TORQDEX // DIAGNOSTIC SYSTEM

Automotive Diagnostics

Start with the symptom. Narrow the possibilities. Test before replacing parts.

SEARCH DIAGNOSTICS

01 // SELECT SYSTEM

Where is the problem?

Choose the system that best matches the vehicle symptom.

SYS-01

Starting & Charging

No-crank, slow-crank, dead battery, starter, alternator, and charging-system problems.

VIEW SYSTEM → SYS-02

Electrical

Battery drains, voltage drop, wiring faults, relays, fuses, and electrical testing.

VIEW SYSTEM → SYS-03

Engine Performance

Misfires, rough idle, hesitation, stalling, fuel delivery, ignition, and compression.

VIEW SYSTEM → SYS-04

Fuel / Air / Intake

Lean and rich conditions, airflow faults, fuel pressure, vacuum leaks, injector, and EVAP problems.

VIEW SYSTEM → SYS-05

Cooling System

Overheating, cooling-fan faults, thermostat issues, and coolant-flow problems.

VIEW SYSTEM → SYS-06

Brakes

Pulsation, vibration, pulling, noise, pedal problems, and brake-system diagnosis.

VIEW SYSTEM → SYS-07

Drivability

Highway vibration, acceleration problems, poor response, and abnormal driving behavior.

VIEW SYSTEM →

SYS-01

Starting & Charging

Diagnose battery, starter, alternator, cable, and starting-control problems.

01 Car Cranks But Won't Start 02 Car Clicks Once But Won't Start 03 Car Clicks Repeatedly But Won't Start 04 No Crank, No Start 05 Engine Cranks Slowly 06 Car Only Starts With a Jump 07 Battery Keeps Dying 08 Battery Light / Charging System Warning 09 Alternator Not Charging

SYS-02

Electrical Diagnostics

Electrical

Work through electrical faults using measurements instead of guesswork.

01 Fuse Keeps Blowing 02 Circuit Has No Power 03 Bad Ground / Ground Circuit Problem 04 Relay Not Working 05 Intermittent Electrical Problem 06 5-Volt Reference Circuit Problem 07 CAN Bus / Module Communication Problem 08 Lights Dim or Flicker

SYS-03

Engine Performance

Diagnose fuel, ignition, air, compression, and engine-management problems.

01 Engine Misfires at Idle 02 Engine Misfires Under Load 03 Rough Idle When Cold 04 Rough Idle When Warm 05 Engine Stalls When Stopping 06 Car Hesitates Under Acceleration 07 Low Power / Poor Acceleration 08 Poor Fuel Economy

SYS-04

Fuel, Air & Intake Diagnostics

Diagnose lean and rich conditions, airflow problems, fuel-pressure faults, vacuum leaks, injector issues, and EVAP purge problems.

01 Engine Running Lean 02 Engine Running Rich 03 MAF Sensor / Airflow Problems 04 Low Fuel Pressure 05 High Fuel Pressure 06 Vacuum Leak 07 Fuel Injector Problems 08 EVAP Purge Valve Problems

SYS-05

Cooling System

Diagnose overheating and cooling-system faults logically before replacing parts.

01 Car Overheats at Idle But Not Driving 02 Car Overheats While Driving 03 Cooling Fan Not Turning On 04 Coolant Keeps Disappearing 05 Engine Runs Too Cool 06 Coolant Boils Over / Overheats After Shutoff

SYS-06

Brake Diagnostics

Identify common brake-system symptoms and likely mechanical causes.

01 Brake Pedal Feels Soft 02 Brake Pedal Sinks to Floor 03 Brake Pedal Is Hard 04 Vehicle Pulls While Braking 05 Brake Vibration or Pulsation 06 Grinding Brake Noise 07 Squealing Brake Noise 08 Brake Fluid Leak 09 One Wheel Overheating 10 Parking Brake Not Holding 11 ABS Light On 12 ABS Activates Unexpectedly

SYS-07

Drivability Diagnostics

Diagnose vehicle behavior that appears while accelerating, cruising, under load, or during changing road conditions.

01 Vehicle Surges While Driving 02 Jerking or Bucking at Cruise 03 Hesitation From a Stop 04 Delayed Throttle Response 05 Engine Bogs Under Load 06 Intermittent Loss of Power 07 Vehicle Enters Limp Mode 08 Stalls While Driving 09 RPM Fluctuates at Steady Speed 10 Poor Acceleration Only at Highway Speed 11 Engine Cuts Out Over Bumps 12 Drivability Problem Only When Hot