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Home >> Mazda >> 2012 >> 6 i Touring >> Repair and Diagnosis >> External Pages >> Different car >> Section 602 (Automatic Transaxle [Service, Removal & Installation Aw6A-El)) >> TCM Inspection [Aw6A-El] >> Control Module Inspection

Control Module Inspection

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
  • Be careful not to damage the connector waterproofing when measuring the TCM terminal voltage. If damaged, the waterproofing efficiency could be negatively affected.
NOTE:
  • Use the ground of terminal A9 of the TCM connector (wiring harness-side) when measuring terminal voltage, as an error may occur when connecting the negative circuit tester to ground.
  1. Remove the air cleaner component. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZI-3.7] .)
  2. Measure the voltage at each TCM connector (wiring harness-side) terminal and refer to the terminal voltage table.
    • If the voltage is not as specified in the Terminal Voltage Table (Reference), inspect the parts under "Inspection item (s)"

    Terminal Voltage Table (Reference) 

    Fig 1: Identifying TCM Connector Terminals (Wiring Harness-Side)
    G04970312Courtesy of MAZDA MOTORS CORP.
    Terminal Signal Connected to Test condition Voltage (V) Inspection item (s)
    A1 Battery back up supply Battery Constant B+
    • Inspect battery
    • Inspect related harness
    A3 Manual up (Selector lever component) Up switch (Selector lever component) Shift up (M range) Below 1 0
    Other ranges, all positions B+
    A4 Manual down (Selector lever component) Down switch (Selector lever component) Shift down (M range) Below 1.0
    Other ranges, all positions B+
    A5 Starter relay No 2 control Starter relay No. 2 Shift the selector lever to P or N position Ignition switch ON B+
    • Inspect starter relay No. 2
    • Inspect related harness
    Ignition switch off Below 1.0
    A6 CAN_L Other modules Because this terminal is for serial communication, good/no good judgment by terminal voltage is not possible. Carry out inspection according to DTCs.
    A7 M range M range switch M range Below 1.0
    Other positions, all ranges B+
    A11 Battery supply Ignition switch Ignition switch ON B+
    • Inspect Ignition switch
    • Inspect related harness
    Ignition switch off Below 1 0  
    A13 Back-up light relay control Back-up light relay Ignition switch ON Shift the selector lever to R position. Below 1.0
    Other B+
    A14 CAN_H Other modules Because this terminal is for serial communication, good/no good judgment by terminal voltage is not possible. Carry out inspection according to DTCs.
  3. Remove the TCM. (See TCM REMOVAL/INSTALLATION [AW6A-EL] .)
  4. Verify that continuity or resistance at terminal is as indicated in the terminal continuity/resistance table.
    Fig 2: Identifying Coupler Component
    G06200095Courtesy of MAZDA MOTORS CORP.
    • If there is any malfunction, inspect the parts under "Inspection item (s)".
      • If the system does not work properly even though the parts or related wiring harnesses do not have any malfunction, replace the TCM. (See TCM REMOVAL/INSTALLATION [AW6A-EL] .)

    Terminal Continuity/Resistance Table (Reference) 

    Fig 3: Identifying TCM Connector Terminals & Coupler Component Terminals
    G06200121Courtesy of MAZDA MOTORS CORP.
    Terminal Signal Connected to Test Condition Continuity/
    Resistance    		 Inspection item (s)
    A9 GND GND Constant Continuity
    • Inspect related harness
    B1 Line pressure control solenoid control (-) Line pressure control solenoid
    • Inspect resistance between couple component terminals B3 and B1 (wiring harness-side)
    		 ATF temperature: 20°C {68°F} 5.0-5.6 (ohms)
    B2 Shift solenoid B control Shift solenoid B ATF temperature- 20°C {68°F} 11-15 (ohms)
    B3 Line pressure control solenoid control (+) Line pressure control solenoid
    • Inspect resistance between couple component terminals B3 and B1 (wiring harness-side).
    		 ATF temperature: 20°C {68°F} 5.0-5.6 (ohms)
    B4 TCC control solenoid control (-) TCC control solenoid
    • Inspect resistance between couple component terminals B9 and B4 (wiring harness-side)
    		 ATF temperature 20°C {68°F} 5.0-5.6 (ohms)
    B5 Shift solenoid A control Shift solenoid A ATF temperature. 20°C {68°F} 11-15 (ohms)
    B7 TFT sensor (-) TFT sensor
    • Inspect resistance between couple component terminals B7 and B8 (wiring harness-side)
    		 ATF temperature 10°C {50°F} 5 62-7.31 (kilohms)
    ATF temperature: 25°C {77°F} Approx 3.5 (kilohms)
    B8 TFT sensor (+) ATF temperature: 110°C {230°F} 0 22-0.27 (kilohms)
    B9 TCC control solenoid control (+) TCC control solenoid
    • Inspect resistance between couple component terminals B9 and B4 (wiring harness-side)
    		 ATF temperature: 20°C {68°F} 5 0-5 6 (ohms)
    B10 Shift solenoid C control (-) Shift solenoid C
    • Inspect resistance between couple component terminals B11 and B10 (wiring harness-side).
    		 ATF temperature. 20°C {68°F} 5.0-5 6 (ohms)
    B11 Shift solenoid C control (+)
    B12 Input/turbine speed sensor (+) Input/turbine speed sensor
    • Inspect for continuity between couple component terminals B12 and B13 (wiring harness-side)
    		 Continuity
    B13 Input/turbine speed sensor (-)
    B14 Shift solenoid E control (+) Shift solenoid E
    • Inspect resistance between couple component terminals B14 and B22 (wiring harness-side).
    		 ATF temperature 20°C {68°F} 5 0-5 6 (ohms)
    B16 Shift solenoid F control (-) Shift solenoid F
    • Inspect resistance between couple component terminals B21 and B16 (wiring harness-side)
    		 ATF temperature-20°C {68°F} 5.0-5 6 (ohms)
    B17 Shift solenoid D control (+) Shift solenoid D
    • Inspect resistance between couple component terminals B17 and B18 (wiring harness-side)
    		 ATF temperature. 20°C {68°F} 5 0-5.6 (ohms)
    B18 Shift solenoid D control (-)
    B19 Vehicle speed (+) VSS
    • Inspect for continuity between couple component terminals B19 and B20 (wiring harness-side)
    		 Continuity
    B20 Vehicle speed (-) VSS
    B21 Shift solenoid F control (+) Shift solenoid F
    • Inspect resistance between couple component terminals B21 and B16 (wiring harness-side)
    		 ATF temperature 20°C {68°F} 5 0-5 6 (ohms)
    B22 Shift solenoid E control (-) Shift solenoid E
    • Inspect resistance between couple component terminals B14 and B22 (wiring harness-side)
    		 ATF temperature. 20°C {68°F} 5 0-5.6 (ohms)
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