按症状排除故障

症状

• 引擎转速升高但加速无相应提升
• 变速箱在所有车速下发出啸叫或嗡嗡声
• 间歇性失去动力，尤其在负载情况下
• 仪表盘上的 CVT 警告灯亮起

原因

CVT 钢带和皮带轮会随使用时间磨损，尤其是未按建议间隔更换 CVT 油液时。 高温驾驶条件（交通拥堵、山路驾驶）会加速磨损。

解决方案

早期阶段：更换 CVT 油液可能恢复部分功能。 严重磨损：需要更换 CVT 钢带或整个 CVT 总成。 在问题变得严重之前，请咨询 Proton 专家进行 CVT 检查。

预估费用:~RM 2,500·昂贵·未注明计价方式 · 未注明日期

症状

• Air from vents barely cools, especially in noon traffic
• Compressor clutch not engaging or engages only intermittently
• Cooling collapses when the engine idles
• Blower works fine but cabin never gets cold

原因

The most commonly reported Iriz aircond faults split into three groups: low refrigerant from O-ring or hose leaks, a worn compressor with the magnetic clutch slipping or failing (a fault repeatedly covered by Malaysian repair channels for this model), and a dirty or damaged condenser that cannot reject heat in Malaysian traffic. Age matters; units older than 6 years accumulate several of these at once.

解决方案

Start with the cheap diagnosis. Have a workshop machine a pressure test and UV leak check, then clean the condenser fins. Regas with measured charge if the system holds pressure. If the compressor clutch slips or will not engage, replace the compressor; new OEM units and reconditioned units are both widely available. Replace the receiver-drier whenever you open the system so the new refrigerant stays dry.

预估费用:~RM 350·中等·未注明计价方式 · 未注明日期

症状

• 从静止加速时犹豫不决或前冲
• 低速时（10-30公里/小时）的颤抖感
• 在交通中CVT的‘橡皮筋’效应感觉被放大

原因

Iriz使用的Punch CVT为燃油效率而调校，这导致了明显的橡皮筋效应。 低速颤抖可能因CVT油液劣化或CVT钢带磨损而加剧。在大多数情况下， 这是变速箱的特性而非故障。

解决方案

对于轻微顿挫：确保CVT油液是新鲜的（每60,000公里更换一次）。 对于持续颤抖：排出CVT油液并重新加注Idemitsu CVTF NS-2通常能改善状况。 如果问题在100,000公里后仍然存在，请检查CVT钢带是否磨损。

预估费用:~RM 200·便宜·未注明计价方式 · 未注明日期

症状

• Fan speed 1, 2 and 3 do nothing, only speed 4 moves air
• Blower cuts out after a few minutes on low speed then comes back
• Air is cold on speed 4 but the cabin stays stuffy because the fan is loud and harsh
• Sometimes the fan works, then dies when the car goes over a bump

原因

The blower resistor pack, a small module on the blower housing, controls the lower fan speeds. When its coils or thermal fuse fail, the motor only gets full power, so speed 4 becomes the only working setting. It is a wear item on the Iriz the same way it is on the Saga BLM and Persona, and the parts are shared across those cars.

解决方案

Ask the workshop to test the resistor pack before touching the blower motor. A failed pack is a small part and a short job behind the glovebox area. If the motor is also noisy or stiff, replace it at the same time, because a dragging motor is what cooks the new resistor. Do not accept a quote for a whole aircond system off this symptom.

预估费用:~RM 130·便宜·未注明计价方式 · 未注明日期

症状

• Vibration through the cabin and steering wheel at idle
• Knocking or clunk when moving from Park into Drive
• Shunt or jerk on CVT take-up from a standstill
• Engine visibly rocks in neutral when revving

原因

The Iriz's rubber engine mounts compress and crack with age and heat cycles, and engine mount deterioration is one of the commonly listed complaints for this model in Malaysian ownership write-ups. City stop-go driving and low-speed CVT torque reversals load the mounts hard. The upper and left-side mounts typically show deterioration first.

解决方案

Replace the worn mount or mounts. Ask the workshop to inspect every mount while the car is up, not just the one that failed, because they age together and a dead mount loads the rest harder. Expect around RM280; confirm whether that covers one mount or the set. If you supply the part yourself, say so, and have the same shop re-check the mount after a week of driving. Genuine or good aftermarket rubber restores the original NVH; stiff performance bushings trade that comfort for more cabin vibration.

预估费用:~RM 280·中等·未注明计价方式 · 未注明日期

症状

• Single dull knock from a front corner as the wheel drops off a speed bump
• Knock on rough road at low speed, quiet on smooth highway
• Steering feels vague or clicks slightly when turning at parking speed
• Noise worse with a passenger in the car or a full boot

原因

The front strut mount and its bearing sit at the top of each strut and take the road load into the body. The rubber in the mount perishes, and the bearing dries out, so the strut can move a millimetre or two and knock. The Iriz carries a lot of weight on the front axle for a small hatch, and Malaysian road surfaces speed the process up.

解决方案

Have the workshop check both front strut mounts and bearings, not one. If the mount rubber is cracked or the bearing feels rough when the strut is out, replace the pair. Ask for the mount and bearing to be quoted separately from the strut, because the strut often does not need replacing. An alignment after the job is normal and should be in the quote.

预估费用:~RM 420·中等·配件与工时 · 未注明日期

症状

• Driver's side window moves slowly or stops halfway
• Switch clicks but the window does not move
• Window drops or tilts when closing (regulator misalignment)
• Grinding noise as the window travels

原因

Early pre-facelift Iriz models (roughly 2014 to 2018) used a window regulator and motor assembly that wears ahead of schedule, particularly on the driver's door which cycles most often. Owners across Malaysian owner groups and forums report repeated failures on first-generation examples, to the point where Proton covered the power window system (regulator, motor, switches and run channel) under a specific warranty clause in its service booklets and later extended window-side coverage across its range.

解决方案

Replace the window regulator assembly with motor. Parts are widely listed for the driver's side as a single unit. After replacement, lubricate the window run channel with silicone spray and reset the anti-pinch function if fitted. If the car is still inside its warranty period, claim at a Proton service centre first; window regulators were commonly replaced there without charge on this fault.

预估费用:~RM 220·中等·未注明计价方式 · 未注明日期

症状

• 在颠簸路面上行驶时，仪表台区域发出咔嗒异响
• A柱饰板发出吱吱声
• 中控台松动感或门内饰板振动

原因

早期生产的Iriz车型（2014-2018款）存在装配工艺问题， 内饰饰板卡扣和仪表台面板未能牢固固定。A柱饰板在高速 行驶时尤其容易产生振动。

解决方案

在饰板背面的接触点粘贴带背胶的毛毡胶带。更换损坏的 塑料卡扣（可从Proton经销商处购买，单价不到RM5）。 针对A柱异响，拆下饰板后在卡扣与金属柱之间加装泡沫垫。

预估费用:~RM 15·免费·未注明计价方式 · 未注明日期

症状

• Damp, sour or gym-bag smell in the first minute after switching the aircond on
• Smell fades once the fan has run for a while
• Worse after the car has sat in the rain or overnight
• Window misting more than usual on humid evenings

原因

Damp dust and pollen sit on the cabin filter and the evaporator core, and the cool, dark airbox is a good place for mould. Malaysian humidity does the rest. A filter that has been in the car for two years or more is the usual starting point, and the Iriz filter is behind the glovebox where owners never see it.

解决方案

Replace the cabin filter first, then have the evaporator cleaned and the drain checked if the smell returns within a month. Proton sells a standard filter and an N95 version. Ask for the filter by part number rather than by model year, because sellers list two versions and one comes with a holder bracket. Run the fan on fresh air for a minute before switching the aircond off at the end of a trip, which dries the core.

预估费用:~RM 90·便宜·未注明计价方式 · 未注明日期

症状

• Engine sits near 3,500 rpm at 110 km/h in fifth
• Noticeable engine drone on long highway drives
• Feels like a gear is missing above fifth
• Fuel use on the highway is not much better than in town

原因

The five-speed manual was geared for town work, not for cruising. Fifth is short enough that highway speed keeps the engine high in its rev range, which is why the manual Iriz is fun on a back road and tiring on a drive to Penang. Nothing is broken. It is the ratio in the box.

解决方案

No repair exists, and none is needed. Check the revs against speed on a test drive so you know what you are buying, and check the clutch does not slip under load in fourth at low speed, because a slipping clutch can feel like the same symptom at first. Treat the drone as a buying decision rather than a fault.

预估费用:~RM 0·免费·未注明计价方式 · 未注明日期

症状

• Soft knock or thud from behind the rear seat over patched tarmac
• Rear feels loose or steps sideways slightly when cornering hard
• Clunk when one rear wheel drops into a drain cut
• Tyres wearing unevenly on the inside edge at the back

原因

The Iriz runs a torsion beam at the rear, mounted on two trailing arm bushes. Those bushes take every sideways load and they crack and soften with age, which lets the beam move in its mounts. The noise sounds like a loose spare wheel or a body rattle, which is why it gets chased in the wrong place first.

解决方案

Ask for the rear trailing arm bushes to be checked with the car on a lift, and for the boot floor and spare wheel to be checked at the same time so you know which noise you are chasing. Worn bushes are replaced as a pair. An alignment afterwards is worth the money because a shifting beam changes rear toe.

预估费用:~RM 340·中等·未注明计价方式 · 未注明日期