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 System Readiness Tests Access Procedure

On-Board System Readiness Tests Access Procedure




1. Connect the M-MDS to the DLC-2.
2. After the vehicle is identified, select the following items from the initialization screen of the M-MDS.
- When using the IDS (laptop PC)
1. Select "Powertrain".
2. Select "OBD Test Modes".
3. Select "Mode 1 Powertrain Data".
4. Select "PCM".

- When using the PDS (Pocket PC)
1. Select "OBDII Modes".
2. Select "Mode 1 Powertrain Data".
3. Select "PCM".

3. Then, select the "***SUP" and "**EVAL" PIDs in the PID selection screen.
4. Monitor those PIDs and check it system monitor is completed.

NOTE: If the on-board system readiness tests are not completed the PCM stores DTC P1000.