NO.15 EMISSION COMPLIANCE [13B-MSP]

id0103f2802100

15

EMISSION COMPLIANCE
DESCRIPTION
Fails emissions test.
POSSIBLE CAUSE
•  Vacuum lines leakage or blockage
•  Cooling system malfunction
•  Spark plug malfunction
•  Leakage from intake manifold
•  Erratic signal from eccentric shaft position sensor
•  Inadequate fuel pressure
•  Exhaust system clogging
•  Fuel tank ventilation system malfunction
•  Charcoal canister damage
•  Air cleaner element clogging or restriction
•  Throttle body malfunction
•  Jet air mixing system line blockage
•  Spark leakage from high-tension leads
•  Improper air/fuel mixture ratio control operation
•  Catalyst converter malfunction
•  Engine internal parts malfunction
•  Excessive carbon is built up in combustion chamber
•  Improper engine compression
―  Engine internal malfunction
―  Abnormal engine oil condition (viscosity, deterioration)
―  Low oil pressure
―  Excessive fuel pressure
―  Air mixed in oil line
―  Metering oil pump malfunction
•  Leakage or clogging in oil pipe
•  Leakage or clogging in oil nozzle
Warning
The following troubleshooting flow chart contains fuel system diagnosis and repair procedures. Read the following warnings before servicing fuel system:
•  Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel.
•  Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete “BEFORE REPAIR PROCEDURE” and “AFTER REPAIR PROCEDURE” described in this manual.
Caution
•  Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.

Diagnostic procedure

STEP

INSPECTION

RESULTS

ACTION
1
Inspect for the following:
•  Vacuum lines for leakage or blockage
•  Jet air mixing system line blockage
•  Electrical connections
•  Proper maintenance schedule followed
•  Intake‐air system and air cleaner element concerns: obstructions, leakage or dirtiness
Are all the items normal?
Yes
Go to the next step.
No
Service if necessary.
Repeat Step 1.
2
Connect the M-MDS to the DLC-2.
Turn the ignition switch to the ON position (Engine off).
Retrieve any DTCs.
Are there any DTCs displayed?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [13B-MSP].)
No
Go to the next step.
3
Is any other drivability concern present?
Yes
Go to the applicable symptom troubleshooting.
(See SYMPTOM DIAGNOSTIC INDEX [13B-MSP].)
No
Go to the next step.
4
Connect the M-MDS to the DLC-2.
Access the ECT PID.
Warm up the engine and run it at idle.
Verify the ECT PID is correct.
(See PCM INSPECTION [13B-MSP].)
Is the ECT PID correct?
Yes
Go to the next step.
No
Inspect for coolant leakage, cooling fan operation or thermostat operation.
5
Is a strong blue spark visible at each disconnected high‐tension lead while cranking the engine?
Yes
Inspect for the following:
•  Spark plugs malfunction
•  Improperly installed eccentric shaft position sensor
•  Damaged trigger wheel on eccentric shaft
•  Open or short circuit on eccentric shaft position sensor
•  Open or short circuit between eccentric shaft position sensor and PCM terminal 2AG and 2AP
Repair or replace the malfunctioning parts.
If normal, go to the next step.
No
Inspect the following:
•  High‐tension leads
•  Ignition coil and connector
6
Disconnect the t fuel line quick release connector and install the fuel gauge to the fuel line.
Start the engine and run it at idle.
Measure the fuel line pressure at idle.
Is the fuel line pressure correct at idle?
(See FUEL LINE PRESSURE INSPECTION [13B-MSP].)
Yes
Go to the next step.
No
Zero or low:
Inspect for clogged fuel line.
If normal, replace the fuel pump unit.
(See FUEL PUMP UNIT REMOVAL/INSTALLATION [13B-MSP].)
High:
Replace the fuel pump unit.
(See FUEL PUMP UNIT REMOVAL/INSTALLATION [13B-MSP].)
7
Inspect for fuel saturation inside the charcoal canister.
Is there an excess amount of liquid fuel present in the charcoal canister?
Yes
Replace the charcoal canister.
(See CHARCOAL CANISTER REMOVAL/INSTALLATION [13B-MSP].)
No
Inspect the fuel tank vent system.
Then, go to the next step.
8
Inspect for restriction and leakage at the catalytic converter.
Is there any restriction or leakage at the catalytic converter?
Yes
Go to the next step.
No
Replace the catalytic converter.
9
Inspect the engine compression.
(See COMPRESSION INSPECTION [13B-MSP].)
Is it normal?
Yes
Visually inspect the exhaust system part.
No
Go to the next step.
10
Perform the metering oil pump control inspection.
(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [13B-MSP].)
Does the metering oil pump control operate properly?
Yes
Go to the next step.
No
Repair or replace the malfunctioning part according to the inspection results.
After that overhaul or replace the engine.
11
Check the engine oil condition.
Is the engine oil low viscosity and/or is there a gasoline odor?
Yes
Replace the engine oil.
After that overhaul or replace the engine.
No
Go to the next step.
12
Inspect the oil pressure.
(See OIL PRESSURE INSPECTION [13B-MSP].)
Is the oil pressure within the specification?
Yes
Go to the next step.
No
Repair or replace the malfunctioning part according to the inspection results.
After that overhaul or replace the engine.
13
Check the oil pipe between the metering oil pump and the metering oil nozzle.
Is there air and/or clogging in the oil pipe?
Yes
Inspect and repair for leakage and/or clogging in the oil passage a the t engine.
After that overhaul or replace the engine.
No
Overhaul or replace engine.
14
•  Verify test results.
―  If normal, return to the diagnostic index to service any additional symptoms.
―  If the malfunction remains, inspect the related Service Bulletins and/or the On-line Repair Information and perform the repair or diagnosis.