Reading TAC Codes

Reading TAC module codes is similar to most flash codes. Codes are 2 digits, with tens digit displayed with long flashes (.6 second flash) and single digits are displayed with short flashes (.3 second flash). See MALFUNCTION CODE/SYMPTOM CHART table. If multiple codes are stored, they will be displayed in numerical order. If there is no malfunction or code detected, only Code 55 will be repeatedly indicated.

Fig 1: Locating TAC Module & TAC Module LED Indicator

Courtesy of NISSAN MOTOR CO., U.S.A.

MALFUNCTION CODE/SYMPTOM CHART

Code No. LED Flashes

Malfunctioning Part Or Faulty Circuit

SLIP/TCS OFF Indicator

Diagnostic Procedure

Throttle Position (TP) Sensor Circuit

On/On

Secondary TP Sensor Circuit

On/On

Secondary Throttle Valve Operating Signal Circuit

On/On

Throttle Motor Circuit (Open)

On/On

Throttle Motor Circuit (Short)

On/On

Throttle Motor Relay Circuit (Short)

On/On

Throttle Motor Relay Circuit (Open)

On/On

31⁽¹⁾

Engine Start Signal Circuit

Off/Off

Secondary Throttle Valve Return Spring Broken

On/On

33⁽¹⁾

Park/Neutral Position Switch

Off/Off

Power Supply Circuit (For Sensors)

On/On

No Malfunction Detected

Off/Off

.....

⁽¹⁾	If start signal and neutral switch circuits become inoperative, TCS will still function properly. Only when LED is flashing will indicate a malfunction area.