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Autodata - Diagnostic Trouble Codes Fault locations and probable causes - 2004 edition

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VoLVo Model: 850 SNIC7O 960<br />

Troubie code identification<br />

Scanner<br />

type<br />

<strong>Fault</strong> location<br />

No fault found<br />

Transmission mode selection switch - high input<br />

Shift solenoid (SS) 1 - short to earth<br />

Shift solenoid (SS) 1 - circuit malfunction<br />

Transmission fluid pressure (TFP) solenoid - short to<br />

positive<br />

Transmission mode selection switch - low input<br />

Transmission fluid pressure (TFP) solenoid - open circuit1<br />

short to earth<br />

Transmission control module (TCM) - supply voltage to<br />

TFP solenoid defective<br />

Engine control module (ECM) - incorrect load signal<br />

Transmission fluid temperature (TFT) sensor - low input<br />

Transmission fluid temperature (TFT) sensor - high input<br />

Transmission kick-down switch - low input<br />

Engine control module (ECM), TP sensor signal - high<br />

input<br />

Shift solenoid (SS) 2 - short to earth<br />

Shift solenoid (SS) 2 - circuit malfunction<br />

Engine control module (ECM), TP sensor signal - low<br />

input<br />

Vehicle speed sensor (VSS) - no signal<br />

Transmission fluid temperature (TFT) sensor - high input<br />

ECMRCM electrical connection, torque reduction - signal<br />

low<br />

ECMRCM electrical connection, torque reduction - signal<br />

high<br />

ECMRCM electrical connection - torque reduction signal<br />

lnput shaft speed (ISS) sensor - no signal<br />

lnput shaft speed (ISS) sensor - implausible signal<br />

Transmission range (TR) switch<br />

Gear 1 - incorrect ratio<br />

Gear 2 - incorrect ratio<br />

Probable cause<br />

Switch incorrectly operated, wiring open<br />

circuitlshort to positive, transmission mode<br />

selection switch<br />

Wiring short to earth, SS<br />

Wiring, SS<br />

Wiring short to positive, TFP solenoid<br />

Wiring short to earth, transmission mode selection<br />

switch, 'W' button pressed for more than<br />

25 seconds<br />

Wiring openlshort to earth, TFP solenoid<br />

TCM<br />

Wiring, ECM, TCM<br />

Wiring short to earth, TFT sensor<br />

Wiring openlshort to positive, TFT sensor<br />

Wiring short to earth, transmission kick-down<br />

switch, TP sensor adaptationlsignal<br />

ECM trouble code@) stored, ECMITCM electrical<br />

connection short to positive, ECM/TCM earth wiring<br />

Wiring short to earth, SS<br />

Wiring, SS<br />

ECM trouble code@) stored, ECM/TCM electrical<br />

connection openlshort to earth, ECM/TCM earth<br />

wiring<br />

Wiring, speedometer, VSS<br />

ATF level incorrect, towing weight limit exceeded,<br />

wiring, TFT sensor<br />

Ignition switched on with ECM disconnected, wiring<br />

openlshort to earth, TR switch<br />

Wiring short to positive, TR switch<br />

Wiring, ECM, TCM<br />

Wiring, ISS sensor<br />

Wiring, electrical interference, ISS sensor<br />

Incorrect adjustment, wiring, TR switch<br />

Electrical interference of ISS sensorNSS signal,<br />

ISS sensorNSS signal faulty, TR switch<br />

adjustmentldefective, ATF level low, mechanical<br />

transmission fault, wiring<br />

Electrical interference of ISS sensorNSS signal,<br />

ISS sensorNSS signal faulty, TR switch<br />

adjustmentldefective, ATF level low, mechanical<br />

transmission fault, wiring

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