MTC 37

37-ROM CHECKSUM ERROR (MTC)

WHEN MONITORED
With the ignition on.

SET CONDITION
If the calculated checksum does not match the stored value.

POSSIBLE CAUSES
- A/C heater control

NOTE: This DTC must be active for the results of this test to be valid. Do not perform this test if this DTC is stored. Refer to HVAC System Test (MTC) for stored DTC test procedures. HVAC System Test (MTC)

DIAGNOSTIC TEST
1. REPLACE THE A/C HEATER CONTROL

Repair
Replace the A/C Heater Control. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test