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Home >> Toyota >> 2004 >> Tundra Base, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 471 (Brakes - Abs With EBD & BA & TRAC & VSC (Diagnostics)) >> Abs With EBD & BA & TRAC & VSC System >> Circuit Inspection >> DTC C1242/42: Open Circuit in IG2 Circuit >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2006 Toyota Tundra and 2005 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: When replacing the master cylinder solenoid, perform zero point CALIBRATION  .
  1. Check battery voltage. 

    CHECK: 

    Check battery voltage.

    OK: 

    Voltage: 11 to 14V 

    1. NG: Check and repair  CHARGING SYSTEM  : 1GR-FE or  CHARGING SYSTEM  : 2UZ-FE. 
    2. OK: Go to next step. 
  2. Check IGN fuse (Access Cab., Standard Cab.)/IGN1 fuse (Double Cab.). 

    PREPARATION: 

    Remove the IGN fuse/IGN1 fuse from the driver side J/B.

    CHECK: 

    Measure the resistance of the IGN fuse/IGN1 fuse.

    OK: 

    Resistance: Below 1 Ω (Continuity) 

    Fig 1: Identifying IGN Fuse In Driver Side J/B
    G02642985Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 2: Identifying IGN1 Fuse In Driver Side J/B
    G02642986Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Check for short circuit in all the harnesses and components connected to IGN fuse/IGN1 fuse and replace fuse. 
    2. OK: Go to next step. 
  3. Measure the voltage of the master cylinder solenoid (skid control ECU IG2 terminal). 

    PREPARATION: 

    1. Disconnect the skid control ECU connector S30.
    2. Turn the ignition switch to the ON position.

    CHECK: 

    Measure the voltage between terminal IG2 and body ground.

    OK: 

    Voltage: 10 to 14V 

    Fig 3: Identifying Terminal IG2 Of Skid Control ECU Connector S30
    G02642987Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Repair or replace harness or connector (IG2 circuit). 
    2. OK: Go to next step. 
  4. Check harness and connector (GND3 terminal). 

    PREPARATION: 

    Disconnect the skid control ECU connector S30.

    CHECK: 

    Measure the resistance between terminal GND3 of the skid control ECU harness side connector and body ground.

    OK: 

    Below 1 Ω (Continuity) 

    Fig 4: Identifying Terminal GND3 Of Skid Control ECU Connector S30
    G02642988Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: Repair or replace harness or connector (GND3 circuit). 
    2. OK: Go to next step. 
  5. Reconfirm DTC (See  DTC CHECK / CLEAR   ). 

    PREPARATION: 

    Clear the DTC.

    CHECK: 

    Check if the same DTC is detected.

    RESULT: 

    DTC OUTPUT RESULT

    DTC is output A
    DTC is not output B
    1. B: END. 
    2. A: Replace master cylinder solenoid (See  DISASSEMBLY  ). 
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