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Diagnosis Procedure
1.CHECK SELF-DIAGNOSIS RESULT
With M.U.T.-III SE
  1. Ignition switch ON
  2. Select “Self Diagnostic Result” mode of “IPDM E/R” using M.U.T.-III SE.
  3. Check if DTC "B20A4–87" is displayed with DTC "B20A2–87".
Is applicable DTC detected?
.
.
 
2.CHECK HEADLIGHT LH LIN COMMUNICATION CIRCUIT 1
  1. Ignition switch OFF.
  2. Disconnect following connectors.
    • Front combination light RH
    • Front combination light LH
    • IPDM E/R
  3. Check continuity between front combination light LH harness connector and IPDM E/R harness connector.
    Front combination light LHIPDM E/RContinuity
    ConnectorTerminalConnectorTerminal
    E1092E12038Existed
  4. Check continuity between IPDM E/R harness connector and ground.
    IPDM E/R—Continuity
    ConnectorTerminal
    M12038GroundNot existed
Is the inspection result normal?
Replace IPDM E/R. Refer to Removal and Installation.
Repair or replace harness.
 
3.CHECK HEADLIGHT LH FUSE
  1. Ignition switch OFF.
  2. Check that the following fuse is not blown (open).
    UnitFuse No.Capacity
    Front combination light LHJ30 A
Is the fuse blown (open)?
Replace the blown (open) fuse after repairing the affected circuit if a fuse is blown (open).
.
 
4.CHECK HEADLIGHT LH POWER SUPPLY
  1. Disconnect front combination light LH connector
  2. Check voltage between front combination light LH harness connector and ground.
    +-Voltage
    Front combination light LH
    ConnectorTerminal
    E1091GroundBattery voltage
Is the inspection result normal?
.
Repair or replace harness.
 
5.CHECK HEADLIGHT LH GROUND CIRCUIT
Check continuity between front combination light LH harness connector and ground.
Front combination light LH—Continuity
ConnectorTerminal
E1096GroundExisted
Is the inspection result normal?
.
Repair or replace harness.
 
6.CHECK HEADLIGHT LH CONTROL SIGNAL
  1. Ignition switch ON.
  2. Check voltage between front combination light LH harness connector and ground.
    +-Voltage
    Front combination light LH
    ConnectorTerminal
    E1095Ground6 – 16 V
Is the inspection result normal?
.
.
 
7.CHECK HEADLIGHT LH CONTROL SIGNAL CIRCUIT
  1. Ignition switch OFF.
  2. Disconnect IPDM E/R connector.
  3. Check continuity between front combination light LH harness connector and IPDM E/R harness connector.
    Front combination light LHIPDM E/RContinuity
    ConnectorTerminalConnectorTerminal
    E1095E21750Existed
Is the inspection result normal?
Replace IPDM E/R. Refer to Removal and Installation.
Repair or replace harness.
 
8.CHECK HEADLIGHT LH LIN COMMUNICATION CIRCUIT 2
  1. Ignition switch OFF.
  2. Disconnect IPDM E/R connector.
  3. Check continuity between front combination light LH harness connector and IPDM E/R harness connector.
    Front combination light LHIPDM E/RContinuity
    ConnectorTerminalConnectorTerminal
    E1092E12038Existed
Is the inspection result normal?
Replace headlight LH. Refer to Removal and Installation.
Repair or replace harness.