Continuous Monitor (Wiggle) Test

The Self-Test Output (STO) will be activated each time a fault is detected. If the STO is activated long enough during the wiggle tests a service code will be stored. A fault is indicated by needle sweep deflection on analog Volt/Ohm Meter (VOM). The STAR tester LED will flash and/or sound an alarm signal when fault is recreated. The CONTINUOUS MONITOR (WIGGLE) TEST is used to attempt to recreate an intermittent fault.

• KEY ON/ENGINE OFF (KOEO) Test: Connect STAR tester or VOM. Turn ignition key to "ON" position. Activate, deactivate and reactivate SELF-TEST (3 steps) by connecting, disconnecting and reconnecting STI pigtail jumper. This procedure will place the system in Continuous Monitor Mode. Tap, move, and wiggle the suspected sensor and/or harness area. If a fault is detected, a service code will be stored in memory and will be indicated by VOM or diagnostic tester. Retrieve code and perform test indicated in CONTINUOUS SELF-TEST  table.
• ENGINE RUNNING Test: Start engine. Activate SELF-TEST, wait 10 seconds, deactivate, and then reactivate SELF-TEST. DO NOT  turn engine off. You are now in engine running Continuous Monitor Mode test mode. Tap, move, and wiggle the suspected sensor and/or harness area. If a fault is detected, a service code will be stored in memory and will be indicated by VOM or diagnostic tester. Retrieve code and perform test indicated in CONTINUOUS SELF-TEST  table.
  NOTE: An alternate method of entering CONTINUOUS MONITOR (WIGGLE) TEST with engine running is to start KOER SELF-TEST, exit, and re-enter KOER SELF-TEST without turning off engine. If alternate method is being used, perform the following steps.
  1. Observe VOM while moving, wiggling, and tapping system harness (in short sections), connectors, and sensors. If an intermittent condition is created, the monitor will indicate this by storing a service code. Carefully inspect harness and associated connectors of affected circuits.
  2. If an intermittent condition is not created, carefully disconnect sensor from harness. Remove terminals from connector and visually inspect terminals at both ends for corrosion, bad crimps, improperly seated terminals, etc.
  3. Reconnect harness after inspection. Disconnect ECA from harness as carefully as possible. Remove and inspect terminals associated with sensor being checked.
  4. If an intermittent condition cannot be created, plug-in connector and erase the CONTINUOUS SELF-TEST service codes. To erase service codes, activate KEY ON/ENGINE OFF (KOEO) SELF-TEST  .
  5. Remove jumper wire from Self-Test Input (STI) terminal as soon as first code appears. Repeat SELF-TEST with jumper to verify that service codes have been erased. QUICK TEST is complete.