PROTON VE E.MAS Prevé / Suprima S 2012-2020

Variant identity

Model family

Prevé / Suprima S

Market/region

Southeast Asia

Period/status

2012-2020 • Status requires source verification

Platform/generation

P3 platform

Powertrain/energy/driveline

C sedan/hatch • 1.6 IAFM+/CFE; MT/CVT

Research focus: verify platform/generation, powertrain/energy/driveline and market-specific application identity against manufacturer/source records before applying parts, service procedures or chronic-fault claims.

System map

• A boost fault is not just the turbo; separate leaks, wastegate/VGT, vacuum/electric control, MAF/MAP and exhaust backpressure.
• HV battery, BMS, isolation, inverter, OBC/DC-DC, 12 V and thermal management are separate evidence chains.
• CVT, D-CVT, IVT and e-CVT are not the same mechanism; identify belt/chain, planetary, motor-generator and hydraulic architecture.
• For network faults, evaluate source ECU, gateway path, power/ground and wake/sleep behaviour together.

Measurement and verification sequence

1. During READY/charging, monitor pack temperatures, cell delta, isolation, 12 V and charging-power curve together.
2. Measure CAN-H/CAN-L bias and termination under the fault condition, not only key-on; capture message timing with source address.

Misdiagnosis traps

• Without leak and actuator-command verification, a healthy turbo can be replaced unnecessarily.
• Displayed range or one SoH value alone does not prove battery health.
• Wrong fluid/procedure or transmission-family identity distorts fault and fitment diagnosis.

Variant-specific system split

• On turbo-petrol architecture, load calculation, boost target/actual, lambda/fuel trim, ignition and knock control are compared in the same event window.
• In an EV, HV battery/BMS, contactor-HVIL/isolation, inverter-motor, OBC/DC-DC, 12 V and cooling circuits are separate evidence branches.
• CVT belt/chain-pulley architecture is not conflated with e-CVT planetary/motor-generator architecture.

Freeze frame / live data

• Freeze frame: first/last fault time, RPM, load, vehicle speed, system voltage, core temperatures and companion DTCs.
• Live data: calculated load, MAP/boost target-actual, throttle angle, lambda/O2, STFT/LTFT, ignition advance and knock retard.
• Electrified layer: SOC/SOH where available, cell delta, pack temperatures, HVIL/isolation, contactor permission, DC-DC output and 12 V voltage.
• Driveline: input/output speeds, commanded/actual ratio, clutch/TCC slip, fluid temperature, actuator/solenoid command and adaptations.

Root-cause split

• On lean/misfire/boost complaints, align fuel trim, lambda, ignition retard and boost deviation on one time base to separate air leak, fuel-delivery and ignition causes.
• For READY/charging faults, separate 12 V supply from the HV permission chain first; low 12 V can mimic contactor/HVIL/isolation faults.
• For battery performance, use cell delta, temperature spread and voltage deviation under load/charge instead of one SoH percentage alone.
• For CVT ratio faults, identify the architecture first; e-CVT motor-generator power split and belt/chain CVT hydraulic-pulley faults do not share the same diagnostic tree.

What should be verified first?

Model name alone is insufficient. Do not generalize parts fitment, chronic issues or service procedures until production period, market, platform/generation, powertrain, transmission and controller identity are matched.

Model family dossier → · Engine Atlas → · Transmission Atlas → · Recall →