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)

Or, hide this message: temporarily or permanently

Monitor Scantool Data





Monitor Scantool Data

1. Connect scantool to Data Link Connector (DLC).
2. Engine "ON".
3. Monitor the "AMBIENT TEMP.SENSOR" Parameter on the Scantool.




4. Are the DTC B1237 present and is parameter of "AMBIENT TEMP.SENSOR" fixed ?
** Parameter of "AMBIENT TEMP.SENSOR" will be fixed at 68 °F, if there is any fault in AMBIENT TEMP.SENSOR.
YES
1) Go to "W/Harness Inspection" procedure.
NO
1) Fault is intermittent caused by poor contact in the sensor's and/or A/C control unit's connector or was repaired and A/C control unit memory was not cleared.
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.