HEADLAMP — Headlamp Aiming Control — Trouble Diagnosis (Models without Daytime Light System)
EL-6015flowchartNo-DRL variant of the trouble-diagnosis sequence. Starts by checking the lighting switch instead of the DRL system. Otherwise the same chain.
Trouble diagnosis — Models without Daytime Light System
WARNING
SYMPTOM: Headlamp aiming does not operate.
1
INSPECTION START
2
CHECK LIGHTING SWITCH FUNCTION — 1) Turn lighting switch to 1st position. 2) Make sure that clearance, tail, license and instrument illumination lamps are turned on.
NG
NG → Check: Lighting system circuit; Lighting switch. If NG, replace lighting switch, repair or replace lighting system circuit.
OK
3
Ⓐ CHECK POWER SUPPLY (For headlamp aiming switch) — 1) Turn lighting switch to OFF position. 2) Disconnect headlamp aiming switch connector. 3) Turn lighting switch to 1st position. 4) Check if 12-14 volts exist between headlamp aiming switch harness connector terminal ① and ground.
NG
NG → Check: Harness connectors M148/E70; Fuse block connectors M139/E56; Harness continuity between lighting switch and headlamp aiming switch; Battery charge condition. If NG, replace battery, repair or replace harness or connectors.
NG → Check: Harness connectors M148/E70; Fuse block connectors M139/E56; Harness continuity between lighting switch and headlamp aiming switch; Battery charge condition. If NG, replace battery, repair or replace harness or connectors.
OK
4
Ⓑ CHECK GROUND CIRCUIT (For headlamp aiming switch) — 1) Turn lighting switch to OFF position. 2) Check harness continuity between headlamp aiming switch harness connector terminal ② and body ground. Continuity exists ... OK
NG
NG → Repair harness between headlamp aiming switch and body ground.
OK
5
Ⓒ CHECK POWER SUPPLY (For aiming motor units) — 1) Disconnect aiming motor units connectors. 2) Turn lighting switch to 1st position. 3) Check voltage between aiming motor units harness connector terminal ③ and ground. Voltage: Battery voltage
NG
NG → Check: Harness connectors M148/E69; Harness continuity between lighting switch and aiming motor units. If NG, repair or replace harness or connectors.
OK
6
Ⓐ → continued on EL-6016