Quick Test Description

QUICK TEST DESCRIPTION

Quick Test

NOTE: Do not carry out consecutive quick tests without turning the ignition to the OFF position for a minimum of 15 seconds.

NOTE: Some faults within the hybrid-electric system may prevent the TCM from executing the KOEO on-demand self-test. When one or more of the following DTCs are stored in the TCM continuous memory the KOEO on-demand self-test is not executed: P0613, P0A90, P0A1B, P0A1A, P2806, P0A0A, and U0294.

The quick test is divided into three specialized tests:
(1) Key On Engine Off (KOEO) On-Demand Self-Test
(2) Key On Engine Running (KOER) On-Demand Self-Test
(3) Continuous Memory Self-Test

The quick test checks the integrity and function of the electronic engine control (EEC) system, and the hybrid-electric system. The results of the quick test are requested and displayed on the scan tool. The quick test also provides a quick end check of both the powertrain control system and the hybrid-electric system. It is usually carried out at the start of each diagnostic procedure with all accessories off. The quick test is also carried out at the end of most pinpoint tests for verification of the repair and to make sure no other faults were incurred while repairing a previous fault. A system pass is displayed when no diagnostic trouble codes (DTCs) are output and a scan tool communication error does not exist. System pass means that hardware monitored by the powertrain control module (PCM) or the transaxle control module (TCM) is functioning within the normal operating limits. Only a system pass, a DTC, or an incomplete on board diagnostic (OBD) drive cycle (P1000) is displayed.

Key On Engine Off (KOEO) On-Demand Self-Test
The KOEO on-demand self-test is a functional test of the PCM or the TCM, and is carried out on demand with the ignition in the ON position and the engine off. This test carries out checks on certain input and output circuits. A fault must be present at the time of testing for the KOEO self-test to detect the fault. When a fault is detected, a DTC is output on the data link at the end of the test when requested by a scan tool. The KOEO on-demand self-test can be executed with the gear selector in PARK only.

Key On Engine Running (KOER) On-Demand Self-Test
The KOER on-demand self-test is a functional test of the PCM, and is carried out on-demand with the ignition in the START position, the engine running and the vehicle stopped. A check of certain inputs and outputs is made during operating conditions and at a normal temperature. The brake pedal position (BPP) test is a part of the KOER on-demand self-test and must be carried out during this operation. A fault must be present at the time of testing for the KOER on-demand self-test to detect the fault. When a fault is detected, a DTC is output on the data link at the end of the test when requested by a scan tool. The KOER on-demand self-test can be executed with the gear selector in PARK only.

Brake Pedal Position (BPP) Test
This tests the ability of the EEC system to detect a change of state in the BPP switch. The brake pedal must be briefly applied and released on all vehicles equipped with a BPP input. This is done during a KOER on-demand self-test.

Continuous Memory Self-Test

NOTE: In order to retrieve the DTCs, the scan tool communication protocol must be compatible with the vehicle communication protocol.

The continuous memory self-test is a functional test of the PCM carried out under any condition (engine running or off) with the ignition on. Unlike the KOEO and KOER self-tests, which can only be activated on demand, the continuous self-test is always active. A concern does not need to be present when accessing continuous memory self-test DTCs, making the test valuable when diagnosing intermittent concerns. The vehicle may need to be driven or the on board diagnostic (OBD) drive cycle completed to allow the PCM to detect a concern. Refer to On Board Diagnostic (OBD) Drive Cycle for more information. When a concern is stored in memory, a DTC is output on the data link when requested by the scan tool. On Board Diagnostic (OBD) Drive Cycle

There are three types of continuous DTCs:
- an emission-related malfunction indicator lamp (MIL) code which illuminates the CHECK ENGINE indicator in the instrument cluster.
- a non-emission related, non-MIL code which does not illuminate the CHECK ENGINE indicator, but illuminates the powertrain malfunction indicator (wrench), HAZARD, or both indicators.
- a non-emission, non-MIL code which does not illuminate any indicators.

For emission-related MIL DTCs, the PCM stores the DTC in continuous memory when a concern is detected for the first time. At this point the DTC does not illuminate the MIL and is considered a pending code. The purpose of pending codes is to assist in repair verification by reporting a pending DTC after one drive cycle. If the same concern is detected after the next drive cycle, the emission-related MIL code illuminates the MIL and sets both a confirmed MIL DTC and a permanent DTC. The MIL remains illuminated even if the concern is intermittent. A permanent DTC is stored until three consecutive passing drive cycles have been completed after a repair and the MIL turns off, or after a request to clear DTCs has been made using the scan tool and the next monitoring cycle has completed and passed for that DTC.

Confirmed emission-related MIL DTCs and any non-emission related, non-MIL DTCs are erased approximately 40 vehicle warm-up cycles after the concern was last detected, or if the DTCs are cleared by the scan tool.

Pending emission-related MIL DTCs that never detect a concern on a second consecutive drive cycle (and never light the MIL) are not retained in memory for any number of vehicle warm-up cycles; they are immediately cleared when the next monitoring cycle has completed and passed for that DTC, or until a request to clear DTCs has been made by the scan tool.

Any scan tool that meets OBD requirements can access the continuous memory to retrieve emission-related MIL DTCs. However, not all scan tools access pending and non-emission related, non-MIL DTCs in the same way.

During most diagnostic procedures, it is required that all DTCs be retrieved and cleared. Permanent DTCs cannot be directly cleared by the scan tool. When a scan tool clears DTCs, pending and confirmed DTCs are immediately cleared. Permanent DTCs will not clear until the next monitoring cycle has completed and passed for that DTC. For additional information, refer to Description and Operation, Powertrain Control Software, Permanent Diagnostic Trouble Code (DTC).