Pinpoint Test A: DTC P1516, P1517; GEAR CHANGE P/N DRIVING/STARTING MALFUNCTION
- CHECK THE ECM TO TCM CIRCUIT FOR HIGH RESISTANCE
Disconnect the battery negative terminal.
Disconnect the ECM electrical connector, EM80.
Disconnect the TCM electrical connector, GB02.
Measure the resistance between EM80, pin 31 (G) and GB02, pin 10 (G).
Is the resistance greater than 5 ohms?
YES: REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC. TEST the system for normal operation.
NO: Go to step 2.
- CHECK THE ECM TO TCM CIRCUIT FOR SHORT TO HIGH VOLTAGE
Reconnect the battery negative terminal.
Turn the ignition switch to the ON position.
Measure the voltage between EM80, pin 31 (G) and GROUND.
Is the voltage greater than 1 volt?
YES: REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC. TEST the system for normal operation.
NO: Go to step 3.
- CHECK THE ECM TO TCM CIRCUIT FOR SHORT TO GROUND
Measure the resistance between EM80, pin 31 (G) and ground.
Is the resistance less than 10,000 ohms?
YES: REPAIR the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTC. TEST the system for normal operation.
NO: Recheck the DTCs. Contact Dealer technical support for advice on possible ECM or TCM failure.