ON-BOARD DIAGNOSTIC
F2–131
F2
Diagnostic procedure
STEP INSPECTION ACTION
1 VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has FREEZE FRAME DATA been recorded?
Yes Go to the next step.
No Record the FREEZE FRAME DATA on the repair order,
then go to the next step.
2 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Verify related service repair information
availability.
• Is any related repair information available?
Yes Perform repair or diagnosis according to the available
repair information.
• If the vehicle is not repaired, go to the next step.
No Go to the next step.
3 VERIFY CURRENT SIGNAL STATUS: IS
CONCERN INTERMITTENT OR CONSTANT?
• Connect the WDS or equivalent to the DLC-2.
• Clear the DTC from the PCM memory using
the WDS or equivalent.
• Perform the Drive Mode.
(See F2–39 OBD DRIVE MODE.)
• Is the PENDING CODE for this DTC present?
Yes Go to the next step.
No Intermittent concern exists.
Perform the “INTERMITTENT CONCERNS
TROUBLESHOOTING”.
4 INSPECT EGR SOLENOID VALVE (VACUUM)
CONNECTOR FOR POOR CONNECTION
• Turn the engine switch off.
• Disconnect the EGR solenoid valve (vacuum)
connector.
• Inspect for poor connection (such as damaged/
pulled-out pins, corrosion).
• Is there any malfunction?
Yes Repair or replace the terminal, then go to Step 10.
No Go to the next step.
5 INSPECT EGR SOLENOID VALVE (VACUUM)
POWER CIRCUIT FOR OPEN CIRCUIT
• Turn the engine switch to the ON position
(Engine off).
• Measure the voltage between EGR solenoid
valve (vacuum) terminal A (wiring harness-
side) and body GND.
• Is the voltage B+?
Yes Go to the next step.
No Repair or replace the wiring harness for a possible open
circuit or short to GND, then go to Step 10.
6 INSPECT EGR SOLENOID VALVE (VACUUM)
CONTROL CIRCUIT FOR SHORT TO GND
• Turn the engine switch off.
• Inspect for continuity between EGR solenoid
valve (vacuum) terminal B (wiring harness-
side) and body GND.
• Is there continuity?
Yes Repair or replace the wiring harness for a possible short to
GND, then go to Step 10.
No Go to the next step.
7 INSPECT EGR SOLENOID VALVE (VACUUM)
• Inspect the EGR solenoid valve (vacuum).
• Is there any malfunction?
Yes Replace the EGR solenoid valve (vacuum), then go to Step
10.
No Go to the next step.
8 INSPECT PCM CONNECTOR FOR POOR
CONNECTION
• Turn the engine switch off.
• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/
pulled-out pins, corrosion).
• Is there any malfunction?
Yes Repair or replace the terminal, then go to Step 10.
No Go to the next step.
9 INSPECT EGR SOLENOID VALVE (VACUUM)
CONTROL CIRCUIT FOR OPEN CIRCUIT
• Turn the engine switch off.
• Inspect for continuity between EGR solenoid
valve (vacuum) terminal B (wiring harness-
side) and PCM terminal 99 (wiring harness-
side).
• Is there continuity?
Yes Go to the next step.
No Repair or replace the wiring harness for a possible open
circuit, then go to the next step.
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