Pattern Select Switch Circuit
A760F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: Pattern Select Switch Circuit
- Pattern Select Switch Circuit
DESCRIPTION
The ECM receives tow/haul pattern select switch information and performs tow/haul control.
While tow/haul control is operating, in contrast to normal mode, low gears are used to increase engine braking and towing power, reduce frequent shifts, and improve driveability. Tow/haul control includes throttle control, shift schedule control, wide open throttle shift timing control and AI-SHIFT control.
Tow/haul mode only operates when the shift lever is in D and the tow/haul pattern select switch is on.
HINT
* The tow/haul pattern select switch is a momentary-type switch.
* In order to cancel tow/haul mode, push the tow/haul pattern select switch again or turn the ignition switch off.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1. INSPECT TOW/HAUL PATTERN SELECT SWITCH
(a) for Column Shift Type:
(1) Disconnect the J25 transmission control switch connector.
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
(b) for Floor Shift Type:
(1) Remove the rear upper console panel sub-assembly Removal.
(2) Disconnect the J23 tow/haul pattern select switch connector.
(3) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
Result
(4) Install the rear upper console panel sub-assembly Installation.
C -- REPLACE TOW/HAUL PATTERN SELECT SWITCH ASSEMBLY
B -- REPLACE TRANSMISSION CONTROL SWITCH (COLUMN SHIFT SHIFT LEVER SUB-ASSEMBLY) Disassembly
A -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (TOW/HAUL PATTERN SELECT SWITCH - BODY GROUND)
(a) for Column Shift Type:
(1) Disconnect the J25 transmission control switch connector.
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
(b) for Floor Shift Type:
(1) Remove the rear upper console panel sub-assembly Removal.
(2) Disconnect the J23 tow/haul pattern select switch connector.
(3) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
(4) Install the rear upper console panel sub-assembly Installation.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (TOW/HAUL PATTERN SELECT SWITCH - ECM)
(a) Disconnect the A24 ECM connector.
(b) 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 -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures