P0818

A750F AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSMISSION SYSTEM: P0818: Driveline Disconnect Switch Input Circuit
P0818 - Driveline Disconnect Switch Input Circuit

DESCRIPTION

The ECM detects the signal indicating that the transfer is in neutral.

This DTC indicates that the signal indicating that the transfer is in neutral remains on.





MONITOR DESCRIPTION

The ECM detects whether or not the transfer shift lever is in neutral by monitoring the signal from the transfer neutral position switch.

If the ECM detects that the transfer shift lever is in neutral under all of the following conditions, the ECM will conclude that there is a malfunction of the transfer neutral position switch, illuminate the MIL and store the DTC:

- The transfer neutral position switch indicates that the transfer shift lever is in neutral.

- The transfer shift lever is in "H".

- The vehicle is traveling at 25 km/h (16 mph) or more.

- The transfer neutral position switch has been ON for more than 30 seconds.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
Perform the universal trip to clear permanent DTCs Reading and Clearing Diagnostic Trouble Codes.

PROCEDURE

1. INSPECT TRANSFER INDICATOR SWITCH (NEUTRAL POSITION)

(a) Remove the transfer indicator switch (neutral position) Removal.





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





Text in Illustration





NG -- REPLACE TRANSFER INDICATOR SWITCH (NEUTRAL POSITION) Removal
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (FOUR WHEEL DRIVE CONTROL ECU - BODY GROUND)

(a) Disconnect the F47 four wheel drive control ECU connector.





(b) Disconnect the B46 transfer indicator switch (neutral position) connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





Text in Illustration





NG -- CHECK HARNESS AND CONNECTOR (TRANSFER INDICATOR SWITCH (NEUTRAL POSITION), FOUR WHEEL DRIVE CONTROL ECU - ECM)

OK -- GO TO TRANSFER SYSTEM VF2A Transfer Case

3. CHECK HARNESS AND CONNECTOR (TRANSFER INDICATOR SWITCH (NEUTRAL POSITION), FOUR WHEEL DRIVE CONTROL ECU - ECM)

(a) Disconnect the F51 ECM connector.





(b) Disconnect the B46 transfer indicator switch (neutral position) connector.

(c) Disconnect the F47 four wheel drive control ECU connector.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE ECM Removal