| Last Modified: 11-27-2007 | 1.6 J | |
| Service Category: Drivetrain | Section: Automatic Transmission/Transaxle | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM000000XP201UX |
| Title: AB60F AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSMISSION SYSTEM: DESCRIPTION (2008 LX570) | ||
|
Pattern Select Switch Power Mode Circuit |
DESCRIPTION
The ECM memory contains the programs for the normal and power shift patterns and lock-up pattern.
By following the programs corresponding to the signals from the No. 1 pattern select switch assembly, the park/neutral position switch and other various sensors, the ECM switches the shift solenoid valves on and off, and controls the transmission gear change and the lock-up clutch operation.
WIRING DIAGRAM
INSPECTION PROCEDURE
When the pattern select switch (PWR) is pushed, switch contact is made and power mode is selected. To cancel power mode, push the pattern select switch (PWR) once again.
PROCEDURE
|
1. |
INSPECT NO. 1 PATTERN SELECT SWITCH ASSEMBLY (PWR) |
|
(a) Remove the No. 1 pattern select switch assembly
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
4 (P) - 3 (E) |
Pattern select switch (PWR) on |
Below 1 Ω |
|
4 (P) - 3 (E) |
Pattern select switch (PWR) off |
10 kΩ or higher |
|
|
2. |
CHECK HARNESS AND CONNECTOR (NO. 1 PATTERN SELECT SWITCH ASSEMBLY - BODY GROUND) |
|
(a) Disconnect the V5 No. 1 pattern select switch assembly connector. |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
V5-3 (E) - Body ground |
Always |
Below 1 Ω |
|
|
3. |
CHECK HARNESS AND CONNECTOR (NO. 1 PATTERN SELECT SWITCH ASSEMBLY - ECM) |
(a) Disconnect the A38 ECM connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
A38-51 (PWR) - Body ground |
Pattern select switch (PWR) on |
Below 1 Ω |
|
A38-51 (PWR) - Body ground |
Pattern select switch (PWR) off |
10 kΩ or higher |
|
|
|