Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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On-Board Diagnostics With Scan Tool

On-Board Diagnostic With Scan Tool

NOTE: For detailed instruction and other diagnostic methods using the scan tool or equivalent, refer to the scan tool tester manual and Computers and Control Systems.

These Quick Tests should be used to diagnose the powertrain control module (PCM) and should be carried out in order.
^ Quick Test 1.0 - Visual Inspection
^ Quick Test 2.0 - Set Up
^ Quick Test 3.0 - Key On, Engine Off
^ Quick Test 4.0 - Continuous Memory Codes
^ Quick Test 5.0 - Key On, Engine Running (KOER)
^ Special Test Modes
- Wiggle Test Mode
- Output Test Mode
^ PCM Reset Mode
^ Clearing DTCs P1000
^ OBD II Drive Cycle
^ Other Scan Tool Features

For further information on other diagnostic testing features using the scan tool or generic scan tool, refer to Computers and Control Systems. Other diagnostic methods include the:
^ Parameter Identification (PID) Access Mode
^ Freeze Frame Data Access Mode
^ Oxygen Sensor Monitor Mode