Installing an HKS Turbo Timer

Installing an HKS Turbo Timer (IV) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Vehicle: 1991 Toyota MR2 Turbo (Canadian Model) Author: Geoff Seeley Version: 1.4Date: October 13, 1998 Changes since 1.3~~~~~~~~~~~~~~~~~- added basic wiring diagram Changes since 1.2~~~~~~~~~~~~~~~~~- added section on timer operation- added to testing section Changes since 1.1~~~~~~~~~~~~~~~~~- found out the the version of the turbo timer I have is really version IV and not version III- fixed wiring harness description Changes since 1.0~~~~~~~~~~~~~~~~~- added HKS part numbers Background~~~~~~~~~~ This article will outline the installation of an HKS turbo timer III in thebottom compartment of the Compact Disc storage console (between the seats). I decided to mount the TT in the center console for these reasons: 1) to keep it hidden 2) the bottom compartment is nearly useless for anything else 3) there isn't any other place to put in on/in the dash. The only other choice for hidden mounting you have is to mount it in the glove compartment. What You'll Need~~~~~~~~~~~~~~~~ Parts: (1) HKS Turbo Timer IV - P/N 4101-RA006 \ (1) 3SG/TOY 91 wiring harness - P/N 4076EC-1000BX +---- All this came in the TT kit. (1) 3 Pin to 4 Pin extension / (1) 1 wire / User Supplied: Wire (I used 14 gauge), 9 female "bullet" connectors (crimp type) 9 male "bullet" connectors (crimp type) 1 wire tap connector Double faced tape Velcro strips Tools: Phillips screwdriver Socket wrench Multimeter or voltmeter Exacto knife or similar sharp/fine knife Electrical tape Pliers Wire cutters Time: 2-3 hours Step 1: Mounting the Turbo Timer Unit~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Remove the four screws holding the CD console to the fire wall/center divider.Two screws are in the top compartment and two are in the lower compartment. Look at the back of the console after you remove it. You will see a ~1.5cm"guide" tab that fits into a corresponding hole in the center divider.(Near the bottom of the unit) Using an Exacto knife and working from the back, cut a hole through theback using the sides of the guide to define the size of the hole. Top / /| | | <-Front / | Back -> | <--+--- Cut out this area /__| |_____| / Side View Back View This hole will be just big enough to route the wires from the TT from theinside of the console, out the back, and under the center divider cover. In order to get the wires through this small hole, it is necessary totemporarily remove the plastic shell of the connector on the end of the wireharness from the TT. This can be done by compressing the small tabs on themetal blades using a pair of small pliers (or a similar tool). MAKE NOTE ofthe wire colors and positions BEFORE you remove them, in case you didn't,here's the diagram: Top __ _| |_ ___| |___ | | | Red Grn | | +---------> Cable to TT | Blu Yel | |______________| End View The shelf in the CD console can be removed by simply pulling it forward. Imounted the unit to the bottom of the shelf using velcro strips and doublefaced tape. This may seem like an unstable mounting method, but believeme, it isn't going to move! The unit is really light and three strips ofvelcro attached to the top of it and the underside of the shelf are morethan enough to hold it. | Middle | | Compartment | +----------------+ <- Shelf | | Unit | | | |________| | | | | | | | +----------------+ Front View This completes the mounting process. Don't reinstall the console yet! Go ontothe next step. Step 2: Disassembling Dash and Center Divider~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ To install the wiring harness into the ignition harness, it is necessary toremove the lower dash panel under the steering wheel. There are four screwsholding this panel on. (Roughly one per corner). There are also three pushon/pull off type clips that hold the panel in place. Pull the panel toward theseat and slightly down toward the floor to remove it. NOTE: There may be a second metal panel underneath this outer panel which you must remove using a socket driver or wrench. My car doesn't have this panel, but other MR2 owners have reported having it. You will also want to remove the center divider cover at this point too. Onthe side of the divider, you'll find two screws per side (covered with screwcaps), in the middle of the divider and at the rear. Carefully remove thescrew covers with a small screwdriver or similar tool. Next unclip the leathershift boot cover by pulling up on it (held in place with clips only). Nowremove the shifter-area cover that the leather boot clips into by pulling upon the rear of the plate. The front of this plate has two tabs that fit underthe dash cover that covers the stereo area, so you *must* start by pulling upthe back and angle it out. Now remove the two screws holding the front of thecenter divider down. You can now remove the divider cover by pulling up on theback first. Step 3: Installing The Wires~~~~~~~~~~~~~~~~~~~~~~~~~~~~ First off, disconnect the negative terminal of the battery (or don't if youlike to live on the edge) Locate the ignition harness which should be below the ignition cylinder.Install the wiring harness by unplugging the ignition harness and plugging thetwo ends into the wiring harness. Next, locate the parking brake switch wire. On my car, this wire ran up fromthe parking brake, behind the shifter area, and disappearing into the cableguide running along the left side of the divider. This wire should have about+12 volts with the parking brake off and 0 volts with it on. Use the wiretap and the HKS supplied GRAY wire to tap into this wire. I had to remove asection of the rubber tubing covering this wire first. Connect the BLACK wire from the TT to the vehicle chassis (ground). I usedthe rear bracket holding down the two shifter cable guides. Although thisground worked for me, it may not be a suitable ground on your car. Pleasecheck it with a multimeter first. The HKS kit includes a 3 pin to 4 pin harness adapter. This adapter connectsthe ignition harness to the TT unit. As this adapter is at most 10cm longyou will need to cut this adapter and extend it to the proper length toreach from the front dash to the CD console. Cut the wires of the 3-4 adapter at the middle point. Strip about 1cm ofthe wire sheathing from each of the wires and crimp on either the male orthe female bullet connectors. I decided to use bullet connectors so thatthe wiring harness can be removed later on if needed. You could directlysolder these wires if you wanted to. Estimate the length of wire needed to reach from the front dash to therear console and cut four wires of this length. Strip the ends of thesewires and crimp on the rest of the bullet connectors. Additionally, you may want to use some electrical tape to hold all the wirestogether in one bundle. Route the new extension "bus" through the left side of the cable guide thatruns beside the ashtray and heater controls. Try to make sure that the wiresdo not stick out above the height of the cables that are already installedthere as the center console may not fit back on. I routed the wires throughthe left side of the front on the console then under the left shifter cableguide and into the middle "channel" between the two shifter guides. I pickedthe middle because if you look at the underside of the center console cover,you'll notice two "fins" that fit into the spaces to the outer side of theshifter cable guides and could pinch the wires if you run them in these outerchannels. Once you have the wires routed and in place, connect the two ends to theappropriate connectors. At this point, you may want to check your wiring for shorts using themultimeter *BEFORE* you apply the power to it. You are are not using the harness adapter from HKS, you'll have to spliceand dice the ignition wiring according to this diagram: Step 4: Testing the Turbo Timer~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ If you are satisfied with your wiring, reconnect the negative side of thebattery and test the turbo timer as per the HKS instructions. Make sure thatthe safety cut-off switch from the parking brake works. (If the timer isactivated and the parking brake is released, the engine should shut offimmediately). If the timer is activated without the parking brake engaged,the engine should shut off in about 5 seconds. Step 5: Reassemble Car~~~~~~~~~~~~~~~~~~~~~~ Reinstall the center console cover, CD console, lower front-dash panel(s), andanything else you may have taken apart.:-) Congratulations! You should now have a well hidden and nice cleaninstallation of your HKS turbo timer. Operation of Turbo Timer~~~~~~~~~~~~~~~~~~~~~~~~ If you didn't receive any english instructions on the operation of the timer,here is a brief synopsis of the functions: The timer has two basic modes of operation, TIMER mode and ADD mode. TIMER Mode ---------- ON/OFF - Turn the timer on or off. Unless the timer was manually turned off, the timer will automatically turn ON (but not activate) with the ignition each time the vehicle is driven, and the time previously selected will also be retained in memory. SELECT TIME - To select the idle time, press the UP or DOWN button to toggle to the desired time. The available selections are as follows: 0.00s - 0.30s - 1.00s - 1.30s - 2.00s - 2.30s - 3.00s - 4.00s - 5.00s - 6.00s - 7.00s - 8.00s - 9.00s - 9.59s - 9.99s RESET TIME - To reset the time to 0.00s, press the UP and DOWN buttons simultaneously for at least 1 second. ALTERNATING DISPLAY - To make the display alternate between the initial time selected and the time remaining in the countdown, press the UP and POWER buttons simultaneously for at least one second. (Be sure to press the UP button first) Press the sequence a second time to stop the alternating display. RESET TURBO TIMER - To reset all functions and modes (including the cumulative hours recorded in the ADD mode), press the ALARM and POWER buttons simultaneously. (Be sure to press the ALARM button first) ADD MODE (Engine Hour Meter) ---------------------------- ON/OFF - When the timer is in TIMER mode, press the ALARM and DOWN buttons simultaneously for at least one second. The cumulative number of hours the engine has running should appear on the display. To return to TIMER mode, press the sequence a second time. If the ignition key is turned OFF, the display will revert to the TIMER display automatically. The timer will revert back to ADD mode the next time the car is started. (ie. whichever mode the timer is in, TIMER or ADD, will be remembered and restored) FLASHING DISPLAY - The timer can be programmed to flash ON and OFF while in ADD mode to indicate that the timer is recording the number of hours of engine operations. To turn the flashing display on or off, press the UP and POWER buttons simultaneously for at least one second. (Be sure to press the UP button first) RESET TIME - To reset the cumulative hours recorded in the ADD mode, press the UP and DOWN buttons simultaneously for at least one second. RESET TURBO TIMER - To reset all functions and modes (including the cumulative hours recorded in the ADD mode), press the ALARM and POWER buttons simultaneously. (Be sure to press the ALARM button first) Geoff Seeley

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