PNP Switch (A/T)

P1816 PNP SWITCH (A/T)





Description
The A/T PNP switch transmits the A/T position indicator signal (PNP switch signal) via CAN communication to the transfer control unit. DTC P1816 will set when the A/T PNP switch signal is malfunctioning or there is a communication error.




DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE
1.DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Perform self-diagnosis.
Is DTC P1816 displayed?
YES - Perform diagnosis procedure. Refer to "Diagnosis Procedure".
NO - Inspection End.




Diagnosis Procedure
1.CHECK DTC WITH TCM
Perform self-diagnosis with TCM. Refer to CONSULT-III Function (Transmission).
Is any malfunction detected by self-diagnosis?
YES - Check the malfunctioning system.
NO - GO TO 2.
2.CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to Pinout Values and Diagnostic Parameters.
Is the inspection result normal?
YES - GO TO 3.
NO - Check transfer control unit pin terminals for damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.
3.CHECK DTC
Drive the vehicle and then perform self-diagnosis.
Is DTC P1816 displayed?
YES - Perform self-diagnosis with TCM again.
NO - Inspection End.