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TABLE 2, TROUBLE CODES - Trouble Code 14 COOLANT TEMP. VOLTAGE LOW > < Explanation of Tables

Omega B

Table 1, Diagnostic Plug (XD or X13) and Voltage Supply, Check

 

TECH 1 refers to Table 1 when the unit is correctly connected but cannot receive any data.

In this case carry out the following tests:

 

       ·     Carry out TECH 1 self - test as described in TECH 1 operating instructions.

 

Important: For this check, TECH 1 must be connected to the battery with the battery connection lead.

 

Check DLC adapter used as described in the TECH 1 operating instructions

 

If data can still not be received after the self - test:

 

       ·     diagnostic plug XD or X13

       ·     engine telltale

       ·     control unit voltage supply

       ·     control unit ground connection

 

must be checked according to Table 1.

 

 

Test

Step

No.

Test Equipment Multimeter MKM-587-A

 

Test of

Terminal

Notes

Nominal Value

Possible Cause of Fault

 

 

1

Ohmmeter

Diagnostic plug

-    X13*: Ground

-    XD**: Ground

 

A / Ground

5 / Ground

Ignition Off

lower than 2 W

·   Transfer resistance at grounding point too high

 

2

Voltmeter range: 20 V DC

Diagnostic plug

-    X13*: Blink code

-    XD**: Blink code

 

B / Ground

6 / Ground

Ignition On

greater than 11.5 V

·   Astra - F:

     Lead interruption between X13 / Ter. B, X9 / Ter. 8 and control unit K69 / Ter. 13

·   Vectra / Cavalier, Calibra:

     Lead interruption between X13 / Ter. B, X11 / Ter. 4 and control unit K69 / Ter. 13

·   Omega - B:

     Lead interruption between XD / Ter. 6, X3 / Ter. 4 and control unit K69 / Ter. 13

·   Control unit K69 defective

 

 

3

Voltmeterrange: 20 V DC

Diagnostic plug

-    Xl 3*: voltage supply

-    XD**: voltage supply

F / Ground

16 / Ground

Ignition Off

greater than 11.5 V

·   Battery voltage too low

·   Astra - F, Vectra / Cavalier, Calibra:

     Lead interruption between Xl3 / Ter. F and voltage supply Ter. 30

·   Omega - B:

     Lead interruption between XD / Ter. 16 and voltage supply Ter. 30

·   Battery discharged

 

 

4

Voltmeter range: 20 V DC

Diagnostic plug

-    X13*: data lead

-    XD**: data lead

G / Ground

7 / Ground

Ignition On

greater than 9 V

·   Astra - F:

     Lead interruption between X13 / Ter. G, X9 / Ter. 7 and control unit K69 / Ter. 55

·   Vectra / Cavalier, Calibra:

     Lead interruption between X13 / Ter. G, X11 / Ter. 5 and control unit K69 / Ter. 55

·   Omega - B:

     Lead interruption between XD / Ter. 7, X3 / Ter. 3 and control unit K69 / Ter. 55

·   Control unit K6 9 defective

·   Battery discharged

 

 

*     in Astra - F, Vectra / Cavalier, Calibra

**    in Omega - B

 

5

-

Engine telltale H30

-

Ignition On 

Telltale On

·   Engine telltale H30 defective

·   Lead interruption or fuse defective between Ter. 15 and H30

·   Lead interruption or short circuit to battery voltage between H30 and control unit Ter. 35

·   Control unit K 69 defective

 

 

7 *

Ohmmeter

Control unit plug: Ground

Ter. 9 / Ground

Ter. 19 / Ground

Ter. 24 / Ground

Ter. 28 / Ground

Ter. 41 / Ground

 

Ignition Off

Disconnect plug from control unit K69

lower than 2 W

·   Transfer resistance at grounding point too high

·   Lead interruption between control unit plug and grounding point

 

8 *

Voltmeter range: 20 V DC

Control unit plug:

Voltage supply of Ter. 30 and Ter. 15

Ter. 18 / Ground

Ter. 47 / Ground

Ignition Off

Disconnect plug from control unit K69

Ignition On

greater than 11.5 V

·   Battery voltage too low

·   Lead interruption between Ter. 30 or Ter. 15 and control unit plug

·   Anti - theft warning system or immobilizer blocks voltage supply from Ter. 15 to control unit K69 / Ter. 47

 

 

* Note: After this test step, any stored trouble codes are deleted.

 

 

 

TABLE 2, TROUBLE CODES - Trouble Code 14 COOLANT TEMP. VOLTAGE LOW > < Explanation of Tables