATION [MZR-CD 2.2].)
No	Go to the next step.
27	Inspect the fuel pressure sensor. (See FUEL PRESSURE SENSOR INSPECTION [MZR-CD 2.2].) Is there any malfunction?	Yes	Replace the common rail. (See COMMON RAIL REMOVAL/INSTALLATION [MZR-CD 2.2].)
No	Go to the next step.
28	Inspect the engine compression. (See COMPRESSION INSPECTION [MZR-CD 2.2].) Is there any malfunction?	Yes	Inspect 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 Service if necessary.
No	Go to the next step.
29	Inspect the fuel injector. (See FUEL INJECTOR INSPECTION [MZR-CD 2.2].) Is there any malfunction?	Yes	Replace the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [MZR-CD 2.2].)
No	Go to the next step.
30	Inspect the timing chain for the following: • Chipping of gear teeth • Low tension • Breakage damage or cracks Is there any malfunction?	Yes	If the valve timing is incorrect: • Adjust the valve timing. If the timing chain is not normal: • Replace the timing chain. (See TIMING CHAIN REMOVAL/INSTALLATION [MZR-CD 2.2].)
No	Inspect the following: • Clutch slippage • CKP sensor • Boost sensor and related circuit • Brake system for dragging ― If there is any malfunction: • Repair or replace the malfunctioning part according to the inspection results. ― If there is no malfunction: • Remove the supply pump and common rail. (See SUPPLY PUMP REMOVAL/INSTALLATION [MZR-CD 2.2].) (See COMMON RAIL REMOVAL/INSTALLATION [MZR-CD 2.2].) • Inspect the supply pump and common rail. (See SUPPLY PUMP INSPECTION [MZR-CD 2.2].) (See COMMON RAIL INSPECTION [MZR-CD 2.2].) • Repair or replace the malfunctioning part according to the inspection results.
31	Verify test results. • If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [MZR-CD 2.2].) • If the 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, reprogram the PCM if a later calibration is available. Retest.

STEP

INSPECTION

RESULTS

ACTION

1^*1

Perform the PCM DTC inspection using the M-MDS.

(See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].)

Is the DTC P2299:00 present?

Yes

Go to the applicable DTC inspection. (fuel injection amount control system operates with brake override system.)

(See DTC P2299:00 [MZR-CD 2.2].)

Go to the next step.

Retrieve the PCM DTCs using the M-MDS.

(See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].)

Is the PCM DTC P115A:00 displayed?

Yes

Go to the applicable DTC inspection.

(See DTC P115A:00 [MZR-CD 2.2].)

Go to the next step.

Is the idle speed stable?

Yes

Go to the next step.

Go to the symptom troubleshooting “NO.10 ENGINE RUNS ROUGH/ROLLING IDLE”.

(See NO.10 ENGINE RUNS ROUGH/ROLLING IDLE [MZR-CD 2.2].)

Is the engine overheating?

Yes

Go to the symptom troubleshooting “NO.19 COOLING SYSTEM CONCERNS-OVERHEATING”.

(See NO.19 COOLING SYSTEM CONCERNS-OVERHEATING [MZR-CD 2.2].)

Go to the next step.

Perform the KOEO or KOER self test.

(See KOEO/KOER SELF TEST [MZR-CD 2.2].)

Are any DTCs displayed?

Yes

DTC is displayed:

• Go to the applicable DTC inspection.

(See DTC TABLE [MZR-CD 2.2].)

Communication error message is displayed:

• Open circuit in wiring harness between main relay terminal E and PCM terminal 2I

• Open circuit in wiring harness between main relay terminal C and PCM terminals 2C, 2F

• Main relay is stuck open.

• Open or poor ground circuit (PCM terminals 2A, 2B, 2D and 2E)

• Poor connection of vehicle body ground

Go to the next step.

Start and warm up the engine to normal operating temperature.

Verify the diesel particulate filter indicator light condition.

Does the diesel particulate filter indicator light illuminate or flash?

Yes

Diesel particulate filter indicator light illuminates:

• Perform the manual diesel particulate filter regeneration procedure.

(See DIESEL PARTICULATE FILTER REGENERATION [MZR-CD 2.2].)

Diesel particulate filter indicator light flashes:

• Go to the symptom troubleshooting “NO.4 DIESEL PARTICULATE FILTER INDICATOR LIGHT FLASHES”.

(See NO.4 DIESEL PARTICULATE FILTER INDICATOR LIGHT FLASHES [MZR-CD 2.2].)

Go to the next step.

Inspect the following:

• Fuel quality (e.g.: including water contamination, winter/summer blend)

• Fuel line/fuel filter clogging and/or restriction

• Intake-air system restriction

• Exhaust system and/or oxidation catalytic converter restriction

• Charge air cooler condition (restriction or damaged)

• Vacuum leakage

• Cooling fan seat

Are all items normal?

Yes

Go to the next step.

Service if necessary.

Repeat Step 7.

Perform the A/C Cut-off Control System Inspection.

(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR-CD 2.2].)

Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results.

Go to the next step.

Perform the Intake Shutter Valve Operation Inspection.

(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR-CD 2.2].)

Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results.

Go to the next step.

Access the following PIDs using the M-MDS:

(See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].)

• VBC_POS

• VBCV

Command VBCV PID from 0 to 100 % using the simulation function.

Does the VBC_POS PID value change according to the VBCV commanded value?

Yes

Go to Step 12.

Go to the next step.

Perform the Guide Blade Actuator Operation Inspection.

(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR-CD 2.2].)

Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results.

Go to the next step.

Inspect the hose bands between the following parts:

• Turbocharger compressor housing and air cleaner

• Turbocharger compressor housing and charge air cooler

Are the hose bands loose?

Yes

Retighten the hose bands.

• If the concern is resolved:

― Symptom troubleshooting is completed.

• If the concern still exists:

― Go to the next step.

Go to the next step.

Inspect for improper operation, kinks, clogging or disconnection on the guide blade actuator.

(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR-CD 2.2].)

Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results.

• If the concern is resolved:

― Symptom troubleshooting is completed.

• If the concern still exists:

― Turbocharger is normal.

• Go to the next step.

Go to the next step.

Remove parts necessary to inspect the turbocharger.

Do not remove the turbocharger.

Inspect if the turbocharger compressor wheel is bent, damaged, or interfering with the housing on the vehicle.

(See TURBOCHARGER INSPECTION [MZR-CD 2.2].)

Is there any malfunction?

Yes

Replace the turbocharger.

(See EXHAUST SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2].)

Go to the next step.

Inspect if the turbocharger compressor wheel locknut is loose or has fallen down inside the turbocharger.

Is there any malfunction?

Yes

Replace the turbocharger.

(See EXHAUST SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2].)

Go to the next step.

Inspect the turbocharger compressor wheel by hand.

Does the wheel turn easily and smoothly?

Yes

Go to the next step.

Replace the turbocharger.

(See EXHAUST SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2].)

Inspect if the turbocharger turbine wheel is damaged, cracked or interfering with the housing on the vehicle.

Note

• Inspect all fins on each turbine wheel.

Is there any malfunction?

Yes

Replace the turbocharger.

(See EXHAUST SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2].)

Go to the next step.

Is any engine oil found inside the turbocharger turbine housing?

Yes

If the excessive amount of oil is found:

• Replace the turbocharger.

(See EXHAUST SYSTEM REMOVAL/INSTALLATION [MZR-CD 2.2].)

If the small amount of oil is found:

• Wipe oil off of the vehicle, then go to the next step.

Go to the next step.

Is any engine oil found inside the turbocharger compressor housing?

Yes

Wipe oil off of the vehicle.

Reinstall all removed parts in Step 14, then go to the next step.

Turbocharger is normal.

• Reinstall all removed parts in Step 14, then go to the next step.

Perform the EGR Valve Operation Inspection.

(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR-CD 2.2].)

Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results.

Go to the next step.

Inspect the idle speed.

(See ENGINE TUNE-UP [MZR-CD 2.2].)

Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results.

Go to the next step.

Inspect the APP sensor.

(See ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION [MZR-CD 2.2].)

Is there any malfunction?

Yes

Replace the accelerator pedal component.

(See ACCELERATOR PEDAL COMPONENT REMOVAL/INSTALLATION [MZR-CD 2.2].)

Go to the next step.

Visually inspect the CKP sensor and teeth of pulse wheel.

(See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [MZR-CD 2.2].)

Are the CKP sensor and teeth of pulse wheel normal?

Yes

Go to the next step.

Repair or replace the malfunctioning part according to the inspection results.

Visually inspect the CMP sensor and teeth of pulse wheel.

(See CAMSHAFT POSITION (CMP) SENSOR INSPECTION [MZR-CD 2.2].)

Are the CMP sensor and teeth of pulse wheel normal?

Yes

Access the following PIDs using the M-MDS:

(See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].)

(See PCM INSPECTION [MZR-CD 2.2].)

• ECT

• IAT

• MAF

• MAP

• RPM

• O2S11

― If the PID value is not normal:

• Repair or replace the malfunctioning part according to the inspection results.

― If the PID value is normal:

• Go to the next step.

Repair or replace the malfunctioning part according to the inspection results.

Inspect the suction control valve.

(See SUCTION CONTROL VALVE INSPECTION [MZR-CD 2.2].)

Is there any malfunction?

Yes

Replace the supply pump.

(See SUPPLY PUMP REMOVAL/INSTALLATION [MZR-CD 2.2].)

Go to the next step.

Switch the ignition to off.

Disconnect the suction control valve and PCM connectors.

Inspect for continuity between suction control valve 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. (damaged to driver in PCM caused by short circuit to ground system)

(See PCM REMOVAL/INSTALLATION [MZR-CD 2.2].)

Go to the next step.

Inspect the fuel pressure sensor.

(See FUEL PRESSURE SENSOR INSPECTION [MZR-CD 2.2].)

Is there any malfunction?

Yes

Replace the common rail.

(See COMMON RAIL REMOVAL/INSTALLATION [MZR-CD 2.2].)

Go to the next step.

Inspect the engine compression.

(See COMPRESSION INSPECTION [MZR-CD 2.2].)

Is there any malfunction?

Yes

Inspect 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

Service if necessary.

Go to the next step.

Inspect the fuel injector.

(See FUEL INJECTOR INSPECTION [MZR-CD 2.2].)

Is there any malfunction?

Yes

Replace the fuel injector.

(See FUEL INJECTOR REMOVAL/INSTALLATION [MZR-CD 2.2].)

Go to the next step.

Inspect the timing chain for the following:

• Chipping of gear teeth

• Low tension

• Breakage damage or cracks

Is there any malfunction?

Yes

If the valve timing is incorrect:

• Adjust the valve timing.

If the timing chain is not normal:

• Replace the timing chain.

(See TIMING CHAIN REMOVAL/INSTALLATION [MZR-CD 2.2].)

Inspect the following:

• Clutch slippage

• CKP sensor

• Boost sensor and related circuit

• Brake system for dragging

― If there is any malfunction:

• Repair or replace the malfunctioning part according to the inspection results.

― If there is no malfunction:

• Remove the supply pump and common rail.

(See SUPPLY PUMP REMOVAL/INSTALLATION [MZR-CD 2.2].)

(See COMMON RAIL REMOVAL/INSTALLATION [MZR-CD 2.2].)

• Inspect the supply pump and common rail.

(See SUPPLY PUMP INSPECTION [MZR-CD 2.2].)

(See COMMON RAIL INSPECTION [MZR-CD 2.2].)

• Repair or replace the malfunctioning part according to the inspection results.

Verify test results.

• If normal, return to the diagnostic index to service any additional symptoms.

(See SYMPTOM DIAGNOSTIC INDEX [MZR-CD 2.2].)

• If the 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, reprogram the PCM if a later calibration is available. Retest.