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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 192 (AUTOMATIC HEADLIGHTS & LIGHTING)CIRCUIT TESTSHEADLIGHT BEAM LEVEL CONTROL ECU CIRCUIT
2004 Toyota Matrix XR, FWD, Standard

Headlight Beam Level Control Ecu Circuit

2004 Toyota Matrix XR, FWD, StandardSECTION Headlight Beam Level Control Ecu Circuit
WARNING: This page is about a different car, the 2003 Lexus RX 300 and 2002 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the connector from the ECU and inspect the connector on the wiring harness side. See CONNECTOR IDENTIFICATION . See INSPECTING HEADLIGHT BEAM LEVEL CONTROL ECU CIRCUIT (CONNECTOR DISCONNECTED)  table. If the circuit is not as specified, go to the next step.
    INSPECTING HEADLIGHT BEAM LEVEL CONTROL ECU CIRCUIT (CONNECTOR DISCONNECTED)

    Tester Connection Condition Specified Condition
    9 (RHG) - 12 (RH4) Ignition Switch OFF 26-30 Ohms
    22 (LHG) - 25 (LH4) Ignition Switch OFF 26-30 Ohms
    9 (RHG) - 13 (RH2) Ignition Switch OFF 26-30 Ohms
    22 (LHG) - 23 (LH3) Ignition Switch OFF 26-30 Ohms
    22 (LHG) - 26 (LH2) Ignition Switch OFF 26-30 Ohms
    9 (RHG) - 11 (RH1) Ignition Switch OFF 26-30 Ohms
    22 (LHG) - 24 (LH1) Ignition Switch OFF 26-30 Ohms
    9 (RHG) - 10 (RH3) Ignition Switch OFF 26-30 Ohms
    7 (HDLP) - 1 (GND) Ignition Switch ON & Light Control Switch HEAD Less Than 1.5 Volts
    18 (SHR) - 16 (SGF) Ignition Switch OFF 3.5-6.5 k Ohms
    20 (SBR) - 16 (SGF) Ignition Switch OFF 3.5-6.5 k Ohms
    1 (GND) - Body Ground Constant Continuity
  2. Connect the connector to the ECU and inspect the connector. See INSPECTING HEADLIGHT BEAM LEVEL CONTROL ECU CIRCUIT (CONNECTOR CONNECTED)  table. If the circuit is not as specified, replace the ECU.
    INSPECTING HEADLIGHT BEAM LEVEL CONTROL ECU CIRCUIT (CONNECTOR CONNECTED)

    Tester Connection Condition Specified Condition
    14 (IG) - 1 (GND) Ignition Switch ON B+ Voltage
    12 (RH4) - 9 (RHG) Ignition Switch ON, When Keep & Bounce The Vehicle *1 Pulse Generation (1)
    25 (LH4) - 22 (LHG) Ignition Switch ON, When Keep & Bounce The Vehicle *1 Pulse Generation (1)
    13 (RH2) - 9 (RHG) Ignition Switch ON, When Keep & Bounce The Vehicle *1 Pulse Generation (1)
    23 (LH3) - 22 (LHG) Ignition Switch ON, When Keep & Bounce The Vehicle *1 Pulse Generation (1)
    18 (SHR) - 16 (SGF) Ignition Switch ON Approximately 2.5 Volts
    20 (SBR) - 16 (SGF) Ignition Switch ON 5 Volts
    16 (SGF) - 1 (GND) Ignition Switch OFF Continuity
    7 (HDLP) - 1 (GND) Ignition Switch ON & Light Control Switch HEAD Below 1.5 V
    26 (LH2) - 22 (LHG) Ignition Switch ON, When Keep & Bounce The Vehicle *1 Pulse Generation (1)
    11 (RH1) - 9 (RHG) Ignition Switch ON, When Keep & Bounce The Vehicle *1 Pulse Generation (1)
    24 (LH1) - 22 (LHG) Ignition Switch ON, When Keep & Bounce The Vehicle *1 Pulse Generation (1)
    10 (RH3) - 9 (RHG) Ignition Switch ON, When Keep & Bounce The Vehicle *1 Pulse Generation (1)
    18 (WNG) - 20 (E1) Ignition Switch ON No Continuity
    6 (SPDR) - 1 (GND), 5 (SPDL) - 1 (GND) Vehicle Driving At About 18 mph (30 km) *2 Pulse Generation (1)
    1 (GND) - Body Ground Ignition Switch OFF Continuity
    (1) See Fig 1.
Fig 1: Identifying Pulse Generations
G00194770Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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