DTC B1627 [DYNAMIC STABILITY CONTROL]

id040220874800

Caution
• When attaching the tester lead to the DSC HU/CM connector the SST (49 G066 004) must be used.

DTC

B1627

Reverse signal

DETECTION CONDITION

• Reverse signal is input for 10 s or more while driving at a vehicle speed of 65 km/h {40.3 mph}

POSSIBLE CAUSE

• Short to power circuit in harness between DSC HU/CM terminal Z and back-up light switch (MTX)
• Malfunction of TR switch (ATX) or back-up light switch (MTX)

Diagnostic procedure

STEP

INSPECTION

ACTION

1
CHECK TR SWITCH FOR DTCs (ATX)
• Turn ignition key to OFF.
• Connect WDS or equivalent to DLC-2.
• Turn ignition key to ON (engine OFF).
• Is DTC for TR switch obtained?
Yes
Follow inspection procedures for TR switch.
No
Go to step 4.
2
INSPECT BACK-UP LIGHT SWITCH (MTX)
• Inspect back-up light switch.
• Is it okay?
Yes
Go to next step.
No
Replace back-up light switch, then go to next step.
3
INSPECT REVERSE SIGNAL CIRCUIT FOR SHORT TO POWER (MTX)
• Shift select lever to neutral position.
• Turn ignition key to ON.
• Measure voltage between DSC HU/CM terminal Z and ground.
• Is voltage above 10 V?
Yes
Go to next step.
No
Replace back-up light switch, then go to next step.
Replace reverse signal circuit, then go to next step.
4
VERIFY TROUBLESHOOTING COMPLETED
• Clear DTC from memory.
• Is same DTC present?
Yes
Replace DSC HU/CM, then go to next step.
No
Go to next step.
5
VERIFY AFTER REPAIR PROCEDURE
• Is there any other DTC present?
Yes
Go to applicable DTC inspection.
No
Troubleshooting completed.