2: Warning Lamp Stays On When Ignition Switch Is Turned On
Inspection 2: Warning Lamp Stays On When Ignition Switch Is Turned On1. CHECK CIRCUIT
Disconnect low tire pressure warning control unit connector M143 and combination meter connector M39.
Check continuity between low tire pressure warning control unit connector M143 terminal 3 (Y) and combination meter connector M39 terminal 43 (Y).
OK or NG?
OK >> GO TO 3.
NG >> Check harness for open or short between low tire pressure warning control unit and combination meter.
2. CHECK POWER SUPPLY CIRCUIT 1
Check voltage between low tire pressure warning control unit connector M143 terminal 1 (R/G) and ground.
OK or NG?
OK >> GO TO 3.
NG >> Check low tire pressure warning control unit power supply circuit for open or short.
3. CHECK POWER SUPPLY CIRCUIT 2
1. Turn ignition switch ON.
2. Check voltage between low tire pressure warning control unit connector M143 terminal 2 (G/W), 4 (G/W) and around.
OK or NG?
OK >> GO T0 4.
NG >> Check low tire pressure warning control unit power sup ply circuit for open or short.
4. CHECK GROUND CIRCUIT
Check continuity between low tire pressure warning control unit connector M143 terminal 11(B) and ground.
OK or NG?
OK >> Replace low tire pressure warning control unit.
NG >> Repair or replace low tire pressure warning control unit ground circuit.