Toyota 4Runner: Entire Combination Meter does not Operate
DESCRIPTION
This circuit is the power source circuit for the meter. This circuit provides two types of power sources; one is a constant power source mainly used as a backup power source, and the other is an IG power source mainly used for signal transmission. The constant power source is mainly used as a backup power source for the meter CPU, however, it is also used for CAN communication. If a voltage of 12 V is not applied to terminal IG+ when the ignition switch is turned to ON, the indicators will not operate.
WIRING DIAGRAM
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR |
|
(a) Disconnect the F14 meter connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
F14-20 (E1) - Body ground |
Always |
Below 1 Ω |
|
F14-13 (MGND) - Body ground |
Always |
Below 1 Ω |
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
F14-17 (IG+) - Body ground |
Ignition switch ON |
11 to 14 V |
|
F14-15 (B) - Body ground |
Always |
11 to 14 V |
|
*a |
Front view of wire harness connector (to Combination Meter Assembly) |
| OK | .gif) |
REPLACE COMBINATION METER ASSEMBLY |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Lost Communication with ECM / PCM "A" (U0100,U0129,U0131,U0151)
DESCRIPTION
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DTC Code.
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Terminals Of Ecu
TERMINALS OF ECU
1. CHECK ENGINE SWITCH
(a) Disconnect the F71 switch connector.
(b) Measure the resistance according to the value(s) in the table below.
Terminal No. (Symbol)
Wiring Color
Terminal Description
...
0.0068