Mazda CX-9 Grand Touring 2009 Manual page 497

DIAGNOSTIC PROCEDURE
DTC U1901 [DSC/RSC] DIAGNOSTIC PROCEDURE
STEP
INSPECT COMBINED SENSOR SIGNAL
(CAN2 LINE) FOR OPEN CIRCUIT
Disconnect the DSC/RSC HU/CM
connectors.
Disconnect the combined sensor connectors.
Inspect for continuity between the
1
DSC/RSC HU/CM connectors (vehicle
harness-side) and the following combined
sensor connector terminals (vehicle harness-
side):
Combined sensor (CAN2_L): M-C
Combined sensor (CAN2_H): P-D
Is there continuity?
INSPECT COMBINED SENSOR SIGNAL
(CAN2 LINE) FOR SHORT CIRCUIT
2
Inspect for continuity between the following
DSC/RSC HU/CM connector terminals
2008 Mazda CX-9 Grand Touring
2008 BRAKES On-Board Diagnostic (DSC/RSC) - Mazda CX-9
INSPECTION ACTION
Yes Go to the next step.
Repair or replace the wiring harness, then
No
go to Step 4.
Repair or replace the wiring harness, then
Yes
go to Step 4.