Continuous Test
- Unless instructed to do so, do not disconnect any sensor with key on or service codes will be stored. Should Keep Alive Power pin 1 to processor be interrupted, all stored Continuous codes will be lost. If pin 1 fails, invalid codes may be received during test.
- Correct method for clearing memory is to exit Key On - Engine Off Test during code output sequence. Exit test by removing self-test jumper. Before using stored information, first verify that previous tests indicated code 11.
- If during tests an On Demand code is detected, this must be repaired first, since some hard failures also request a code in the continuous memory. Once On Demand testing is complete, clear memory of Continuous codes and operate vehicle to verify repair.
- Before repairing any Continuous Test service codes, verify that a code 11 was received from both previous tests. Repair only those codes that are not repeated from previous tests.
- With vehicle prepared as in Key On - Engine Off Test, record all Continuous codes. Perform Key On - Engine Off Test. When first service code is output, exit test by removing jumper from self-test input to signal return pin 2. This will erase any Continuous codes.
- With test deactivated, key on and engine off, self-test output is checked. Wiggle system harness, connectors or sensors while observing VOM. A fault will be indicated by meter deflection of 10.5 volts or more, and a service code will be stored.
- After checking all system components, perform Key On - Engine Off Test to retrieve any codes stored during wiggle test. Remain in continuous monitor mode and service Continuous codes as follows:
NOTE:
Record all service codes before removing or replacing processor. Codes will be erased from memory whenever processor is disconnected.