Instrument Panel Circuit Board: Service and Repair
INSTRUMENT PACK FLEXIBLE PRINTED CIRCUITRENEW
Disconnect the battery.
Remove driver's side dash liner securing screws, release securing clip, and remove liner.
Release steering column clamp, fully extend steering wheel, and re-tighten clamp.
Remove instrument pack assembly securing screws. Disconnect block connectors from rear of pack.
Displace and remove instrument pack assembly.
Remove instrument pack cowl-housing screws, and remove cowl-housing.
Place pack face down on bench, ensuring cowl/lens is protected with a suitable cloth or similar.
NOTE: To minimize risk of damage and contamination, all repairs conducted on the Instrument Pack should be performed in a non-static dust-free environment,
Remove the electronics pack cover securing screws, and remove the cover.
Fig 1:
Carefully release the flexible printed circuit ribbon-ends from the edge-connectors, by squeezeing grips between thumb and forefinger while sliding out connector-latch (Fig.1).
Fig 2:
Release the electronics pack retaining clips (Fig 2) and pivot the pack upwards.
Displace and remove the electronics pack from the instrument pack by lifting off from hinges.
Fig 3:
Displace and remove all warning bulbs (bayonet fitting, twist 1/8th turn anti-clockwise to release - Fig 3).
NOTE: There are two different types of colored bulb holders, each type must be returned to the correct location.
Fig 4:
Disconnect the flexible printed circuit to LCD multi-plug (Fig 4). DO NOT remove plug from the outer case of the Instrument Pack.
Fig 5:
Remove the 7 veneer panel securing screws (Fig 5), carefully peeling back top corners of the flexible printed circuit to gain access to 2 of the veneer panel securing screws.
With the gauges uppermost, release the cowl/lens securing clips and remove the cowl/lens assembly.
CAUTION: With the cowl/lens removed, DO NOT rest the pack face down. The gauge needles are extremely delicate and are easily damaged. Also, take care not to scratch or damage the gauge faces, ensure cleanliness when handling the pack.
Fig 6:
Displace and remove the veneer panel. The LCD module is attached to the veneer panel, and with caution may be removed as a complete, assembly. CAREFULLY, remove oil/water temperature gauge set, gently easing the pins out of the printed circuit crimps (Fig 6). To prevent widening crimp connections, gauge pairs should be kept square to the Instrument Pack moulding whilst removing.
Repeat for the battery/fuel gauge set
Repeat for the speedometer/tachometer gauge set.
Displace and remove the flexible printed Circuit.
NOTE: Individual gauge movements CAN NOT be serviced, pointers and can location screws should not be removed. Gauges should not be placed face down.
Align new flexible printed circuit to instrument pack. Align and fit speedometer/tachometer gauge set to instrument pack. Take care not to damage gauge needles.
Fig 7:
Ensure gauge set is inserted square to pack and flexible printed circuit and CAREFULLY push the gauge pins through the printed circuit. DO NOT press down on the crimps, distortion may occur. Press down on the flat tangs (set at right angles to the crimps) as shown in Fig 7
NOTE: Take care not to damage crimps or flexible printed circuit. If damage occurs or problems arise due to loose crimp connections, renew the flexible printed circuit.
Repeat for the battery/fuel gauge set.
Repeat for the oil/water temperature gauge set.
Before fitting veneer panel, carefully return all gauge needles to "STOP PIN" position.
Align and fit veneer panel/LCD module assembly. Fit and tighten centre securing screw.
Fit the cowl/lens assembly.
Fit and tighten the six remaining veneer panel securing screws.
Fit and fully seat warning bulbs, ensuring correct colour type is inserted at correct location (the 8 white bulb/ holders are for gauge illumination, the remaining 24 are for warning indication only).
Connect the flexible printed circuit multi-plug to the LCD unit.
Carefully fit electronics pack over the flexible printed circuit connections and locate into hinges.
Pivot pack downwards and fit into securing clips.
Fit the flexible printed Circuit to the edge-connectors, by positioning holes in flexible printed circuit membrane over the connector-latch locating pips and sliding latch to the fully closed position
Align and fit the back cover to the electronics pack. Fit and tighten the securing screws.
Fit the cowl-housing to the pack. Fit and tighten the cowl-housing securing screws.
Fit instrument pack assembly into dashboard position, re-connect the block connectors.
Align assembly, fit and tighten the securing screws.
Return steering wheel to original position.
Refit the dash liner.
Reconnect the battery.
NOTE: On re-connection of the battery, it is important that the ignition is cycled and the bulb check is completed. The odometer reading will then be restored to the correct value.