Specifications

F226
TROUBLESHOOTING
6 Carry out fuel line pressure inspection.
Is fuel line pressure correct?
Yes Inspect fuel injector for following:
• Open or short in injector
• Leakage
• Injection volume
No Zero or low:
Inspect fuel pump circuit.
Inspect for fuel pump relief valve open.
Inspect for fuel leakage inside pressure regulator.
Inspect for clogged main fuel line.
High:
Inspect pressure regulator for high pressure cause.
Inspect for clogged fuel return line.
7 Inspect spark plug for following.
• Heat range
• Air gap
Is spark plug okay?
Yes Go to next step.
No Replace spark plug.
8 Remove suspected fuel injector.
Inspect following:
• Resistance
(See F31 FUEL INJECTOR INSPECTION.)
• Fuel injection volume
(See F31 FUEL INJECTOR INSPECTION.)
Are all above items okay?
Yes Inspect for open circuit between suspected fuel injector
connector terminal and PCM connector following
terminals:
• For #1 or #4 cylinder: 1A
• For #2 or #3 cylinder: 1B
No Replace fuel injector.
9 Is air cleaner element free of restrictions? Yes Go to next step.
No Replace air cleaner element.
10 Carry out spark test.
Is strong blue spark visible at each cylinder?
Yes Go to next step.
No Repair or replace malfunctioning parts.
11 Carry out fuel line pressure inspection.
Is fuel line pressure correct?
(See F20 FUEL LINE PRESSURE
INSPECTION)
Yes Go to next step.
No Zero or low:
Inspect for clogged fuel line.
If okay, replace fuel pump unit.
High:
Replace fuel pump unit.
12 Inspect following PIDs.
• ECT
• O2S11 (When engine can be started)
• MAF
(See F45 PCM INSPECTION.)
Are PIDs okay?
Yes Go to next step.
No Repair or replace malfunctioning parts.
13 Carry out purge control inspection.
(When engine can be started)
(See F233 Purge Control System Inspection.)
Is purge control correct?
Yes Go to next step.
No Repair or replace malfunctioning parts.
14 Carry out compression inspection.
Is compression correct?
Yes Inspect for clogging in exhaust system.
No Repair or replace malfunctioning parts.
15 When engine cannot be started, inspect intake-
air system for air leakage.
When engine can be started, carry out intake
manifold vacuum inspection.
Is air sucked in from intake-air system?
Yes Repair or replace malfunctioning part.
No Go to next step.
16 Carry out fuel line pressure inspection.
Is fuel line pressure correct?
(See F20 FUEL LINE PRESSURE
INSPECTION)
Yes Inspect following PIDs.
• ECT
• O2S11
• MAF
(See F45 PCM INSPECTION.)
Inspect PCM GND condition.
No Zero or low:
Inspect for clogged fuel line.
If okay, replace fuel pump unit.
High:
Replace fuel pump unit.
17 Verify test results.
• If okay, return to diagnostic index to service any additional symptoms.
• If malfunction remains, replace or reprogram PCM.
STEP INSPECTION RESULTS ACTION