| Components |

|
No. |
Connector A |
Connector B |
Connector C |
|
1 |
Rear left speaker (+) |
MM CAN High |
- |
|
2 |
Front left speaker (+) |
- |
- |
|
3 |
Front right speaker (+) |
- |
- |
|
4 |
Rear right speaker (+) |
Steering wheel key |
- |
|
5 |
- |
- |
|
|
6 |
- |
- |
- |
|
7 |
- |
AUX video |
- |
|
8 |
Illumination (+) |
AUX Audio R |
- |
|
9 |
Reverse |
AUX Audio ground |
- |
|
10 |
Rear left speaker (-) |
MIC Signal (+) |
- |
|
11 |
Front left speaker (-) |
Battery (+) |
- |
|
12 |
Front right speaker (-) |
Battery (+) |
- |
|
13 |
Rear right speaker (-) |
MM CAN Low |
- |
|
14 |
- |
Auto light |
- |
|
15 |
- |
P Position |
- |
|
16 |
Door unlock status |
Speed |
- |
|
17 |
Illumination (-) |
Steering wheel key ground |
- |
|
18 |
ANT power |
ACC |
- |
|
19 |
|
AUX Video ground |
- |
|
20 |
AUX Detect |
- |
|
|
21 |
AUX Audio left |
Camera shield ground |
|
|
22 |
MIC Signal (-) |
Camera vidieo ground |
|
|
23 |
Ground |
Camera vidieo |
|
|
24 |
Ground |
Camera power |

Description and operation
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Inspection
1.
Disconnect the battery negative terminal.
2.
Remove the fuse box cover.
3.
Remove the starter relay(A).
4.
Using an ohmmeter, check that there is contin ...