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NO.15 KNOCKING/PINGING [MZR-CD (RF Turbo)]

id0103f1821300

15 | KNOCKING/PINGING
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DESCRIPTION | • Excessive shrilly knocking sound from engine.
POSSIBLE CAUSE | • Poor fuel quality • Air leakage from intake-air system • Intake-air system restriction or clogging • Variable boost control (VBC) system malfunction • Intake shutter valve stuck close • Glow system malfunction • Low engine compression • Improper valve timing • Low coolant temperature • Incorrect fuel injection timing • Erratic signal from CKP sensor • Erratic signal from CMP sensor • ECT sensor or related circuit malfunction • MAF/IAT sensor or related circuit malfunction • IAT sensor No.2 or related circuit malfunction • Boost sensor or related malfunction • Fuel pressure sensor or related circuit malfunction • Accelerator pedal position (APP) sensor or related circuit malfunction • Excessive fuel pressure • Fuel return line clogging or restriction • EGR system malfunction • Exhaust system and/or oxidation catalytic converter restriction • Turbocharger malfunction • Charge air cooler malfunction • Suction control valve malfunction (built-in supply pump) 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 REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual.

Diagnostic Procedure

STEP | INSPECTION | RESULTS | ACTION
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1 | Does the engine run cold? | Yes | Go to symptom troubleshooting "NO.20 COOLING SYSTEM CONCERNS-RUNS COLD [MZR-CD (RF-Turbo)]".
No | Go to the next step.
2 | Inspect the following: • Fuel quality (e.g.: including water contamination, winter/summer blend) • Fuel return line clogging and/or restriction • Intake-air system restriction or clogging • Exhaust system and/or oxidation catalytic converter restriction or clogging • Charge air cooler condition (restriction or damaged) Are all items normal? | Yes | Go to the next step.
No | Service if necessary. Repeat Step 2.
3 | Connect the WDS or equivalent to the DLC-2. Access ECT PID. Verify that the ECT PID is above 80 °C {176 °F}? | Yes | Go to the next step.
No | Inspect the ECT PID.
4 | Perform the self-test function using the WDS or equivalent. Turn the engine switch to the ON position. Retrieve any DTCs. Are any DTCs displayed? | Yes | DTC is displayed: Go to the appropriate DTC test. (See DTC TABLE [MZR-CD (RF Turbo)].) Communication error message is displayed: Inspect the following: • Open circuit between PCM control relay and PCM terminal 119 or 120 • Open circuit PCM control relay and PCM terminal 105 • PCM control relay stuck open • Open or poor ground circuit (PCM terminal 1, 2, 3, 114 or 117) • Poor connection to vehicle body ground
No | No DTC is displayed: Go to the next step.
5 | Inspect the intake shutter valve operation. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR-CD (RF Turbo)].) Is there any malfunction? | Yes | Repair or replace if necessary.
No | Go to the next step.
6 | Inspect the guide blade valve operation. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR-CD (RF Turbo)].) Is there any malfunction? | Yes | Repair or replace if necessary.
No | Go to the next step.
7 | 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 hose bands. If the concern is resolved, the inspection is complete. If the concern still exists, go to the next step.
No | Go to the next step.
8 | Inspect for improper operation, kinks, clogging or disconnection on the guide blade actuator. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR-CD (RF Turbo)].) Is the actuator normal? | Yes | Go to the next step.
No | Repair or replace if necessary. If the concern is resolved, the inspection is complete. If the concern still exists, the turbocharger is normal. Go to the next step.
9 | Remove parts necessary to inspect the turbocharger. Do not remove the turbocharger. Inspect if the turbocharger compressor wheel is bent, damaged, or interfering with housing on vehicle. (See TURBOCHARGER INSPECTION [MZR-CD (RF Turbo)].) Is there any malfunction? | Yes | Replace turbocharger.
No | Go to the next step.
10 | Inspect if turbocharger compressor wheel locknut is loose or has fallen down inside the turbocharger. Is there any malfunction? | Yes | Replace turbocharger.
No | Go to the next step.
11 | Inspect the turbocharger compressor wheel by hand. Does the wheel turn easily and smoothly? | Yes | Go to the next step.
No | Replace the turbocharger.
12 | Inspect if the turbocharger turbine wheel is damaged, cracked or interfering with housing on vehicle. Note • Inspect all fins on each turbine wheel. Is there any malfunction? | Yes | Replace the turbocharger.
No | Go to the next step.
13 | Is any engine oil found inside the turbocharger turbine housing? | Yes | Excessive amount of oil is found: Replace the turbocharger. Small amount of oil is found: Wipe oil off of vehicle, then go to the next step.
No | Go to the next step.
14 | Is any engine oil found inside the turbocharger compressor housing? | Yes | Wipe oil off of the vehicle and install all removed parts in Step 10. Then, go to the next step.
No | Turbocharger is normal. Install all parts removed in Step10. Then, go to the next step.
15 | Perform the EGR system inspection. Is the EGR system normal? | Yes | Go to the next step.
No | Repair or replace the malfunctioning part according to EGR system operation results.
16 | Inspect the glow system operation. (See RELAY INSPECTION.) Is the glow system operation normal? | Yes | Go to the next step.
No | Repair or replace the malfunctioning part according to glow system operation results.
17 | Visually inspect the CKP sensor and the teeth of the pulse wheel. Are the CKP sensor and the teeth of the pulse wheel normal? | Yes | Go to the next step.
No | Replace malfunctioning parts.
18 | Measure the gap between CKP sensor and the teeth of the pulse wheel. Specification 1.5-2.5 mm {0.059-0.098 in} Is the gap within the specification? | Yes | Go to the next step.
No | Adjust CKP sensor position.
19 | Visually inspect the CMP sensor and the teeth of the pulse wheel. Are the CMP sensor and the teeth of the pulse wheel normal? | Yes | Inspect the following PIDs: (See PCM INSPECTION [MZR-CD (RF Turbo)].) • ECT • IAT • MAF • MAP • RPM If the PID value is not as specified, repair or replace malfunctioning parts. If the PID value is normal, go to the next step.
No | Replace malfunctioning parts.
20 | Is the engine compression correct? (See COMPRESSION INSPECTION [MZR-CD (RF Turbo)].) | Yes | Go to the next step.
No | 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.
21 | Inspect the suction control valve. (See SUCTION CONTROL VALVE INSPECTION [MZR-CD (RF Turbo)].) Is the suction control valve normal? | Yes | Inspect the following: • Boost sensor • MAF/IAT sensor • IAT sensor No.2 • Fuel pressure sensor • APP sensor
No | Replace the supply pump. (See SUPPLY PUMP REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
22 | Verify test results. • If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [MZR-CD (RF Turbo)].) • If the malfunction remains, inspect the related Service Information and perform repair or diagnosis. - If the vehicle is repaired, troubleshooting completed. - If the vehicle is not repaired or additional diagnostic information is not available, reprogram the PCM if later calibration is available. Retest.