Ariz. Admin. Code § R18-2-1010 - Low Emissions Tune-up, Emissions and Evaporative System Repair

A. Vehicle maintenance and repairs under subsection (B) and the failure-specific maintenance and repair requirements of subsection (C) must be performed before rein-spection of a vehicle that fails a tailpipe emissions or OBD test under R18-2-1006.

B. Vehicle maintenance and repairs on a non-diesel powered vehicle consists of the following procedures:

1. Emissions Failure Diagnosis. For a computer-controlled vehicle, the on-board computer shall be accessed and any stored trouble codes recorded. For a model year 1996 or newer vehicle equipped with an OBD system, a compatible scan tool shall be used to access and record diagnostic trouble codes. The following instruments or equipment are required to complete a low emissions tune-up:

a. Tachometer, although for 1996 and later vehicles an OBD scanner can be used to monitor engine RPMs;

b. A compatible OBD scan tool, if appropriate;

c. Engine analyzer or oscilloscope; and

d. A HC/CO NDIR analyzer to make final A/F adjustments, if specified by the manufacturer.

2. Adjustment. All adjustments shall be made according to the manufacturer's specifications and procedures. Final adjustment shall be made on the vehicle engine only after the engine is at normal operating temperature.

3. Inspection of Air Cleaner, Choke, and Air Intake System. The vehicle owner shall repair or replace a dirty or plugged air cleaner, stuck choke, or restricted air intake system as required.

4. Dwell and Basic Timing Check. Dwell and basic engine timing shall be checked and the vehicle owner shall make adjustments, if necessary, according to manufacturer's specifications.

5. Inspection of PCV System. The PCV system shall be checked to ensure that it is the type recommended by the manufacturer and is correctly operating. Free flow through the PCV system passages and hoses shall be verified. The vehicle owner shall repair or replace the system as required.

6. Inspection of Vacuum Hoses. The vacuum hoses shall be inspected for leaks, obstruction, and proper routing and connection. The vehicle owner shall repair or replace as required.

7. Fuel Lines and System Components Inspection. A visual inspection for leaking fuel lines or system components shall be performed. The vehicle owner shall repair or replace any leaking lines or systems as required.

8. Idle Speed and A/F Mixture Check. The idle speed and A/F mixture shall be checked and the vehicle owner shall make adjustments according to manufacturer's specifications and procedures. If the vehicle is equipped with a fuel injection system or an alternate fuel (LPG or LNG), the manufacturer's recommended adjustment procedure shall be followed.

B. A vehicle that fails reinspection does not qualify for a waiver unless a low emissions tune-up and diagnosis is performed on the vehicle.

C. Failure-specific recommended repairs and maintenance. If the maximum required repair cost in subsection (F) or (G) is not exceeded after the diagnosis and vehicle maintenance and repairs described in subsection (B), then the following procedures apply:

1. CO failure.

a. If a vehicle fails CO only, the vehicle shall be checked for:

i. Proper canister purge system operation,

ii. High float setting,

iii. Leaky power valve, and

iv. Faulty or worn needles, seats, jets or improper jet size.

b. If applicable, the vehicle shall be checked for the following items:

i. Computer,

ii. Engine and computer sensors,

iii. Engine solenoids,

iv. Engine thermostats,

v. Engine switches,

vi. Coolant switches,

vii. Throttle body or port fuel injection system,

viii. Fuel injectors,

ix. Fuel line routing and integrity,

x. Air in fuel system including line and pump,

xi. Fuel return system,

xii. Injection pump,

xiii. Fuel injection timing,

xiv. Routing of vacuum hoses, and

xv. Electrical connections.

c. The items in subsections (C)(1)(a) and (b) shall be repaired or replaced as required.

2. HC, or HC and CO failure.

a. If a vehicle fails HC, or HC and CO emissions, the vehicle shall be checked for:

i. Faulty spark plugs and faulty, open, crossed, or disconnected plug wires;

ii. Distributor module;

iii. Vacuum hose routing and electrical connections;

iv. Distributor component malfunctions including vacuum advance;

v. Faulty points or condenser;

vi. Distributor cap crossfire;

vii. Catalytic converter efficiency air supply;

viii. Vacuum leaks at intake manifold, carburetor base gasket, EGR, and vacuum-operated components.

b. The vehicle owner shall repair or replace the items in subsection (C)(2)(a) as required.

3. NOx failure.

a. If a vehicle fails for NOx emissions, the vehicle shall be checked for:

i. Removed, plugged, or malfunctioning EGR valve, exhaust gas ports, lines, and passages;

ii. EGR valve electrical and vacuum control circuitry, components, and computer control, as applicable;

iii. Above normal engine operating temperature;

iv. Proper air management;

v. Lean A/F mixture;

vi. Catalytic converter efficiency; and

vii. Over-advanced off-idle timing.

b. The items in subsection (C)(3)(a) shall be repaired or replaced as required.

4. OBD failure. If the vehicle fails the OBD test, the vehicle owner shall repair the items indicated on the vehicle emissions report as causing the failure. If the failure results from diagnostic trouble codes (DTCs) that caused the malfunction indicator lamp (MIL) to be illuminated, the vehicle owner shall repair or replace the components or systems causing the DTCs shall be repaired or replaced. After repair of a DTC failure, and before reinspection, the vehicle shall be operated under conditions recommended by the vehicle manufacturer for the OBD computer to evaluate the repaired system.

D. For Evaporative System Failures, the following procedures apply:

1. If a vehicle fails the evaporative system pressure test, the vehicle shall be checked for leaking or disconnected vapor hoses, line, gas cap, and fuel tank.

2. If a vehicle fails a visual inspection of the evaporative system, the vehicle shall be checked for a missing or damaged canister, canister electrical and vacuum control circuits and components, disconnected, damaged, misrouted or plugged hoses, and damaged or missing purge valves. The vehicle owner shall repair or replace the system with OEM or equivalent aftermarket parts.

E. If a vehicle fails the functional gas cap pressure test described in R18-2-1006, the vehicle owner shall replace the gas cap with one that meets the requirements of that subsection. If a vehicle designed with a vented system fails a visual inspection for the presence of a gas cap, the vehicle owner shall install a properly fitting gas cap on the vehicle.

F. The maximum required repair cost for a vehicle in Area A, not including cost to repair the vehicle for failing an evaporative system pressure test due to tampering, or other tampering repair cost, is:

1. For a diesel-powered vehicle with a GVWR greater than 26,000 pounds or a diesel-powered vehicle with tandem axles: $500; and

2. For a vehicle that is not a diesel-powered vehicle with a GVWR greater than 26,000 pounds and is not a diesel-powered vehicle with tandem axles:

a. Manufactured in or before the 1974 model year: $200;

b. Manufactured in the 1975 through 1979 model years: $300; and

c. Manufactured in or after the 1980 model year: $450.

3. Subsection (F) does not prevent a vehicle owner from authorizing or performing more than the required repairs. A vehicle operator who has a vehicle reinspected shall have the repair receipts available when requesting a certificate of waiver.

G. The maximum required repair cost for vehicles in Area B, not including tampering repair cost, is:

1. For a diesel-powered vehicle with a GVWR greater than 26,000 pounds or a diesel-powered vehicle with tandem axles: $300; and

2. For a vehicle that is not a diesel-powered vehicle with a GVWR greater than 26,000 pounds and is not a diesel-powered vehicle with tandem axles:

a. Manufactured in or before the 1974 model year: $50;

b. Manufactured in the 1975 through 1979 model years: $200; and

c. Manufactured in or after the 1980 model year: $300.

3. Subsection (G) does not prevent a vehicle owner from authorizing or performing more than the required repairs. A vehicle operator who has a vehicle reinspected shall have the repair receipts available when requesting a certificate of waiver.

H. Before reinspection of a diesel vehicle that has failed an inspection, the vehicle owner shall comply with the following maintenance and repair requirements to the extent that the total cost of meeting the requirements does not exceed the maximum required repair cost in subsection (F) or (G):

1. Inspect for dirty or plugged air cleaner, or restricted air intake system. Repair or replace as required.

2. Check fuel injection system timing according to manufacturer's specifications. Adjust as required.

3. Check for fuel injector fouling, leaking, or mismatch. Repair or replace as required.

4. Check fuel pump and A/F ratio control according to manufacturer's specifications. Adjust as required.

5. If the vehicle fails the J1667 procedure, check smoke-limiting devices, if any, including the aneroid valve and puff limiter. Repair or replace as required.

I. The vehicle owner shall use any available warranty coverage for a vehicle to obtain needed repairs before an expenditure can be counted toward the cost limits in subsection (F) and (G). If the operator of a vehicle within the age and mileage coverage of section 207(b) of the Clean Air Act presents a written denial of warranty coverage from the manufacturer or authorized dealer, warranty coverage is not considered available under this subsection.

Notes

Ariz. Admin. Code § R18-2-1010

Adopted effective January 13, 1976 (Supp. 76-1). Former Section R9-3-1010 repealed, new Section R9-3-1010 adopted effective January 3, 1977 (Supp. 77-1). Amended effective March 2, 1978 (Supp. 78-2). Amended effective January 3, 1979 (Supp. 79-1). Amended effective February 20, 1980 (Supp. 80-1). Amended as an emergency effective January 2, 1981, pursuant to A.R.S. § 41-1003, valid for only 90 days (Supp. 81-1). Former Section R9-3-1010 as amended effective February 20, 1980, and amended as an emergency effective January 2, 1981, now amended effective April 15, 1981 (Supp. 81-2). Amended effective January 1, 1986 (Supp. 85-6). Amended effective January 1, 1987, filed December 31, 1986 (Supp. 86-6). Former Section R9-3-1010 renumbered as Section R18-2-1010 and subsection (D) amended effective August 1, 1988 (Supp. 88-3). Amended effective November 14, 1994 (Supp. 94-4). Amended effective October 15, 1998 (Supp. 98-4). Amended by final rulemaking at 6 A.A.R. 382, effective December 20, 1999 (Supp. 99-4). Amended by final rulemaking at 8 A.A.R. 90, effective January 1, 2002 (Supp. 01-4). Amended by final rulemaking at 14 A.A.R. 2834, effective July 1, 2008 (Supp. 08-3). Amended by final rulemaking at 25 A.A.R. 485, effective 6/1/2019.