Test Procedure
- TR1 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS)
- Ignition ON, engine OFF.
Are DTCs P05C8, P05C9, P071A or P071B present?
Yes No GO to TR2. RETURN to SYMPTOM CHARTS for further direction. - TR2 CHECK THE SWITCH
- For plug in vehicles,
- EV Mode Switch connector disconnected.
- Measure the resistance between:
(+) EV Mode Switch Connector, Component Side (-) EV Mode Switch Connector, Component Side EVM GND - Cycle the EV mode switch.
- For all others,
- ECO Mode Switch connector disconnected.
- Measure the resistance between:
(+) ECO Mode Switch Connector, Component Side (-) ECO Mode Switch Connector, Component Side EVM GND - Cycle the ECO mode switch.
Does the resistance change from greater than 10K ohms with the switch released to less than 5 ohms with the switch pressed?
Yes No GO to TR3. For plug in vehicles, INSTALL a new EV Mode switch. REFER to the Service Information, Supplemental Restraint System.
Clear the SOBDMC DTCs. REPEAT the self-test.
For all others, INSTALL a new ECO Mode switch. REFER to the Service Information, Supplemental Restraint System.
Clear the SOBDMC DTCs. REPEAT the self-test. - TR3 CHECK THE EVM CIRCUIT FOR AN OPEN
- TCM-A connector disconnected.
- For plug in vehicles,
- Measure the resistance between:
(+) EV Mode Switch Connector, Harness Side (-) TCM-A Connector, Harness Side EVM EVM - Pin 27 - For all others,
- Measure the resistance between:
(+) ECO Mode Switch Connector, Harness Side (-) TCM-A Connector, Harness Side EVM EVM - Pin 27
Is the resistance less than 5 ohms?
Yes No GO to TR4. REPAIR the open circuit. Clear the SOBDMC DTCs. REPEAT the self-test. - TR4 CHECK THE EVM CIRCUIT FOR A SHORT TO GROUND
- For plug in vehicles,
- Measure the resistance between:
(+) EV Mode Switch Connector, Harness Side (-) EVM Ground - For all others,
- Measure the resistance between:
(+) ECO Mode Switch Connector, Harness Side (-) EVM Ground
Is the resistance greater than 10K ohms?
Yes No GO to TR5. REPAIR the short circuit. Clear the SOBDMC DTCs. REPEAT the self-test. - TR5 CHECK THE EVM CIRCUIT FOR A SHORT TO VOLTAGE
- Ignition ON, engine OFF.
- For plug in vehicles,
- Measure the voltage between:
(+) EV Mode Switch Connector, Harness Side (-) EVM Ground - For all others,
- Measure the voltage between:
(+) ECO Mode Switch Connector, Harness Side (-) EVM Ground
Is any voltage present?
Yes No REPAIR the short circuit. Clear the SOBDMC DTCs. REPEAT the self-test. GO to TR6. - TR6 CHECK FOR CORRECT TCM OPERATION
- Ignition OFF.
- Disconnect all the TCM connectors.
- Visually inspect for:
- pushed out pins
- corrosion
- Connect all the TCM connectors and make sure they seat correctly.
- Ignition ON, engine OFF.
- Clear the SOBDMC DTCs.
- Carry out the SOBDMC self-test.
- Verify the concern is still present.
Is the concern still present?
Yes No INSTALL a new TCM.
REFER to the Service Information, Automatic Transmission. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) , Programming the TRID Block for a Replacement TCM.The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector, or the EV Mode switch (plug in vehicles) or the ECO Mode switch (all others) was activated for greater than 30 seconds.