DTC P0942:46/P0942:49 [DYNAMIC STABILITY CONTROL (DSC)]

id0402b2893600

DTC

P0942:46, P0942:49

DSC unit mismatched installation

DETECTION CONDITION

•  No match between DSC CM ID and DSC HU ID detected

FAIL-SAFE FUNCTION

•  P0942:46

―  Illuminates the TCS/DSC indicator light, Mazda Radar Cruise Control (MRCC) warning light^*1, and Smart Brake Support/Smart City Brake Support (SBS/SCBS) indicator light (amber)^*1.

―  Tire pressure monitoring system warning light^*1 illuminates after flashes.

―  Inhibits the TCS, DSC, brake assist control, vehicle roll prevention function^*1, Hill Launch Assist (HLA), TPMS^*1, Secondary Collision Reduction (SCR)^*1, Mazda Radar Cruise Control (MRCC)^*1, Smart Brake Support (SBS)^*1, and Smart City Brake Support (SCBS)^*1controls.

•  P0942:49

―  Illuminates the ABS warning light^*2, brake system warning light^*2, TCS/DSC indicator light, Mazda Radar Cruise Control (MRCC) warning light^*1, and Smart Brake Support/Smart City Brake Support (SBS/SCBS) indicator light (amber)^*1.

―  Tire pressure monitoring system warning light^*1 illuminates after flashes.

―  Inhibits the ABS^*3, EBD^*3, TCS, DSC, brake assist control, vehicle roll prevention function^*1, Hill Launch Assist (HLA), TPMS^*1, Secondary Collision Reduction (SCR)^*1, Mazda Radar Cruise Control (MRCC)^*1, Smart Brake Support (SBS)^*1, and Smart City Brake Support (SCBS)^*1controls.

*¹: If equipped.

*²: Not illuminated depending on malfunction content.

^*3: Enabled depending on malfunction content.

POSSIBLE CAUSE

•  DSC CM ID and DSC HU ID do not match (DSC HU/CM internal malfunction)

SYSTEM WIRING DIAGRAM

Not applicable

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY NO DSC HU/CM MALFUNCTION • Clear the DTCs from the memory. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].) • Start the engine and drive the vehicle at 10km/h {6.2 mph} or more. • Are the same DTCs present?	Yes	Replace the DSC HU/CM, then go to the next step. (See DSC HU/CM REMOVAL/INSTALLATION.)
1		No	Go to the next step.
2	VERIFY THAT NO OTHER DTCS ARE PRESENT • Are any other DTCs output?	Yes	Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)].)
2		No	DTC troubleshooting completed.

DTC	P0942:46, P0942:49		DSC unit mismatched installation
DETECTION CONDITION		• No match between DSC CM ID and DSC HU ID detected
FAIL-SAFE FUNCTION		• P0942:46 ― Illuminates the TCS/DSC indicator light, Mazda Radar Cruise Control (MRCC) warning light^1, and Smart Brake Support/Smart City Brake Support (SBS/SCBS) indicator light (amber)^1. ― Tire pressure monitoring system warning light^1 illuminates after flashes. ― Inhibits the TCS, DSC, brake assist control, vehicle roll prevention function^1, Hill Launch Assist (HLA), TPMS^1, Secondary Collision Reduction (SCR)^1, Mazda Radar Cruise Control (MRCC)^1, Smart Brake Support (SBS)^1, and Smart City Brake Support (SCBS)^1controls. • P0942:49 ― Illuminates the ABS warning light^2, brake system warning light^2, TCS/DSC indicator light, Mazda Radar Cruise Control (MRCC) warning light^1, and Smart Brake Support/Smart City Brake Support (SBS/SCBS) indicator light (amber)^1. ― Tire pressure monitoring system warning light^1 illuminates after flashes. ― Inhibits the ABS^3, EBD^3, TCS, DSC, brake assist control, vehicle roll prevention function^1, Hill Launch Assist (HLA), TPMS^1, Secondary Collision Reduction (SCR)^1, Mazda Radar Cruise Control (MRCC)^1, Smart Brake Support (SBS)^1, and Smart City Brake Support (SCBS)^1controls. ¹: If equipped. ²: Not illuminated depending on malfunction content. ^*3: Enabled depending on malfunction content.
POSSIBLE CAUSE		• DSC CM ID and DSC HU ID do not match (DSC HU/CM internal malfunction)
SYSTEM WIRING DIAGRAM		Not applicable