| Last Modified: 11-29-2007 | 1.6 J | |
| Service Category: Vehicle Interior | Section: Meter/Gauge/Display | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000002ZMC006X |
| Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM: DESCRIPTION (2008 Sequoia) | ||
|
Meter Illumination does not Dim at Night |
DESCRIPTION
If the dimmer switch is turned to TAIL, HEAD or AUTO, the main body ECU sends a TAIL relay signal, panel light illumination signal, panel relay signal, and TAIL cancel OFF signal*1 to the combination meter via CAN communication. Then the meter and accessory meter become dim.
*1: w/ TAIL cancel switch
HINT:
TAIL cancel switch: When the headlights are illuminated and the TAIL cancel switch is turned on, the meter and accessory meter do not dim.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
CHECK DTC |
(a) Use the Techstream to check if the CAN communication system is functioning normally
.
Result
|
Result |
Proceed to |
|---|---|
|
CAN communication system DTC is not output |
A |
|
CAN communication system DTC is output |
B |
|
|
2. |
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.
|
|
3. |
INSPECT LIGHT CONTROL RHEOSTAT |
(a) Remove the light control rheostat
.
(b) Measure the resistance according to the value(s) in 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 |
|
|
4. |
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 |
|
|
|