LEMON Manuals: Even more car manuals for everyone
Home >> Mazda >> 2012 >> 6 i Touring >> Repair and Diagnosis >> External Pages >> Different car >> Section 546 (On-Board Diagnostic [Abs/TCS)) >> DTC C0040:13/C0040:64 [Abs/TCS] >> Diagnostic procedure

Diagnostic procedure

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.
STEP INSPECTION ACTION
1 VERIFY PID FOR BRAKE SWITCH MALFUNCTION 
  • Connect the M-MDS to the DLC-2
  • Access the BRAKE SW PID using the M-MDS

    (See ON-BOARD DIAGNOSIS [ABS/TCS] )

  • Is the brake switch operation normal?
 Yes Go to Step 11
No The PID value is continuously On whether the brake pedal is depressed or not.
  • Go to Step 8

The PID value is continuously Off whether the brake pedal is depressed or not
  • Go to the next step.
2 INSPECT FUSE 
  • Switch the ignition to off
  • Disconnect the negative battery cable
  • Remove the STOP 10 A fuse
  • Inspect the fuse
  • Is there any malfunction?
 Yes Replace the fuse, then go to Step 11.
No Install the fuse, then go to the next step.
3 INSPECT BRAKE SWITCH POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT 
  • Reconnect the negative battery cable.
  • Measure the voltage between brake switch terminal B (wiring harness-side) and body ground
  • Is the voltage B+  ?
 Yes Go to Step 5.
No Go to the next step.
4 INSPECT BRAKE SWITCH CONNECTOR CONDITION 
  • Disconnect the negative battery cable
  • Disconnect the brake switch connector
  • Inspect the connector and terminals (corrosion, damage, pin disconnection)
  • Is there any malfunction?
 Yes Repair or replace the connector or terminals.
Replace the brake switch, then go to Step 11
(See BRAKE PEDAL REMOVAL/INSTALLATION .)
No Repair or replace the wiring harness for a possible short to ground or open circuit.
Replace the brake switch, then go to Step 11
(See BRAKE PEDAL REMOVAL/INSTALLATION .)
5 INSPECT ABS/TCS HU/CM CONNECTOR CONDITION 
  • Disconnect the negative battery cable.
  • Disconnect the ABS/TCS HU/CM connector.
  • Inspect the connector and terminals (corrosion, damage, pin disconnection).
  • Is there any malfunction?
 Yes Repair or replace the connector or terminals, then go to Step 11.
No Go to the next step.
6 INSPECT BRAKE SWITCH SIGNAL CIRCUIT FOR OPEN CIRCUIT 
  • Inspect for continuity between brake switch terminal D (wiring harness-side) and ABS/TCS HU/CM terminal N (wiring harness-side)
  • Is there continuity?
 Yes Replace the brake switch, then go to Step 11.
(See BRAKE PEDAL REMOVAL/INSTALLATION .)
No Go to the next step.
7 INSPECT BRAKE SWITCH CONNECTOR CONDITION 
  • Disconnect the brake switch connector
  • Inspect the connector and terminals (corrosion, damage, pin disconnection)
  • Is there any malfunction?
 Yes Repair or replace the connector or terminals.
Replace the brake switch, then go to Step 11
(See BRAKE PEDAL REMOVAL/INSTALLATION .)
No Repair or replace the wiring harness for a possible open circuit.
Replace the brake switch, then go to Step 11.
(See BRAKE PEDAL REMOVAL/INSTALLATION .)
8 INSPECT ABS/TCS HU/CM CONNECTOR CONDITION 
  • Switch the ignition to off
  • Disconnect the negative battery cable
  • Disconnect the ABS/TCS HU/CM connector.
  • Inspect the connector and terminals (corrosion, damage, pin disconnection).
  • Is there any malfunction?
 Yes Repair or replace the connector or terminals, then go to Step 11.
No Go to the next step.
9 INSPECT BRAKE SWITCH CONNECTOR CONDITION 
  • Disconnect the brake switch connector
  • Inspect the connector and terminals (corrosion, damage, pin disconnection).
  • Is there any malfunction?
 Yes Repair or replace the connector or terminals
Replace the brake switch, then go to Step 11.
(See BRAKE PEDAL REMOVAL/INSTALLATION .)
No Go to the next step.
10 INSPECT BRAKE SWITCH SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY 
  • Reconnect the negative battery cable.
  • Measure the voltage between ABS/TCS HU/CM terminal N (wiring harness-side) and body ground.
  • Is the voltage B+  ?
 Yes Repair or replace the wiring harness for a possible short to power supply.
Replace the brake switch, then go to the next step.
(See BRAKE PEDAL REMOVAL/INSTALLATION .)
No Replace the brake switch, then go to the next step.
(See BRAKE PEDAL REMOVAL/INSTALLATION .)
11 VERIFY DTC TROUBLESHOOTING COMPLETED 
  • Make sure to reconnect the disconnected connectors
  • Reconnect the negative battery cable.
  • Clear the DTC from the ABS/TCS HU/CM memory using the M-MDS

    (See ON-BOARD DIAGNOSIS [ABS/TCS] .)

  • Drive the vehicle at speed of 15 km/h {9.3 mph} or more. 
  • Gradually slow down and stop the vehicle,
  • Perform the ABS/TCS DTC inspection.

    (See ON-BOARD DIAGNOSIS [ABS/TCS] .)

  • Is the same DTC present?
 Yes Repeat the inspection from Step 1.
If the malfunction recurs, replace the ABS/TCS HU/CM, then go to the next step.
(See ABS/TCS HU/CM REMOVAL/INSTALLATION .)
No Go to the next step.
12 VERIFY AFTER REPAIR PROCEDURE 
  • Are any DTCs present?
 Yes Go to the applicable DTC inspection.
(See ON-BOARD DIAGNOSIS [ABS/TCS] )
No DTC troubleshooting completed
scientia non olet · About LEMON Manuals