Climate Control Unit Inspection [Manual Air Conditioner]
WARNING: This page is about a different car, the 2024 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
- Remove the climate control unit with the connector connected. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER] .)
- Connect the negative battery terminal.
- Switch the ignition ON (engine off or on).
- Connect the negative (-) lead of the tester to body ground.
- Insert the positive (+) lead of the tester into each climate control unit terminal and measure the voltage according to the terminal voltage table.
- If there is any malfunction, inspect the parts under "Inspection item(s)".
Terminal Voltage Table (Reference)
| Terminal | Signal name | Connected to | Measurement condition | Voltage (V) | Inspection item(s) | ||
|---|---|---|---|---|---|---|---|
| 1A | B+ | F19 10 A fuse | Under any condition | B+ |
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| 1B | - | - | - | - | - | ||
| 1C | IG | F47 15 A fuse | Switch the ignition ON (engine off or on) | B+ |
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| Switch the ignition off | 1.0 or less | ||||||
| 1D | Glove compartment light | Glove compartment light control(1) | Light switch at TNS position | B+ |
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| Light switch at OFF position | 1.0 or less | ||||||
| 1E | - | - | - | - | - | ||
| 1F | - | - | - | - | - | ||
| 1G | GND | Body ground | Under any condition | Approx. 0 |
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| 1H | - | - | - | - | - | ||
| 1I | HS_CAN_H | CAN related module | Because this terminal is for communication, integrity determination by terminal voltage is not possible. |
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| 1J | HS_CAN_H | CAN related module | Because this terminal is for communication, integrity determination by terminal voltage is not possible. |
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| 1K | HS_CAN_L | CAN related module | Because this terminal is for communication, integrity determination by terminal voltage is not possible. |
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| 1L | HS_CAN_L | CAN related module | Because this terminal is for communication, integrity determination by terminal voltage is not possible. |
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| 1M | - | - | - | - | - | ||
| 1N | - | - | - | - | - | ||
| 1O | - | - | - | - | - | ||
| 1P | - | - | - | - | - | ||
| 2A | HS_CAN_H | CAN related module | Because this terminal is for communication, integrity determination by terminal voltage is not possible. |
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| 2B | - | - | - | - | - | ||
| 2C | HS_CAN_L | CAN related module | Because this terminal is for communication, integrity determination by terminal voltage is not possible. |
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| 2D | - | - | - | - | - | ||
| 2E | - | - | - | - | - | ||
| 2F | - | - | - | - | - | ||
| 2G | - | - | - | - | - | ||
| 2H | - | - | - | - | - | ||
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