PNP Switch (A/T)

P1816 PNP Switch (A/T)

Description

The transmission range switch transmits the A/T position indicator signal (transmission range switch signal) via CAN communication to the transfer control unit. DTC P1816 will set when the transmission range 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 "DTC check".

Is DTC P1816 displayed?
YES
Perform diagnosis procedure. Refer to "Diagnosis Procedure".
NO
Inspection End.

Diagnosis Procedure

1. CHECK DTC WITH TCM

Perform "DTC check" with TCM. Refer to [SDT Function (4WD)] Scan Tool Testing and Procedures.

Is any malfunction detected by "DTC check"?
YES
Check the malfunctioning system.
NO
GO TO 2.

2. CHECK TRANSFER CONTROL UNIT

Check transfer control unit input/output signal. Refer to [Transfer Control Unit: Reference Value] 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 "DTC check".

Is DTC P1816 displayed?
YES
Perform "DTC check" with TCM again.
NO
Inspection End.