Before you start you'll need to have some sort of steering wheel controls if you don't already. You can make your own, buy ST/ST-X wheel controls from a wrecker or buy aftermarket d40 Steering Wheel Switch Controls off ebay etc..
Here's a product currently available (as of this post):
Note: These controls were the ones I bought myself and I had to change the wiring around as it didn't suit my model (07 RX Spain Built) So just open the clip on the plug ( a little fiddly, be gentle) and use a pin push tool or a tiny flathead to pop them out and put them in as per diagram below:
Also note: the yellow wire (terminal 19) is not in this kit as it is for the illumination type.
ASCD/Cruise Control Cancel Switch 2 pin $100~ https://www.sparesbox.com.au/part/fuelmiser-stop-light-switch-csl132 Couple of YouTube vids on how to remove-refit airbag/steering wheel:
Cruise Control Setup Guide
for Nissan Navara D40 2.5L YD25
STEP 1 - Preliminary measures, looking for ASCD Cancel Switch Harness Connector
Disconnect battery, wait a few mins. (go make a coffee or something ☕) check near Brake Pedal Switch, following its harness up to see if there is another connector unplugged and strapped to it. See below pic's
Close-up of ASCD/Cruise Control Cancel Switch Harness Connector 2 pin.
If the housing looks similar to the pics above and the connector exists, then it's all plug and play, so just purchase an ASCD/Cruise Control Cancel Switch and install.
STEP 2 - Check Steering Switch wiring situation
Check wires at Combination Switch Spiral Cable/Clock Spring Connector M32 which is located under the steering wheel. To see it properly you'll need to remove the lower drivers side panel located at your knees if seated, as well as the cover under the steering wheel (2x T25 screws).
Wire 32 is SB (sky-blue) but can look like an off green when dirty/worn. The Black wire in 31 is ground/output. STEP 3 - Install purchased ASCD/Cruise Control Cancel Switch (see pic below, it's LHD but just switch accordingly)
If the ASCD/Cruise Control Cancel Switch Harness Connector was found in Step 1, then install the switch by twisting/turning it into its socket/housing on the pedal plate, plug the connector in and go to Step 7, otherwise continue to Step 4 for manual wiring.
STEP 4 - Locating ECM and running wires from it to the drivers side door well
Pop the hood and locate ECM E20 in the engine bay area, remember to make sure the battery is disconnected. This is what ECM20 looks like. Near the washer fluid bottle.
Take backing plate off connector to access wires.
Run 3 new wires from ECM Terminals 101, 102 and 103 through the firewall into drivers side foot well (RHD). Refer to below diagram for wiring locations, it can be fiddly.
E20 Terminals 101 ( ASCD Brake Switch aka: Cruise Control Cancel Switch) 102 ( ASCD Steering Switch Input) 103 (ASCD Steering Switch Output)
STEP 5 - Connect Wiring to ASCD Cancel/Brake Switch
Connect wire 101 to your newly installed ASCD Cancel/Brake Switch (right next to the Stop Lamp/Brake Pedal Switch). Run the wire back to the Fuse Box - Junction Box (J/B) at Ignition Port.
STEP 6 - Connect Wiring to Steering Switch
If there are no wires in ports 31 & 32 on M32 Connector you will need to use the wires we ran from ECM20 in Step 4, using the ASCD Steering Switch Wiring Diagram below, connect wires 102 and 103 as shown in the pics in Step 2.
STEP 7 - Final notes, diagnostics/troubleshooting
If you had to wire in to the ASCD Steering Switch, you probably also had to wire the ASCD Cancel Switch and if that's the case some potential issues might arise with the ECU mapping for cruise control implementation or it might just work.
At this point if you haven't already done so when you installed your Steering Controls on the wheel, reinstall airbag/horn, make sure all connections are plugged in, secure and that everything is screwed in properly.
Reconnect battery terminals and test drive.
Final Notes/Diagnostic
If the cruise control switches don't work then you probably need to run wires 102 and 103 as mentioned in Step 6, or retrace through the steps again.
The key parts to this are wiring (wires 102 & 103) from ECM20 to M32 Spiral Cable Connector (ports 32 and 31), ASCD Cancel Switch installed and plugged in or wired (wire 101) to ECM20 and powered by wiring to Fuse Box - Junction Box (J/B) at IGN Port.
If these are all done correctly and assuming you have steering controls plugged in to your steering wheel properly, it should all work. If not some switches could be faulty, a main one to check would be the Neutral Position Sensor, under the middle console, beneath the gear shifter region.
If your car is a manual, you may have forgotten an ASCD Cancel Switch on the clutch pedal also (see diagram in Step 3)
Some Troubleshooting
Steering Controls - Check for voltage at ECM to Steering Switch Controls as per the workshop manual
NOTE: DO NOT use ECM ground terminals for testing, it can damage the unit, instead use chassis ground etc...
Also check for continuity of the controls themselves.
Neutral Position Sensor Check/Repair/Replace
Check ASCD Cancel Switch has proper clearance to engage/disengage from brake pedal plate, see pic in Step 1.
Check if either switches or sensors are dirty or not extending and retracting properly or smoothly.
Faulty clock spring?
Intermittent or non-functional horn
Rubbing sound when steering
Airbag warning light (persisting even after ECU reset and diagnostic sequence) https://mechanicbase.com/electric/broken-bad-clock-spring-symptoms/
Did you find this blog helpful?
- Yes
- No