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Home >> Mazda >> 2012 >> 6 i Touring >> Repair and Diagnosis >> External Pages >> Different car >> Section 585 (On-Board Diagnostic [Dynamic Stability Control)) >> DTC U3003:16/U3003:17/U3003:1C [Dynamic Stability Control (DSC)] >> 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 INSPECT FUSE 
  • Switch the ignition to off
  • Disconnect the negative battery cable
  • Remove the following fuses
    • MAIN 125 A fuse
    • ABS MOTOR 60 A fuse
    • IG KEY1 40 A fuse
    • ABS SOL 30 A fuse
    • SAS 5 A fuse
  • Inspect the fuses
  • Are there any malfunction?
 Yes Replace the malfunctioning fuse, then go to Step 8
No Install the fuses, then go to the next step.
2 INSPECT BATTERY 
 Yes Recharge or replace the battery, then go to Step 8
(See BATTERY RECHARGING [L5] .)
(See BATTERY RECHARGING [MZI-3.7] .)
(See BATTERY REMOVAL/INSTALLATION [L5] .)
(See BATTERY REMOVAL/INSTALLATION [MZI-3.7] .)
No Go to the next step.
3 INSPECT GENERATOR 
 Yes Replace the generator, then go to Step 8
(See GENERATOR REMOVAL/INSTALLATION [L5] .)
(See GENERATOR REMOVAL/INSTALLATION [MZI-3.7] .)
No Go to the next step.
4 INSPECT IGNITION SWITCH CONNECTOR CONDITION 
  • Disconnect the ignition switch 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 8
No Go to the next step.
5 INSPECT IGNITION SWITCH 
 Yes Replace the ignition switch, then go to Step 8
(See IGNITION SWITCH REMOVAL/INSTALLATION [WITHOUT ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .)
No Go to the next step.
6 INSPECT DSC HU/CM CONNECTOR CONDITION 
  • Disconnect the DSC 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 8
No Go to the next step.
7 INSPECT BATTERY POWER SUPPLY CIRCUIT FOR SHORT OR OPEN CIRCUIT 
  • Reconnect the ignition switch connector
  • Reconnect the negative battery cable
  • Switch the ignition to ON
  • Measure the voltage between following terminals and body ground
    • DSC HU/CM terminal AG (wiring harness-side)
    • DSC HU/CM terminal AH (wiring harness-side)
    • DSC HU/CM terminal AF (wiring harness-side)
  • Is the voltage B+  ?
 Yes Go to the next step.
No Repair or replace the wiring harness for a possible short to ground or open circuit, then go to the next step.
8 VERIFY DTC TROUBLESHOOTING COMPLETED 
 Yes Repeat the inspection from Step 1.
If the malfunction recurs, replace the DSC HU/CM, then go to the next step.
(See DSC HU/CM REMOVAL/INSTALLATION .)
No Go to the next step.
9 VERIFY AFTER REPAIR PROCEDURE 
  • Are any DTCs present?
 Yes Go to the applicable DTC inspection.
(See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)] .)
No DTC troubleshooting completed.


STEP INSPECTION ACTION
1 INSPECT FUSE 
  • Switch the ignition to off.
  • Disconnect the negative battery cable.
  • Remove the following fuses
    • MAIN 125 A fuse
    • ABS MOTOR 60 A fuse
    • IG KEY1 40 A fuse
    • ABS SOL 30 A fuse
    • SAS 5 A fuse
  • Inspect the fuses
  • Are there any malfunction?
 Yes Replace the malfunctioning fuse, then go to Step 8
No Install the fuses, then go to the next step.
2 INSPECT BATTERY 
 Yes Recharge or replace the battery, then go to Step 8
(See BATTERY RECHARGING [L5] .)
(See BATTERY RECHARGING [MZI-3.7] .)
(See BATTERY REMOVAL/INSTALLATION [L5] .)
(See BATTERY REMOVAL/INSTALLATION [MZI-3.7] .)
No Go to the next step.
3 INSPECT GENERATOR 
 Yes Replace the generator, then go to Step 8.
(See GENERATOR REMOVAL/INSTALLATION [L5] .)
(See GENERATOR REMOVAL/INSTALLATION [MZI-3.7] .)
No Go to the next step.
4 INSPECT RELAY BLOCK CONNECTOR CONDITION 
  • Disconnect the relay block 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 8.
No Go to the next step.
5 INSPECT RELAY BLOCK 
 Yes Replace the relay block, then go to Step 8.
(See RELAY BLOCK REMOVAL/INSTALLATION [WITH ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] .)
No Go to the next step.
6 INSPECT DSC HU/CM CONNECTOR CONDITION 
  • Disconnect the DSC 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 8.
No Go to the next step.
7 INSPECT BATTERY POWER SUPPLY CIRCUIT FOR SHORT OR OPEN CIRCUIT 
  • Reconnect the relay block connector.
  • Reconnect the negative battery cable.
  • Switch the ignition to ON.
  • Measure the voltage between following terminals and body ground:
    • DSC HU/CM terminal AG (wiring harness-side)
    • DSC HU/CM terminal AH (wiring harness-side)
    • DSC HU/CM terminal AF (wiring harness-side)
  • Is the voltage B+  ?
 Yes Go to the next step.
No Repair or replace the wiring harness for a possible short to ground or open circuit, then go to the next step.
8 VERIFY DTC TROUBLESHOOTING COMPLETED 
 Yes Repeat the inspection from Step 1.
If the malfunction recurs, replace the DSC HU/CM, then go to the next step.
(See DSC HU/CM REMOVAL/INSTALLATION .)
No Go to the next step.
9 VERIFY AFTER REPAIR PROCEDURE 
  • Are any DTCs present?
 Yes Go to the applicable DTC inspection.
(See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)] .)
No DTC troubleshooting completed.
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