Revision as of 22:17, 25 August 2011

NOTE: This is only relevant for GT4’s fitted with ABS

To find out what ABS errors have been detected, you need to switch it into diagnostic mode. To do this:-

Locate the diagnostic box, under the bonnet behind the passenger suspension turret.

The lid of the box hinges open and on the back of the lid there is a pinout of the connector.

Locate the E1 and TC terminals and using a paperclip, piece of wire etc connect these two terminals together.

Go back into the car and switch the ignition to on (but do not start the car) and observe the ABS light.

It will do one of two things:-
A steady flashing indicates that there are no stored codes (as shown in the image above)
Otherwise, count the number of flashes and write down the number. There is a pause between each number, so if you count 5, then observe a pause, then count 1, that makes error code 51.

Code Diagnosis

11	Open shorted relay circuit. Check modulator wiring harness, solenoid relay, solenoid relay wiring harness and solenoid relay connector
12	Short in solenoid relay circuit. Check modulator wiring harness, solenoid relay, solenoid relay wiring harness and solenoid relay connector
13	Open pump motor relay circuit. Check modulator wiring harness, pump motor wiring harness, pump motor relay circuit and pump motor connector.
14	Short in pump motor relay circuit. Check modulator wiring harness, pump motor wiring harness, pump motor relay circuit and pump motor connector.
21	Open or short in ABS solenoid for right front wheel.
22	Open or short in ABS solenoid for left front wheel.
23	Open or short in ABS solenoid for right rear wheel.
24	Open or short in ABS solenoid for left rear wheel.
31	Problem in right front wheel speed sensor circuit
32	Problem in left front wheel speed sensor circuit.
33	Problem in right rear wheel speed sensor circuit.
34	Problem in left rear wheel speed sensor circuit.
35	Open in left front or right rear wheel speed sensor (WSS) circuit.
36	Open in right front or left rear WSS circuit
37	Faulty rear speed sensor rotor.
41	Battery voltage too low or high (under 9.5 volts or over 16.2 volts). Check battery and charging system.
51	Pump motor is locked or pump motor circuit is open. Check pump motor, motor relay, wiring harness and modulator ground connections
Always on	Malfunction of ABS module.

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 <tr><td>Always on</td><td>	Malfunction of ABS module.</td></tr>
 </table>
+[[Category:brake_system_maintenance]]