1.CHECK INDICATOR OUTPUT.
1) Turn the ignition switch to ON.
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Does the warning indicator illuminate for 3 seconds?
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2.CHECK INDICATOR OUTPUT.
1) Leave the ignition switch to ON for 10 seconds.
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Does the warning indicator light go off?
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3.CHECK OUTPUT VOLTAGE BETWEEN HEADLIGHT BEAM LEVELING ECM AND VEHICLE HEIGHT SENSOR.
1) Disconnect the connector from the vehicle height sensor. (front, rear)
2) Turn the ignition switch to ON.
3) Measure the voltage between the vehicle height sensor and chassis ground.
Connector & terminal
•Front vehicle height sensor:
(F8) No. 3 (+) — Chassis ground (−):
•Rear vehicle height sensor:
(R29) No. 3 (+) — Chassis ground (−):
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Is the voltage 5 V±0.25 V?
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4.CHECK HARNESS BETWEEN HEADLIGHT BEAM LEVELING ECM AND VEHICLE HEIGHT SENSOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM.
3) Measure the continuity between the headlight beam leveling ECM and the vehicle height sensor.
Connector & terminal
•Front vehicle height sensor:
(B150) No. 22 — (F8) No. 1:
(B150) No. 20 — (F8) No. 2:
(B150) No. 13 — (F8) No. 3:
•Rear vehicle height sensor:
(B150) No. 21 — (R29) No. 1:
(B150) No. 19 — (R29) No. 2:
(B150) No. 12 — (R29) No. 3:
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Replace the headlight beam leveling ECM.
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Repair the open circuit or poor contact of the connector in the harness between the headlight beam leveling ECM and vehicle height sensor.
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5.CHECK HARNESS BETWEEN BATTERY — INDICATOR BULB — ECM.
1) Disconnect the connector of ECM.
2) Turn the ignition switch to ON.
3) Measure the voltage between the indicator bulb and chassis ground.
Connector & terminal
(B150) No. 6 (+) — Chassis ground (−):
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Replace the headlight beam leveling ECM.
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6.CHECK INDICATOR BULB.
Check for open circuit or poor contact of the indicator bulb.
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Are there open circuits or poor contact?
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Replace the indicator bulb.
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7.CHECK HARNESS BETWEEN HEADLIGHT BEAM LEVELING ECM AND INDICATOR BULB.
1) Turn the ignition switch to OFF.
2) Disconnect the connector of ECM.
3) Disconnect the combination meter connector.
4) Measure the continuity between the headlight beam leveling ECM and the combination meter.
Connector & terminal
(B150) No. 6 — (i10) No. 7:
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Replace the headlight beam leveling ECM.
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Repair the open circuit or poor contact of the connector in the harness between the headlight beam leveling ECM and indicator.
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8.CHECK VEHICLE HEIGHT SENSOR OUTPUT SIGNAL.
1) Connect three dry cell batteries (1.5 V) in series.
2) Connect the (+) side of the battery to the No. 3 terminal of the sensor body, and the (−) side of the battery to terminal No. 1, to apply a voltage of 4.5 V between terminals No. 3 — No. 1.
3) With voltage applied, use a tester to measure the voltage between the No. 2 — No. 1 terminals when the sensor body link is moved slowly up and down.
Connector & terminal
Sensor body No. 2 (+) — No. 1 (−):
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Is the voltage 0.5 — 4.1 V?
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Replace the vehicle height sensor.
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9.CHECK HARNESS BETWEEN HEADLIGHT BEAM LEVELING ECM AND VEHICLE HEIGHT SENSOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM.
3) Measure the continuity between the headlight beam leveling ECM and the vehicle height sensor.
Connector & terminal
•Front vehicle height sensor:
(B150) No. 22 — (F8) No. 1:
(B150) No. 20 — (F8) No. 2:
(B150) No. 13 — (F8) No. 3:
•Rear vehicle height sensor:
(B150) No. 21 — (R29) No. 1:
(B150) No. 19 — (R29) No. 2:
(B150) No. 12 — (R29) No. 3:
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Replace the headlight beam leveling ECM.
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Repair the open circuit or poor contact of the connector in the harness between the headlight beam leveling ECM and vehicle height sensor.
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10.CHECK HEADLIGHT ON SIGNAL.
1) Disconnect the connector of the headlight beam leveling ECM.
2) Turn the ignition switch to ON.
3) Turn the headlight switch to ON.
4) Measure the voltage between the headlight relay and chassis ground.
Connector & terminal
(B150) No. 3 (+) — Chassis ground (−):
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Repair the open circuit or poor contact of the connector in the harness between the headlight relay and headlight beam leveling ECM.
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11.HEADLIGHT ASSEMBLY (LEVELING ACTUATOR) DRIVE INSPECTION.
1) Set the vehicle in a parked state.
2) Turn the ignition switch to ON, and within 10 seconds, repeat OFF ⇒ ON of headlight switch 5 times.
3) Check that the headlight beam drops once, then returns to normal.
4) Then, after waiting for 30 seconds or more with the ignition ON, turn the ignition switch to OFF.
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Does the headlight beam drop down once, and then return ?
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Replace the headlight beam leveling ECM.
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12.CHECK OUTPUT VOLTAGE BETWEEN HEADLIGHT BEAM LEVELING ECM AND HEADLIGHT ASSEMBLY (LEVELING ACTUATOR).
1) Disconnect the connector of the headlight assembly (leveling actuator).
2) Turn the ignition switch to ON.
3) Measure the voltage between the leveling actuator and chassis ground.
Connector & terminal
(B150) No. 10 (+) — Chassis ground (−):
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Replace the headlight assembly.
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13.CHECK HARNESS BETWEEN HEADLIGHT BEAM LEVELING ECM AND HEADLIGHT ASSEMBLY (LEVELING ACTUATOR).
Measure the continuity between the headlight beam leveling ECM and the headlight assembly (leveling actuator).
Connector & terminal
•Headlight beam leveler RH:
(B150) No. 10 — (F59) No. 3:
(B150) No. 17 — (F59) No. 2:
(B150) No. 23 — (F59) No. 1:
•Headlight beam leveler LH:
(B150) No. 10 — (F58) No. 3:
(B150) No. 17 — (F58) No. 2:
(B150) No. 23 — (F58) No. 1:
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Replace the headlight beam leveling ECM.
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Repair the open circuit or poor contact of the connector in the harness between the headlight assembly and headlight beam leveling ECM.
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