Ford Mustang (1999-2004) Service Manual: Inspection and Verification
1. Verify the customer concern is with the evaporative emission (EVAP) system.
2. Visually inspect for the following obvious signs of mechanical damage.
Visual Inspection Chart
Mechanical |
|
3. If the concern remains after the inspection, connect the scan tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the scan tool menu. If the scan tool does not communicate with the vehicle:
- check that the program card is correctly installed.
- check the connections to the vehicle.
- check the ignition switch position.
4. If the scan tool still does not communicate with the vehicle, refer to the scan tool manual.
5. Carry out the DATA LINK DIAGNOSTICS test. If the scan tool responds with:
- CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to Section.
- NO RESP/NOT EQUIP for PCM, refer to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
- SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out the PCM KOEO self-test.
6. If the DTCs retrieved are related to the concern, go to the PCM Diagnostic Trouble Code (DTC) Index to continue diagnostics.
7. If the concern remains after the inspection, determine the symptom. GO to Symptom Chart .
PCM Diagnostics Trouble Code (DTC) Index
DTC | Description | Source | Action |
P0442 | Small leak detected in EVAP system (As small as 1.02 mm [0.040 inch]) | PCM | Go To Pinpoint Test A . |
P0455 | Major leak or no flow detected | PCM | Go To Pinpoint Test B . |
P0457 | Check for missing or leaking fuel filter cap | PCM | Go To Pinpoint Test A . |
P1443 | Very small or no purge flow detected | PCM | Go To Pinpoint Test B . |
P1450 | Excessive vacuum detected in the fuel tank | PCM | Go To Pinpoint Test C . |
- | Any other PCM DTC | PCM | REFER to the Powertrain Control/Emissions Diagnosis (PC/ED) manual. |
Symptom Chart
Condition | Possible Sources | Action |
|
|
|
|
|
|
|
|
|
Principles of Operation
Evaporative Emission (EVAP) Canister Purge Valve
The EVAP canister purge valve is controlled by the powertrain control
module (PCM). The EVAP
canister purge valve controls the flow of fuel vapors ...
Pinpoint Tests
NOTE: Reinstall or install new evaporative emission hose clamps
removed or damaged during testing
procedures.
PINPOINT TEST A: DTC P0442 SMALL LEAK IN EVAP SYSTEM
Test Step
Result / Action to ...
Other materials:
Exhaust Manifold RH
Special Tool(s)
Lifting Bracket, Engine
303-D088 (D93P-6001-A2)
Support Bar, Engine
303-290-A
Removal and Installation
1. Install the special tool.
2. Install the special tools.
3. Raise and support the vehicle. For additional ...
Transmission Fluid Cooler - Backflushing and Cleaning
1. CAUTION: Do not use any supplemental transmission fluid
additives or cleaning
agents. The use of these products could cause internal transmission
components to fail;
this will effect the operation of the transmission.
Conduct backflushing with a sui ...
Camshaft Roller Follower
Special Tool(s)
Compressor, Valve Spring
(Intake)
303-452 (T93P-6565-AR)
Compressor, Valve Spring
(Exhaust)
303-567 (T97P-6565-AH)
Removal
1. Remove the valve cover. For additional information, refer to Valve Cover
LH or Valv ...