P78
ON-BOARD DIAGNOSTIC (DYNAMIC STABILITY CONTROL)
Diagnostic procedure
STEP INSPECTION ACTION
1 VERIFY OTHER DTC HAS BEEN RECORDED
• If any of DTC C1186 and/or C1266 has also
been stored?
Yes Go to applicable DTC inspection.
No Go to next step.
2 INSPECT ABS FUSE CONDITION
• Is ABS fuse (60 A) okay?
Yes Go to next step.
No Replace fuse, then go to Step 6.
3 INSPECT MOTOR RELAY POWER SUPPLY
CIRCUIT FOR OPEN CIRCUIT
• Turn ignition key to OFF.
• Disconnect DSC HU/CM connector.
• Connect SST (adapter harness) to DSC HU/
CM connector (harness side only).
• Turn ignition key to ON (engine OFF).
• Measure voltage between DSC HU/CM
terminal D (harness side) of SST and
ground.
• Is voltage B+?
Yes Go to next step.
No Repair or replace harness for open circuit between battery
positive terminal and DSC HU/CM terminal D, then go to
Step 9.
4 INSPECT PUMP MOTOR GROUND CIRCUIT
FOR OPEN CIRCUIT
• Turn ignition key to OFF.
• Inspect continuity between DSC HU/CM
terminal B (harness side) of SST and
ground.
• Is there continuity?
Yes Go to next step.
No Repair or replace harness for open circuit between DSC
HU/CM terminal B and ground, then go to Step 6.
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