NOTE: Malfunction of parts other than those listed is also possible. Ref. to MECHANICAL (H4DOTC)>SYMPTOMS AND CAUSES .

Item		Reference
Engine does not start NOTE: Perform the diagnosis in the numerical order on the right.	1. Check fuel level	Check the fuel level.
	2. Check immobilizer	With Telematics: Ref. to TELEMATICS SYSTEM (DIAGNOSTICS)>Diagnostics with Phenomenon>INSPECTION>ENGINE WILL NOT START .
		Without Keyless Access with Push Button Start: Ref. to IMMOBILIZER (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE .
		With Keyless Access with Push Button Start: Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE .
	3. Check ECM power supply and ground line	Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Diagnostics with Phenomenon>CHECK POWER SUPPLY AND GROUND LINE OF ENGINE CONTROL MODULE (ECM) .
	4. Inspection of starter motor circuit	Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Diagnostics with Phenomenon>STARTER MOTOR CIRCUIT .
	5. Inspection of ignition control system	Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Diagnostics with Phenomenon>IGNITION CONTROL SYSTEM .
	6. Inspection of fuel pump circuit	Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Diagnostics with Phenomenon>FUEL PUMP CIRCUIT .
	7. Inspection of fuel injector circuit	Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Diagnostics with Phenomenon>FUEL INJECTOR CIRCUIT .
Brake override does not operate	Check brake override system	Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Diagnostics with Phenomenon>CHECK BRAKE OVERRIDE SYSTEM .

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Diagnostics with Phenomenon: List