| Last Modified: 11-29-2007 | 1.6 J | |
| Service Category: Vehicle Interior | Section: Meter/Gauge/Display | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000002ZMA006X |
| Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM: DESCRIPTION (2008 Sequoia) | ||
|
Operating Light Control Rheostat does not Change Light Brightness |
DESCRIPTION
The illumination intensity of the combination meter and accessory meter is increased by turning the knob of the light control rheostat upward, and decreased by turning the knob downward.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM (LIGHT CONTROL RHEOSTAT) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream ON.
(d) Enter the following menus: Body Electrical / Combination Meter / Data List.
(e) According to the display on the Techstream, read the Data List.
Combination Meter
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
TAIL Cancel SW*1 |
TAIL cancel switch condition/ON or OFF |
ON: TAIL cancel switch ON OFF: TAIL cancel switch OFF |
- |
|
Rheostat value |
Light control rheostat switch input/Min.: 0, Max.: 100 |
Light control rheostat switch is Dark (0) → Bright (100) |
Unit: % |
*1: w/ TAIL cancel switch
OK:
Light brightness can be changed within specified range by manual operation.
|
|
2. |
INSPECT LIGHT CONTROL RHEOSTAT |
(a) Remove the light control rheostat
.
(b) Measure the resistance according to the table below.
Standard Resistance:
w/o TAIL Cancel Switch
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
3 (RV) - 1 (E) |
Downward → Upward |
See illustration |
|
7 (T) - 1 (E) |
Always |
8 to 12 kΩ |
w/ TAIL Cancel Switch
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
3 (RV) - 1 (E) |
Downward → Upward |
See illustration |
|
5 (TC) - 7 (T) |
Downward → Upward |
10 kΩ or higher → Below 1 Ω |
|
7 (T) - 1 (E) |
Always |
8 to 12 kΩ |
|
|
3. |
CHECK HARNESS AND CONNECTOR (COMBINATION METER - LIGHT CONTROL RHEOSTAT) |
|
(a) Disconnect the H37 meter connector. |
(b) Disconnect the J4 rheostat connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
w/o TAIL Cancel Switch
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
H37-1 (RHIG) - J4-7 (T) |
Always |
Below 1 Ω |
|
H37-2 (TR) - J4-3 (RV) |
Always |
Below 1 Ω |
|
H37-3 (E2) - J4-1 (E) |
Always |
Below 1 Ω |
w/ TAIL Cancel Switch
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
H37-1 (RHIG) - J4-7 (T) |
Always |
Below 1 Ω |
|
H37-2 (TR) - J4-3 (RV) |
Always |
Below 1 Ω |
|
H37-3 (E2) - J4-1 (E) |
Always |
Below 1 Ω |
|
H37-38 (TC) - J4-5 (TC) |
Always |
Below 1 Ω |
|
|
|