Last Modified: 7-3-2017 6.8:8.0.40 Doc ID: RM000000XP2012X
Model Year Start: 2007 Model: LX470 Prod Date Range: [08/2006 -           ]
Title: A750F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: Pattern Select Switch Power Mode Circuit; 2007 MY LX470 [08/2006 -        ]

Pattern Select Switch Power Mode Circuit

DESCRIPTION

The ECM memory contains the shift programs for the NORMAL and POWER patterns, 2 position, L position and lock-up patterns. Following the programs corresponding to the signals from the pattern select switch, the park/neutral position and other various sensors, the ECM switches the solenoid valves ON and OFF, and controls the transmission gear change and the lock-up clutch operation.

WIRING DIAGRAM

HINT:

*: Pattern select switch (PWR mode switch)

When the PWR mode switch is pushed, the switch contact is made and the PWR mode is selected.

To cancel the PWR mode, push the PWR mode switch once again.

INSPECTION PROCEDURE

PROCEDURE

1.

INSPECT PATTERN SELECT SWITCH (PWR mode switch)

(a) Disconnect the E5 pattern select switch connector.

(b) Measure the resistance of the switch.

Standard resistance:

Tester Connection

Switch Condition

Specified Condition

5 - 3

Pattern select switch

(PWR)

Below 1 Ω

5 - 3

Pattern select switch

(NORM)

10 kΩ or higher
NG

REPLACE PATTERN SELECT SWITCH

OK

2.

CHECK WIRE HARNESS (PATTERN SELECT SWITCH - BODY GROUND)

(a) Disconnect the E5 pattern select switch connector.

(b) Measure the resistance of the wire harness side connector.

Standard resistance:

Tester Connection

Specified Condition

E9-31 (PWR) - Body ground

Below 1 Ω
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE