Powertrain Control Module (PCM)/Transaxle Control Module (TCM) Quick Test: QT

PCM/TCM - SYMPTOM REFERENCE CHART

Test Step		Results/Action to Take
QT1	CARRY OUT THE NETWORK TEST	Yes GO to Quick Test QT2 below No If only the PCM or the TCM has a communication concern: GO to QA: UNABLE TO ACTIVATE SELF-TEST/NETWORK COMMUNICATION ERROR/DTC P1001 . All others: Go to the TROUBLESHOOTING (CONTROL SYSTEMS) - TRIBUTE HYBRID , to diagnose the network concern.
WARNING: This vehicle is equipped with high voltage cables, components, and wiring. The high voltage warning labels containing the high voltage symbol are located on each high voltage component. High voltage cables, and wiring are orange in color. Certified rubber insulating gloves and a face shield must be worn when working with the high voltage cables, components, or wiring. The key must be cycled to the OFF position for a minimum of 5 minutes, and the high voltage traction battery service disconnect plug placed in the servicing/shipping position before disconnecting the high voltage cables. Failure to follow these instructions may result in personal injury or death. Do not disconnect, disable, or touch the high voltage cables, components, or wiring during the module reprogramming procedure because high voltage is present. The high voltage warning labels containing the high voltage symbol are located on each high voltage component. High voltage cables, and wiring are orange in color. Failure to follow these instructions may result in personal injury or death Carry out all the safety steps required to run the vehicle tests. Complete the preliminary checks looking for obvious concerns that may relate to the symptom. Check items such as those listed: fuses electrical circuits and connectors vacuum lines (leaks, routing) air intake system (leaks, restrictions) fuel quality (octane, contamination, winter/summer blend) engine cooling system (engine operating at proper temperature) motor electronics cooling system Access any related OASIS or TSB information. Carry out the network test. NOTE: If the scan tool being used does not support the network test, an alternative method is to attempt communication with each module on the controller area network (CAN) link. Does the network test pass?
QT2	CARRY OUT THE PCM AND TCM QUICK TEST	Yes If DTC P0106, P1A0C, P2195 or P2279 is retrieved and the engine runs rough or backfires, check the positive crankcase ventilation (PCV) system for damage, leaks, cracks or a disconnected PCV valve or hose. Repair as necessary. GO to DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS for direction to repair any DTCs after noting the following: REPAIR DTCs in the following order (for each mode, begin diagnosis with the first DTC output). Any PCM KOEO DTCs Any PCM KOER DTCs Any TCM KOEO DTCs Any PCM continuous memory DTCs (retrieve any available freeze frame data and disregard any identical/related continuous DTCs or DTCs already repaired). Any TCM continuous memory DTCs (retrieve any available freeze frame data and disregard any identical/related continuous DTCs or DTCs already repaired). No GO to NO DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHART INDEX for direction to the proper symptom chart in No Diagnostic Trouble Codes (DTCs) Present Symptom Charts. NOTE: If the symptom is not listed, REFER to the appropriate Service Information or GO to Z: INTERMITTENT (for intermittent PCM or TCM system diagnostics).
NOTE: If unable to access the diagnostic trouble codes (DTCs), GO to QA: UNABLE TO ACTIVATE SELF-TEST/NETWORK COMMUNICATION ERROR/DTC P1001 . For additional information on retrieving malfunction indicator lamp (MIL) and non-MIL DTCs, refer to QUICK TEST . NOTE: Do not carry out consecutive quick tests without turning the key to OFF position for a minimum of 15 seconds. Complete the PCM quick test to access any DTCs. Note any key on engine off (KOEO), key on engine running (KOER) (if engine runs) and continuous memory (MIL and non-MIL) DTCs. Complete the TCM quick test to access any DTCs. Note any KOEO and continuous memory DTCs. Are any PCM or TCM DTCs present?