B1381
Symptom: TCS OFF lamp on, TCS symptom inoperative
Wheel speed RL, signal incorrect or absent
Fault symptom
TCS OFF lamp on, TCS symptom inoperative
Condition
Wheel speed signal incorrect or absent, or indicates a speed higher than 280 km/h.
Note
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See under diagnoostic trouble code B1371.
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Diagnostic procedure
1.
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If the ANTI LOCK lamp
also lights up, obtain readings of any trouble codes in the ABS system and take the necessary
remedial action, see Service Manual 5 Brakes.
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2.
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Connect the ISAT. Drive the car slowly (but at least 3 km/h) and select
WHEEL SPEED RL in the "OBTAIN READINGS" menu to check whether wheel speed is
displayed.
If it is not, connect a BOB and check whether a wheel speed signal is present
on pin 24 when the LH rear wheel is rotated at a speed of about 1/2 revolution per second.
The correct reading is about 15 Hz.
If the reading is not correct, check the cable between pin 24 of the TCS control module
and pin 22 of the ABS control module for continuity/shorting.
Remedy any defective cable.
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3.
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Clear the code diagnostic trouble code. Start the car and drive it on test
to check whether the diagnostic trouble code recurs. If it does, see "Before replacing a control
module" for further measures.
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