Mazda 6 2002 - Page 647

P90
ON-BOARD DIAGNOSTIC (DYNAMIC STABILITY CONTROL)
Diagnostic procedure
STEP INSPECTION ACTION
1 INSPECT COMBINE SENSOR POWER
SUPPLY CIRCUIT FOR OPEN CIRCUIT
• Turn ignition key to ON (engine OFF).
• Measure voltage between combine sensor
terminal C (harness side) of and ground.
• Is voltage 4.55.5 V?
Yes Go to next step.
No Repair or replace harness for open circuit between yaw rate
sensor terminal C and ignition switch, then go to Step 8.
2 INSPECT COMBINE SENSOR GROUND
CIRCUIT FOR OPEN CIRCUIT
• Turn ignition key to OFF.
• Disconnect DSC HU/CM and yaw rate
sensor connectors.
• Inspect continuity between DSC HU/CM
terminal Y (harness side) and combine
sensor terminal E (harness side).
• Is there continuity?
Yes Go to next step.
No Repair or replace harness for open circuit between DSC
HU/CM terminal Y and yaw rate sensor terminal E, then go
to Step 8.
3 INSPECT YAW RATE SENSOR PART SIGNAL
CIRCUIT FOR OPEN CIRCUIT
• Inspect continuity between DSC HU/CM
terminal T (harness side) and combine
sensor terminal D (harness side).
• Is there continuity?
Yes Go to next step.
No Repair or replace harness for open circuit between DSC
HU/CM terminal T and yaw rate sensor terminal D, then go
to Step 8.
4 INSPECT LATERAL-G SENSOR PART
SIGNAL CIRCUIT FOR OPEN CIRCUIT
• Inspect continuity between DSC HU/CM
terminal O (harness side) and combine
sensor terminal B (harness side).
• Is there continuity?
Yes Go to next step.
No Repair or replace harness for open circuit between DSC
HU/CM terminal O and combine sensor terminal B, then go
to Step 8.
5 INSPECT YAW RATE SENSOR PART SIGNAL
CIRCUIT FOR SHORT TO GROUND
• Turn ignition key to OFF.
• Inspect continuity between DSC HU/CM
terminal T (harness side) and ground.
• Is there continuity?
Yes Repair or replace harness for short to ground circuit
between DSC HU/CM terminal T and combine sensor
terminal D, then go to Step 8.
No Go to next step.
6 INSPECT LATERAL-G SENSOR PART
SIGNAL CIRCUIT FOR SHORT TO GROUND
• Turn ignition key to OFF.
• Inspect continuity between DSC HU/CM
terminal O (harness side) and ground.
• Is there continuity?
Yes Repair or replace harness for short to ground circuit
between DSC HU/CM terminal O and combine sensor
terminal B, then go to Step 8.
No Go to next step.
7 INSPECT DIAGNOSIS SIGNAL CIRCUIT FOR
SHORT FOR OPEN
• Turn ignition key to OFF.
• Inspect continuity between DSC HU/CM
terminal S (harness side) and combine
sensor terminal F.
• Is there continuity?
Yes Repair or replace harness for open circuit between DSC
HU/CM terminal S and combine sensor terminal F, then go
to Step 8.
No Go to next step.
8 INSPECT DIAGNOSIS SIGNAL CIRCUIT FOR
SHORT TO GROUND
• Turn ignition key to OFF.
• Inspect continuity between DSC HU/CM
terminal S (harness side) and combine
sensor terminal F.
• Is there continuity?
Yes Repair or replace harness for short to ground circuit
between DSC HU/CM terminal S and combine sensor
terminal F, then go to Step 8.
No Go to next step.
9 INSPECT COMBINE SENSOR
• Inspect combine sensor.
(See P43 COMBINE SENSOR
INSPECTION)
• Is it okay?
Yes Go to next step.
No Replace yaw rate sensor, then go to next step.
10 VERIFY TROUBLESHOOTING COMPLETED
• Clear DTC from memory.
(See P46 Clearing DTCs Procedures)
• Is same DTC present?
Yes Replace DSC HU/CM, then go to next step.
No Go to next step.
11 VERIFY AFTER REPAIR PROCEDURE
• Is there any other DTC present?
Yes Go to applicable DTC inspection.
No Troubleshooting completed.