Guard Alarm Components - Operational Problems
SECTION3
GROUP
36
NO.
916
DATE
May 1995
RE: Upgrade of Volvo Guard Alarm components
Fault tracing 940/960
M/Y 1992-94
REFERENCE: TP 31728/1, SECTION 3(39) VOLVO GUARD ANTI-THEFT ALARM; 200/700 1981-
UPGRADE OF VOLVO GUARD ALARM COMPONENTS
If a customer has operational problems with the Volvo Guard Alarm, especially with the remote transmitter, first check the week of manufacture on the alarm control module located beneath the dashboard on the left side.
If that week of manufacture is W32O or earlier, follow the procedures outlined in this Service Bulletin.
If that week of manufacture is later than W320, follow the procedures in the Service Manual: Section 3 (39), TP 31782/1, Volvo Guard Anti-Theft alarm, 200/700 1981-.
METHOD:
Preparations:
- Make a note of radio code.
- Disconnect battery ground lead.
- Remove left insulation panel.
A1
LOCATING THE CONNECTOR
940, 960 model year 1992
Locate the 4-pin connector which is on the left of the central electronics module bracket.
Model year 1993-94
Locate the 2-pin connector. Start at the alarm control module and follow the cable harness to the 2-pin connector under the dashboard.
A2
CHECKING THE STARTER INHIBITOR SWITCH MODE/YEAR 1992
Check that the pink cable from the alarm control module is connected at position 3 on the 4-pin connector.
Check that the blue-green cable from the alarm control module is spliced to the blue-green cable from the starter motor.
940 1993-94
Use an ohmmeter between one of the two blue-green cables and ground.
The blue-green cable which joins the pink cable in the connector should give a reading of (infinite resistance) between the cable and ground.
The blue-green cable which joins the blue-green cable should give a reading of 1-50 between the cable and ground.
If both values are correct, continue to A4. If the readings are not within the range, continue to A3.
960 1993-94
Use an ohmmeter between one of the two pink cables and ground.
The pink cable which joins the pink cable in the connector should give a reading of (infinite resistance) between the cable and ground.
The pink cable which joins the blue-green cable should give a reading of 1-50 between the cable and ground.
If both values are correct, continue to A4. If the readings are not within the range, continue to A3.
A3
ADJUSTING THE STARTER INHIBITOR SWITCH
If the readings obtained are outside the range and the reason for this is incorrectly connected cables in the connector, the cables must be reversed and the alarm control module replaced with a new one, after cable adjustment.
A4
CHECKING THE WEEK OF MANUFACTURE OF THE ALARM CONTROL MODULE.
Locate the alarm control module.
If the module in the vehicle is manufactured earlier than W20 1993, replace with a new one. replacement part P/N 9124542-3.
The week of manufacture is given on the label on the control module. The designation W320-X means Week 20 in 1993.
A5
CHECKING THE WEEK OF MANUFACTURE OF REMOTE CONTROL TRANSMITTERS.
The week of manufacture is given on the label located on the inside of the cover over the batteries.
If the remote control transmitter is manufactured earlier than week 20 in 1993, designation W320, then replace with remote control transmitter (P/N 3542775-6).
NOTE!
Check the week of manufacture on all of the customer's remote control transmitters.
A6
Reinstall:
- Battery ground lead
A7
PROGRAMMING TRANSMITTER CODES
If the alarm control module and/or either of the remote control transmitters are replaced, then the transmitter codes must be reprogrammed as follows:
- Activate alarm.
- Close all doors.
- Turn ignition to position II.
- Depress the function button on the status display until the status diodes and the indication diode I is lit.
- Release the functions button.
- Step forward to an unused transmitter key code position I, II or III using the function button.
A position that is in use is indicated by the diode blinking; an unused position displays a steady light.
Programming a used position will delete the old code.
After selecting one of the three places, the remote control must send a coded signal. If this does not occur within ten seconds, the alarm will return to the normal position and programming procedure of the transmitter code must be carried out again.
The alarm acknowledges an approved code by rapid blinking of the status diodes and indication diodes, followed by return to normal operating position.
A8
VERIFYING ALARM FUNCTIONS
Verify all alarm functions including both remote controls, refer to Service Manual for method.
A9
REINSTALL:
- All interior parts removed.
- Re-enter the anti-theft radio code.
- Set clock.