2008 Hummer H3, ADS AL-CA

Needing some assistance with troubleshooting my install of an AutoStart AS2484TWS w/ADS AL-CA module into a 2008 Hummer H3. Install went well as per ADS GM4 Type 3 guide w2w, AL-CA seemingly programmed properly, lock/unlock working but having issues with the vehicle not cranking. Vehicle will r/s fine if key is in ignition (off position), and can also r/s takeover if vehicle is started with key. Have double checked all wiring, tried module programmed with both ADS and DBI firmware.....possibly vehicle not seeing proper resistance value from AL-CA? I'm a bit lost at this point, any ideas/input much appreciated....Al

Sounds like the W2W protocol is not working properly with the AS module and the iDatalink module. You have to change the protocol in the AS module to accept an ADS product. It's default to Directed bypass modules. Also, did you use the black 4 pin connector for the ADS module or did you use the red 4 pin connector ?Jeff

Velocity Custom Home Theater

Mobile Audio/Video Specialist

Morden, Manitoba CANADA

Morning Jeff...may well be my mistake, had thought that the protocol setting in options menu only applied to D2D, will try that. Also GWR, 12v, and ground are wired into black 4 pin plug as per GM4 instructions....many thanks for the quick response! Al

Al, It's definitely the immobilizer not working properly. The GM4 platform is a PITA and just make sure that the diodes are facing the right way as well as you will need to make sure the tach signal is a strong signal as well. The ADS module needs to know it's in W2W mode ( 2 flashes at initial program stage ) and the WHITE wire from the AS needs go to to the BLUE/WHITE wire at the 4 pin connector at the ADS module.Jeff

Velocity Custom Home Theater

Mobile Audio/Video Specialist

Morden, Manitoba CANADA

Thanks...working on it this afternoon. AL-CA is definitely in w2w mode and white wire on AS 12 pin connector connected to blue/white at 4 pin black ALCA plug. Will check tach signal, change AS setting in mode 4 function 4 to option 1 (ADS) and report back....Al

Still no luck on this.....reflashed ALCA and reprogrammed, reset AutoStart module (programmed ADS bypass option) and discovered when setting it up again that it won't learn tach (get the 4 light flashes confirming entry into tach learning mode, but no 5 flash confirmation when running and holding brake pedal). I am tied into injector wire (non-common color) and when I measure AC voltage there it seems awful low at idle.....well below 1.0v (about 0.2) and rises to about 5v when rpm rises. Tried tach learning on both low and high threshold...no luck. Other than that, as before locks work....truck will r/s with key in ignition and am able to takeover after starting with key. Thanks for any advice....Al

Is this from a cold start, or while the engine is already warm? Have you tried an ignition coil? My ex once told me I have a perfect face for radio.

Thanks geep….this is from a cold start. Yep, took a reading from #1 cyl ignition coil also....every bit as weak! Unless I'm not using my DMM correctly (set on AC volts 20 range) black to ground, probe wire in question with red. Wondering if the "no crank" condition is a result of not seeing ACC drop out...don't know if lack of learned tach could be linked to this? Al

Al, does your DMM measure RPM ? Also, if I remember properly on the GM4 platform, make sure that you program the bypass with the door closed and count 1.....2.....3 ( giving yourself at least 1.5 seconds between each position of the cylinder while programming )Jeff

Velocity Custom Home Theater

Mobile Audio/Video Specialist

Morden, Manitoba CANADA

No, my DMM does not have the capability to measure rpm. I get what you're saying about the timing on programming the ALCA....definitely was 3 seconds on each of the 4 positions, but may have been much quicker than 1.5 in between, will try that tomorrow. Also, been programming with the door open as stated in GM4 instructions (close then re-open driver door to wake databus)…thanks for the ideas, starting to think I may have to go the relay/resistor method....Al