P0818

A750F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: P0818: Driveline Disconnect Switch Input Circuit

DTC P0818 - Driveline Disconnect Switch Input Circuit

DESCRIPTION

The ECM detects the signal from the transfer neutral position switch.
This DTC indicates that the transfer neutral position switch remains on.

MONITOR DESCRIPTION

The ECM detects whether or not the transfer gear is in the neutral position by monitoring the signal from the transfer neutral position switch.
If the ECM detects that the transfer neutral position switch is in neutral under the following conditions, the ECM will conclude that there is a malfunction of the transfer neutral position switch:

- Transfer neutral position switch indicates that the transfer is in neutral.
- Transfer shifter is in the "H" position.
- The vehicle is traveling at 25 km/h (16 mph) or more.
- The transfer neutral position switch has been on for more than thirty seconds.

If all of the above conditions are detected, the ECM will conclude that there is a malfunction of the transfer neutral position switch, illuminate the MIL and store the DTC.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (TRANSFER INDICATOR SWITCH - BODY GROUND)

(a) Disconnect the transfer indicator switch No. 2 connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
2. INSPECT TRANSFER INDICATOR SWITCH NO. 2

(a) Remove the transfer indicator switch No. 2.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:

NG -- REPAIR OR REPLACE TRANSFER INDICATOR SWITCH NO. 2 (TRANSFER NEUTRAL POSITION SWITCH)
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (TRANSFER INDICATOR SWITCH - ECM)

(a) Disconnect the ECM connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE ECM