Specifications

ON-BOARD DIAGNOSTIC (ABS/TCS)
P51
P
Diagnostic procedure
STEP INSPECTION ACTION
1 INSPECT BATTERY VOLTAGE
• Is battery terminal voltage okay?
Yes Make sure that battery terminal connection is okay.
Go to next step.
No Charge or replace battery, then go to Step 6.
2 INSPECT BATTERY GRAVITY
• Is battery specific gravity as specified?
Yes Go to next step.
No Replace battery, then go to Step 6.
3 INSPECT CHARGING SYSTEM
• Are generator and drive belt tension okay?
Yes Go to next step.
No Adjust drive belt tension as necessary.
Replace generator and/or drive belt as necessary.
4 INSPECT ABS (ABS/TCS) HU/CM POWER
SUPPLY CIRCUIT FOR OPEN CIRCUIT
• Start engine.
• Measure voltage between ABS (ABS/TCS)
HU/CM terminal Z and ground.
• Is voltage above 10 V?
Yes Go to next step.
No Go to Step 6.
5 INSPECT ABS (ABS/TCS) HU/CM GROUND
CIRCUIT FOR POOR GROUND OR OPEN
CIRCUIT
• Turn ignition key to OFF.
• Measure resistance between ground and
DSC HU/CM terminal AC.
• Is resistance within 01 ohm?
Yes Go to next step.
No If there is no continuity:
• Repair or replace harness for open circuit between ABS
(ABS/TCS) HU/CM and ground, then go to next step.
If resistance is not within 01 ohm:
• Repair or replace harness for poor ground then go to
next step.
6 VERIFY TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear DTC from memory.
(See P46 Clearing DTCs Procedures)
• Is same DTC present?
Yes Replace ABS (ABS/TCS) HU/CM, then go to next step.
No Go to next step.
7 VERIFY AFTER REPAIR PROCEDURE
• Is there any other DTC present?
Yes Go to applicable DTC inspection.
No Troubleshooting completed.