Quick Test 5.0 - Key ON, Engine Running (KOER)

The Engine Running Diagnostic Test Mode provides "hard" DTCs only.

Some special considerations for Engine Running On-Board Diagnostic include the following:
- After the engine ID code (STO LO flashes), apply and release the brake pedal, turn steering wheel one-half turn and release, press and release the TCS (SHO only).
- If a DTC appears after the KOER test, a malfunction is present. Refer to and look up the DTC on the PCM On-Board Diagnostic Trouble Code Description Chart for service information.

Performing KOER Diagnostic Test

NOTE: Engine must be warm or DTC 116--ECT out of range will occur.

1. Connect SUPER STAR II Tester (if not already connected) with mode switch set to FAST mode.
2. Start and run engine until engine reaches operating temperature.
3. Turn OFF engine and wait 10 seconds.
4. Activate Diagnostic Test Mode (press center button on SUPER STAR II Tester).
5. Start engine.
a. On-Board Diagnostic begins when the engine ID code is received.
(This code consists of the number of cylinders divided by 2 plus an added zero.)
Numbers of Cylinders Engine ID Code
4 20
6 30
8 40
b. After the ID code is received, the technician must apply and release the service brake pedal to check stoplight switch, turn steering wheel one-half turn and release to check power steering pressure switch (PSP switch).
c. A single output pulse (10) is sent to signal the technician to quickly press the throttle to wide open and immediately release. SUPER STAR II Tester will display the word DYNAMIC.
d. Diagnostic Trouble Codes (DTCs) are then output.
6. The Engine Running wiggle test may be entered upon completion of the KOER Diagnostic Test Mode.

Special Test Mode
1. Wiggle test mode:
- After all KOER DTCs have been received the wiggle test mode may be entered by pressing center button of Star Tester twice. This will unlatch and latch STI.

The wiggle test allows the technician to attempt to re-create an intermittent malfunction. Tap, move and wiggle the suspected sensor and/or wire harness. When a malfunction is detected the STO will be turned on as long as the concern is present. STO ON will cause the SUPER STAR Tester II to sound a continuous tone. The malfunction indicator lamp (MIL) will also illuminate.