1. Remove the service hole cover on the front side trim. (See LF CONTROL UNIT REMOVAL/INSTALLATION.)
2. Verify that the voltages of each of the terminals are as indicated in the terminal voltage table (reference).
If the voltage is not as specified in the terminal voltage table (reference), inspect the parts under Inspection item(s).
If the system does not work normally even though the inspection items are normal, replace the LF control unit.
| Terminal | Signal name | Connected to | Measurement conditions | Voltage (V) | Inspection item (s) |
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| A | Power supply | ROOM 15 A fuse | Under any condition | B+ |
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| E | Request switch signal (Driver's side) | Request switch (RF) | When driver's side request switch is pressed | 1.0 or less |
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| When driver's side request switch is not pressed | 5.0 |
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| G | Request switch signal (Passenger's side) | Request switch (LF) | When passenger's side request switch is pressed | 1.0 or less |
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| When passenger's side request switch is not pressed | 5.0 |
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| K | Start stop unit signal | Start stop unit | Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible. |
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| L | Keyless beeper power supply | Keyless beeper | When lock button on remote transmitter is pressed | Wave pattern (See Pattern 1.) |
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| Except above | 1.0 or less |
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| M | Start stop unit signal | Start stop unit | Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible. |
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| N | GROUND | Keyless beeper | Under any condition | 1.0 or less |
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| O | Keyless antenna (interior, front) | Keyless antenna (interior, front) | Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible. |
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| Q | Keyless antenna (interior, front) | Keyless antenna (interior, front) | Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible. |
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| S | Keyless antenna (exterior, LF) | Keyless antenna (exterior, LF) | Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible. |
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| U | Keyless antenna (exterior, LF) | Keyless antenna (exterior, LF) | Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible. |
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| W | Keyless antenna (exterior, RF) | Keyless antenna (exterior, RF) | Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible. |
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| X | Keyless antenna (interior, rear) | Keyless antenna (interior, rear) | Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible. |
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| Y | Keyless antenna (exterior, RF) | Keyless antenna (exterior, RF) | Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible. |
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| Z | Keyless antenna (interior, rear) | Keyless antenna (interior, rear) | Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible. |
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| AA | Keyless antenna (exterior, rear) | Keyless antenna (exterior, rear) | Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible. |
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| AB | Keyless antenna (exterior, rear) | Keyless antenna (exterior, rear) | Because this terminal is for communication, integrity determination using terminal voltage inspection is not possible. |
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LF control unit: L (+) ↔ body ground (-)
Oscilloscope setting: 2 V/DIV (Y), 100 ms/DIV (X), DC range