Vehicle Speed/RPM Messages Missing (Stored)

Test 1:

SYMPTOM
VEHICLE SPEED/RPM MESSAGE MISSING (STORED)

TEST NOTE
This symptom is diagnosed using the test AC PRESSURE TOO HIGH (STORED).

WHEN MONITORED
Every 8 seconds with the ignition ON.

SET CONDITION
This DTC is set if the ATC does not receive a vehicle speed or engine speed message within 8 seconds.

POSSIBLE CAUSES
- ATC module stored codes present
- Stored codes test complete