Code  13231

Ignition signal missing

CHECK ENGINE – ”OFF”

Symptom: Engine won´t start

NOTE: this will always come first if engine is not running

Action:

Run starter for about 5 seconds. If code disappears, ignition signal is in order and fault is something else

NOTE: when you left key from the start position, CHECK ENGINE light goes ”ON” again

A              Check voltage between ECU pin 39 and ground at the same time when starter is              Running. After five seconds voltage should be 5-6 volts.

              If not, check ignition system and try to fix problem.

B              Try with new ECU.

Code 13212

Throttle potentiometer, signal too low under maximum load.

CHECK ENGINE – ”OFF”

Action:  See code 13215

Code 13213

Throttle potentiometer, signal too high at partial load.

CHECK ENGINE – ”OFF”

Symptom:  Engine won´t run correctly.

Action:  See code 13215

Code 13214

Temperature-sensor, signal faulty (temp. Lower than –44degrees or higher than +140deg)

CHECK ENGINE – ”ON”

Symptom:  High idle rpm, hard to start, won´t run correctly when warming up.

Action:

A              Check the resistance between ECU pins 7 (GL) and 25 (RD/VT)

              Should be as stated on the chart.

              If not:

              Check the wires between sensor pin 1 and ECU pin 7 (GL) and sensor pin 2

              And ECU pin 25 (RD/VT).

B               Try with new temperature sensor

C              Try with new ECU

Code 13215

Throttle potentiometer, faulty action

CHECK ENGINE – ”OFF”

Symptom:  Rich mixture under acceleration is missing, High or low idle.

Actions:

A              Check resistance between UCE pin 3 (GR) and 25 (RD/VT). Correct value is

              51 kOhm.

              If not, check the wire betw throttle pot pin 1 and ECU pin 3 (GR) and

              Between TP pin 3 and ECU pin 25 (RD/VT).

B              Try with new Throttle position potentiometer.

C              Check the voltage (ECU connector disconnected) between pin 20 (GN/RD)

              And ground.

              Voltage should be:

              Throttle  closed:                            0,08-0,56 V

              Throttle fully open :                            4,2-4,9 V

              If not, Check the wire between TP pin 2 and ECU pin 20 (GN/RD)

              Also Check the wire between ECU connector pin 27 and ground point 201

              (SV/VT)

D              Try with a new ECU

Code 13221

Air Mass Meter, signal faulty/ supply voltage missing

CHECK ENGINE – ”ON”

Symptom:  No idle, ”jerky” under acceleration

Action:

A              Ignition lock on ”DRIVE” position, check that there is battery voltage between

              AMM pin 5 (BR/VT) and ground.

              If not, check the wire between AMM pin 5 and main relay pin 87B (BR/VT)

              Check main relay and replace if necessary

B              Ignition lock on ”DRIVE” position, Check the voltage between ECU pin 35 (OR)

              And ground. Should be 0,2-0,7 Volts.

              If not, Check the wire between AMM pin 3 and ECU pin 35 (OR)

              Check the wire betw AMM pin 1 and ECU pin 25 (RD/VT)

C              Try with new AMM

D               Try with new ECU

Code 13222

Idle adjustment or AIC valve faulty

CHECK ENGINE – ”OFF”

Symptom:  Too high or low idle rpm

Action:

A              Check the intake system for the possible leaks and if necessary, check throttle

              Plate position/adjustment.

B              Check the resistance betw ECU pin 1 (GR/VT) and pin 26 (BL/RD).

              Should be 40-60 Ohm.

              Also check the resistance betw pin 28 (GL/RD) and pin 29 (BL/VT)

              Should be 40-60 Ohm

              If not, Check all the wires between AIC valve and ECU

C               Try with new AIC valve

D               Try with very darn old ECU J

NOTE: Also check the speed signal, code 13234. If signal is missing, this coudl be reason to the

Faulty idle speed.

Code 13223

Fuel / Air micture too lean

CHECK ENGINE - ”OFF”

Symptom: -

Action:

A              Check intake system for the possible leaks

              If no leaks, check the lambda sensor action as descriped on CODE 13225

NOTE: When you get problem fixed, you´ll need to take off battery voltage from the ECU to

Get it out from LIMP-HOME mode (closed lambda correction)

Code 13225

Lambda sensor, signal faulty

CHECK ENGINE – ”ON”

Symptom: -

Action :

A               Check the intake system for the possible leaks

B              Check the fuse n:o 1

C              Disconnect preheater connector.

              Start engine and check that there is battery voltage between it´s pins

              (NOTE polarity. BL/RD wire to RD wire.)

If not, check the wire betw connector and fuel pump relay pin 87B (GR/RD)

              Check the wire betw connector and ground point 201 (SV)

D              Measure the resistance between Lambda sensor 2-pin connector. Should be

              < 10 Ohm (cold sensor). After that, connect preheater connector.

              Start engine and measure voltage betw ECU pin 23 and ground.

Should vary between 0 – 1 V.

If not, check the wire betw Lambda sensor and ECU pin 23 (SV)

Also check the wire from ECU pin 4 to ground point 201.

E               Try with new Lambda sensor

F              Guess what??

Code 13233

ROM fault (ECU fault)

CHECK ENGINE – ”OFF”

Action:

Try with new ECU.

Code 13234

Speed signal missing

CHECK ENGINE – ”OFF”

Symtom:  No idle, or idle speed very low.

Action :             

A              Measure voltage betw ECU pin 6 and ground . Should vary betw 0,5 and 5 Volts,

              When other front tire is being rolled.

              If not, check the wire betw speed sensor and CU pin 6 (GR)

B              Check if ”Cruise” is still working. It uses the same speed signal.

C              Try with new meter

D              Try with new beer

Code 13235

Drive signal missing, automatic transmission only