Problem Symptoms Table

HINT:

When a malfunction is not confirmed by a DTC (Diagnostic Trouble Code) check and the cause of problem cannot be identified through a basic inspection, troubleshoot according to the priority order indicated in the table below.

SFI SYSTEM

SFI SYSTEM PROBLEM SYMPTOMS REFERENCE

Symptom	Suspected area	See example
Engine does not crank (Does not start)	1. Starter and starter relay	INSPECTION
Engine does not crank (Does not start)	2. Immobiliser system	HOW TO PROCEED WITH TROUBLESHOOTING
No initial combustion (Does not start)	1. ECM power source circuit	ECM POWER SOURCE CIRCUIT
	2. Ignition coil (w/ Igniter) circuit	DTC P0351 IGNITION COIL "A" PRIMARY / SECONDARY CIRCUIT: DTC P0352 IGNITION COIL "B" PRIMARY / SECONDARY CIRCUIT: DTC P0353 IGNITION COIL "C" PRIMARY / SECONDARY CIRCUIT: DTC P0354 IGNITION COIL "D" PRIMARY / SECONDARY CIRCUIT
	3. Fuel pump control circuit	FUEL PUMP CONTROL CIRCUIT
	4. Injector	DTC P0171 SYSTEM TOO LEAN (BANK 1); DTC P0172 SYSTEM TOO RICH (BANK 1)
Incomplete combustion (Does not start)	1. Fuel pump control circuit	FUEL PUMP CONTROL CIRCUIT
	2. Ignition coil (w/ Igniter) circuit	DTC P0351 IGNITION COIL "A" PRIMARY / SECONDARY CIRCUIT: DTC P0352 IGNITION COIL "B" PRIMARY / SECONDARY CIRCUIT: DTC P0353 IGNITION COIL "C" PRIMARY / SECONDARY CIRCUIT: DTC P0354 IGNITION COIL "D" PRIMARY / SECONDARY CIRCUIT
	3. Injector	DTC P0171 SYSTEM TOO LEAN (BANK 1); DTC P0172 SYSTEM TOO RICH (BANK 1)
Engine cranks normally but difficult to start	1. Starter signal circuit	DTC P0505 IDLE CONTROL SYSTEM MALFUNCTION; DTC P0511 IDLE AIR CONTROL CIRCUIT
	2. IAC valve circuit	IDLE AIR CONTROL VALVE
	3. Fuel pump control circuit	FUEL PUMP CONTROL CIRCUIT
	4. Ignition coil (w/ Igniter)	DTC P0351 IGNITION COIL "A" PRIMARY / SECONDARY CIRCUIT: DTC P0352 IGNITION COIL "B" PRIMARY / SECONDARY CIRCUIT: DTC P0353 IGNITION COIL "C" PRIMARY / SECONDARY CIRCUIT: DTC P0354 IGNITION COIL "D" PRIMARY / SECONDARY CIRCUIT
	5. Spark plug	INSPECTION
	6. Compression	ON-VEHICLE INSPECTION
	7. Injector	DTC P0171 SYSTEM TOO LEAN (BANK 1); DTC P0172 SYSTEM TOO RICH (BANK 1)
Difficult to start with cold engine	1. Starter signal circuit	DTC P0505 IDLE CONTROL SYSTEM MALFUNCTION; DTC P0511 IDLE AIR CONTROL CIRCUIT
	2. IAC valve circuit	IDLE AIR CONTROL VALVE
	3. Fuel pump control circuit	FUEL PUMP CONTROL CIRCUIT
	4. Injector	DTC P0171 SYSTEM TOO LEAN (BANK 1); DTC P0172 SYSTEM TOO RICH (BANK 1)
	5. Ignition coil (w/ Igniter)	DTC P0351 IGNITION COIL "A" PRIMARY / SECONDARY CIRCUIT: DTC P0352 IGNITION COIL "B" PRIMARY / SECONDARY CIRCUIT: DTC P0353 IGNITION COIL "C" PRIMARY / SECONDARY CIRCUIT: DTC P0354 IGNITION COIL "D" PRIMARY / SECONDARY CIRCUIT
	6. Spark plug	INSPECTION
Difficult to start with warm engine	1. Starter signal circuit	DTC P0505 IDLE CONTROL SYSTEM MALFUNCTION; DTC P0511 IDLE AIR CONTROL CIRCUIT
	2. IAC valve circuit	IDLE AIR CONTROL VALVE
	3. Fuel pump control circuit	FUEL PUMP CONTROL CIRCUIT
	4. Injector	DTC P0171 SYSTEM TOO LEAN (BANK 1); DTC P0172 SYSTEM TOO RICH (BANK 1)
	5. Ignition coil (w/ Igniter)	DTC P0351 IGNITION COIL "A" PRIMARY / SECONDARY CIRCUIT: DTC P0352 IGNITION COIL "B" PRIMARY / SECONDARY CIRCUIT: DTC P0353 IGNITION COIL "C" PRIMARY / SECONDARY CIRCUIT: DTC P0354 IGNITION COIL "D" PRIMARY / SECONDARY CIRCUIT
	6. Spark plug	INSPECTION
Abnormal fast idle (Poor idling)	IAC valve circuit	IDLE AIR CONTROL VALVE
High engine idling speed (Poor idling)	1. IAC valve circuit	IDLE AIR CONTROL VALVE
High engine idling speed (Poor idling)	2. ECM power source circuit	ECM POWER SOURCE CIRCUIT
Low engine idling speed (Poor idling)	1. IAC valve circuit	IDLE AIR CONTROL VALVE
	2. Fuel pump control circuit	FUEL PUMP CONTROL CIRCUIT
	3. Injector	DTC P0171 SYSTEM TOO LEAN (BANK 1); DTC P0172 SYSTEM TOO RICH (BANK 1)
Rough idling (Poor idling)	1. IAC valve circuit	IDLE AIR CONTROL VALVE
	2. Injector	DTC P0171 SYSTEM TOO LEAN (BANK 1); DTC P0172 SYSTEM TOO RICH (BANK 1)
	3. Ignition coil (w/ Igniter) circuit	DTC P0351 IGNITION COIL "A" PRIMARY / SECONDARY CIRCUIT: DTC P0352 IGNITION COIL "B" PRIMARY / SECONDARY CIRCUIT: DTC P0353 IGNITION COIL "C" PRIMARY / SECONDARY CIRCUIT: DTC P0354 IGNITION COIL "D" PRIMARY / SECONDARY CIRCUIT
	4. Compression	ON-VEHICLE INSPECTION
	5. Fuel pump control circuit	FUEL PUMP CONTROL CIRCUIT
Hunting (Poor idling)	1. IAC valve circuit	IDLE AIR CONTROL VALVE
	2. ECM power source circuit	ECM POWER SOURCE CIRCUIT
	3. Fuel pump control circuit	FUEL PUMP CONTROL CIRCUIT
Hesitation / Poor acceleration (Poor driveability)	1. Injector	DTC P0171 SYSTEM TOO LEAN (BANK 1); DTC P0172 SYSTEM TOO RICH (BANK 1)
	2. Fuel pump control circuit	FUEL PUMP CONTROL CIRCUIT
	3. Ignition coil (w/ Igniter) circuit	DTC P0351 IGNITION COIL "A" PRIMARY / SECONDARY CIRCUIT: DTC P0352 IGNITION COIL "B" PRIMARY / SECONDARY CIRCUIT: DTC P0353 IGNITION COIL "C" PRIMARY / SECONDARY CIRCUIT: DTC P0354 IGNITION COIL "D" PRIMARY / SECONDARY CIRCUIT
Muffler explosion, after fire (Poor driveability)	1. Ignition coil (w/ Igniter)	DTC P0351 IGNITION COIL "A" PRIMARY / SECONDARY CIRCUIT: DTC P0352 IGNITION COIL "B" PRIMARY / SECONDARY CIRCUIT: DTC P0353 IGNITION COIL "C" PRIMARY / SECONDARY CIRCUIT: DTC P0354 IGNITION COIL "D" PRIMARY / SECONDARY CIRCUIT
	2. Spark plug	INSPECTION
	3. Injector	DTC P0171 SYSTEM TOO LEAN (BANK 1); DTC P0172 SYSTEM TOO RICH (BANK 1)
Surging (Poor driveability)	1. Fuel pump control circuit	FUEL PUMP CONTROL CIRCUIT
	2. Spark plug	INSPECTION
	3. Injector	DTC P0171 SYSTEM TOO LEAN (BANK 1); DTC P0172 SYSTEM TOO RICH (BANK 1)
Engine stalls soon after starting	1. Fuel pump control circuit	FUEL PUMP CONTROL CIRCUIT
Engine stalls soon after starting	2. IAC valve circuit	IDLE AIR CONTROL VALVE
Engine stalls when accelerator pedal released	1. Injector	DTC P0171 SYSTEM TOO LEAN (BANK 1); DTC P0172 SYSTEM TOO RICH (BANK 1)
	2. IAC valve circuit	IDLE AIR CONTROL VALVE
	3. ECM	ECM
Engine stalls	IAC valve circuit	IDLE AIR CONTROL VALVE