HEADLAMP — Headlamp Aiming Control — Trouble Diagnosis (Cont'd) (Supplement-VI)
EL-6014flowchartResistor-ladder switch produces 3.7/6.0/8.7/11.0V steps — useful diagnostic data point. The motor units read the analog voltage and seek the position; a switch fault produces an out-of-range voltage which jams the motor at one extreme.
Trouble diagnosis — Models with Daytime Light System (Cont'd)
1
From Ⓐ (EL-6013 Step C OK)
2
Ⓓ CHECK GROUND CIRCUIT (For aiming motor units) — 1) Turn lighting switch to OFF position. 2) Check harness continuity between aiming motor units harness connector terminal ① and body ground. Continuity exists ... OK
NG
NG → Check: Harness connectors M148/E69; Harness continuity between aiming motor units and body ground. If NG, repair or replace harness or connectors.
OK
3
Ⓔ CHECK SIGNAL CIRCUIT — 1) Check harness continuity between headlamp aiming switch harness connector terminal ③ and aiming motor units harness connector terminal ②. Continuity exists ... OK
NG
NG → Check: Harness connectors M148/E69; Harness continuity between headlamp aiming switch and aiming motor units. If NG, repair or replace harness or connectors.
NG → Check: Harness connectors M148/E69; Harness continuity between headlamp aiming switch and aiming motor units. If NG, repair or replace harness or connectors.
OK
4
Ⓕ CHECK HEADLAMP AIMING SWITCH FUNCTION — 1) Reconnect headlamp aiming switch harness connector. 2) Turn lighting switch to 1st position. 3) Check voltage between aiming motor units harness connector terminal ② and ground under the following conditions: [see voltage table]
NG
NG → Replace headlamp aiming switch.
OK
5
OK → Replace aiming motor unit(s).
Step F — Voltage by aim-switch position
0
Voltage (V)Approx. 3.7
1
Voltage (V)Approx. 6.0
2
Voltage (V)Approx. 8.7
3
Voltage (V)Approx. 11.0