ABS With TCS Trouble Code Charts For Warning Light Codes

DIAGNOSIS
^ Faulty ABS sensor signal (noise, irregular signal, etc.).
^ Faulty hydraulic unit.
^ Faulty harness/connector.

TROUBLE SYMPTOM
^ ABS does not operate.
^ Traction Control System (TCS) does not operate.
^ TCS operates when should not.

INSPECTION
1. Check ABS sensor mechanical trouble.
a) Dismount brake to gain access to ABS sensor and tone wheel for inspection.
b) Check pole piece and tone wheel for accumulation of foreign particles. If necessary, remove foreign particles and clean.
c) Check tone wheel teeth for cracks for deformities. If necessary, replace tone wheel (No. of teeth: 44) with a new one.
d) Check tone wheel for looseness.
Tightening torque: 10 - 16 Nm (1 - 1.6 kg-m, 7 - 12 ft. lbs.)








e) Measure tone wheel-to-pole piece gap over entire perimeter of the wheel.





If measurements check out "Not OK", adjust the gap using spacers (Part No. 26755AA000 or equivalent). If spacers cannot correct the gap, replace worn sensor or worn tone wheel.





f) Check hub runout.
g) The following checks can be made if an oscilloscope is available.
^ Raise all four wheels of ground.
^ Turn ignition switch OFF.
^ Connect connector to ABS control module.
^ Connect the oscilloscope to the ABS control module connector in accordance with trouble code.
^ Turn ignition switch ON.





^ Rotate wheels and measure voltage at specified frequency.

NOTE: When this inspection is completed, the ABS/TCS control module sometimes stores the trouble code.

TROUBLE CODE / Connector & terminal:
22 / (P6) No. 8 & No. 16
24 / (P7) No. 1 & No. 11
26 / (P7) No. 2 & No. 12
28 / (P6) No. 7 & No. 15
Specified voltage: 0.12 - 1 Volts (When it is 10 Hz.)

2. Check ground circuit of ABS/TCS control module.
a) Turn ignition switch OFF.
b) Disconnect connector from ABS/TCS control module.





c) Measure resistance between ABS/TCS control module connector and body.
Connector & terminal I Specified resistance:
(P4) No. 6 & body / 0 ohms
(P5) No. 5 & body / 0 ohms
(P7) No. 15 & body / 0 ohms

3. Check resistance of ABS sensor.
a) Turn ignition switch OFF.
b) Disconnect connector from ABS sensor.





c) Measure resistance between ABS sensor connector terminals.
TROUBLE CODE / Connector & terminal:
22 / (B6) No. 1 & No. 2
24 / (B15) No. 1 & No. 2
26 / (P8) No. 1 & No. 2
28 / (P9) No. 1 & No. 2
Specified resistance: 0.8 - 1.2 k ohms

4. Check harness connector between ABS/TCS control module and ABS sensor.
a) Turn ignition switch OFF.
b) Connect connector to ABS sensor.
c) Disconnect connector from ABS/TCS control module.





d) Measure resistance between ABS/TCS control module connector terminals.
TROUBLE CODE / Connector & terminal:
21 / (P6) No. 8 & No. 16
23 / (P7) No. 1 & No. 11
25 / (P7) No. 2 & No. 12
27 / (P6) No. 7 & No. 15
Specified resistance: 0.8 - 1.2 k ohms

5. Check sources of signal noise.
a) Check that the mobile phone, personal radio and other wireless apparatus are correctly installed.
b) Check that the antenna and other possible noise sources are distant enough from the sensor harness.
c) Check that the sealed wires of the front harness sensor (in the engine roof) are securely grounded.
d) Check that the rear sensor harness has the correct twist pitch.
Twist pitch: 25 mm (0.98 inch) or less

6. Check hydraulic unit operation. Operate the ABS sequence control and check that the brake fluid pressure at the malfunctioning brake line increases and decreases properly.