Actron CP9185 manual Diagnostic Codes Menu

GM Enhanced (OBD II) Diagnostics

✓If an Error Message displays, make sure the OBD II connector is securely attached, and the ignition key is on. Cycle the ignition key to off for 10 seconds, then on. This may be required to reset the computer. If required, select yes to try again. If the problem still exists, refer to Error Messages on page 8-2.

Diagnostic Codes Menu

IMPORTANT

All items marked with “-” are covered either in section 3 or 4. These items are not covered in this section.

❒ Diagnostic Codes Menu

❒ Read Codes

– Pending Codes

❒ Erase Codes

	– View Freeze Data
	– Review Data
	– Print Data
	– Code Lookup
5	– Tool Setup
	Read Codes

✓The Read Codes function retrieves DTCs from the vehicle’s computer module(s). This function can be performed with the KOEO or KOER. These codes cause the computer to illuminate the malfunction indicator lamp (MIL) when an emission-related or driveability fault occurs. The MIL is also known as the service engine soon or check engine lamp.

✓The GM Enhanced reads DTC’s from the engine or powertrain module (ENG), transmission module (TRANS), or transfer case module (XFER).

✓Not all GM vehicles support DTC status. Some only use the Global OBDII Read Codes command. For a description of these screens, refer to the Global OBD II Diagnostics section of the manual.

•History Codes — Intermittent codes placed in the vehicle’s memory when the trouble originally occurred, and will remain there even if the trouble has been corrected. If no trouble after 50 engine warm-up cycles, the DTC will be erased.

•Current Codes — Codes transmitted through the PCMs data stream when a trouble condition is active and cannot be erased. The problem must be repaired to remove the DTC.

•Intermittent Codes — Indicates the current code has been set at least once but possibly not enough to cause a history code to be stored.

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