Discussion Starter · #3 · Jan 28, 2011. Well, to tell you frankly I am not sure if its the BCM. OnStar diagnostics told me TCM and ECM are not communicating that is why when I shift the gear selector it does not show on the DIC. The dealer also tells me that what they found was there is a TCM switch that was bad.
If you are running into issues marrying a Power Vision (PV) to an ECM, having trouble flashing an ECM or cannot seem to read an ECM, there are several possible reasons. Be certain the PV vehicle interface is connected correctly and completely to the Diagnostic Port of the bike. These are the same gray color as the plug of the Vehicle Interface.
Full Forum Listing Nov 18, 2010 · This reset literally takes seconds, as the ECM has very little capacitance to keep the processor alive when power is removed. Refer to the Toyota / Scion Vehicle Support chart located on TIS, under Diagnostics - Immobilizer Reset With ECU connectors in place, back-probe and short terminals TC to E1 (pin 17 to.
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DTC P1689: NO COMMUNICATION BETWEEN ECM & INJECTION PUMP MODULE (OBDII) Monitor & Set Conditions Communication between Engine Control Module (ECM) and fuel injection pump module is monitored when ignition is on.Injection pump module is referred to as Fuel Pump Control Module (FPCM) in test procedures.DTC may be stored if the time between CAN messages is more than 3 seconds or FPCM does not.
U2201-00 CAN-Bus No Communication with EHU (Entertainment Head Unit) Opcom interface: vaux-com 120309 Reply: Hi you have to verify your ground and 12 volts in your obd2 connector on the car.
No power to A/C Control Switch. pull switch if no power back track to find open if power switch is bad the a/c relay runs the compressor a/c fuse powers relay fuse is powered by the ecm , ecm gets command from control switch, ecm reads all input and powers relay to send voltage to compressor. wire should go back to fuse box and be hot with key on.
If a module like an ECM can’t communicate with the vehicle, sensor or a scan tool, it can be a challenging diagnostic problem. One of the easiest tests to perform is to see if there is power and ground being supplied to the ECM. This can be performed by using the OBDII connector. Pin 16 is the positive voltage side being supplied to the ECM.
5/5 (21). Nov 12, · A CAT Engine takes three different 12 volt power supply wires to the ECM. 1) keyed from the ignition switch to pin 70, 2) 12 volt battery power to pin 52, 3) 12volt battery power pin 53 Usually pin 52 and 53 are feed power from the battery on one wire that splits before the two pins at the ECM.Read seb/cat-cengine-ecm.
Checked wiring to ecm. Ground on X3 73 is good. Confirmed B+ power to terminal 20 red-white on X1. I have no power to terminal 19 pink on X1. I checked backprobing, and plugging into the front of the connector (wanted to double check). I re-checked in the fuse box, and have power to both ecm fuses. Jumped power power to terminal 19 (pink.
Max. KEY ON POWER (fused 5 - 20 AMP max) Connect to main chassis ground Ignition Coil (negative side) - + ECU/ECM or Ignition Box (tach output) SPEED SENSOR SEN-01-5 16k PPM +12V CONSTANT POWER (fused 5 - 20 AMP max) BARE R L L UTPUT CLOCK PANEL +12V Light or Buzzer (4 Watts or less) +12V Light or Buzzer (4 Watts or more) Relay.
According to the 04 diagram its a Dark Blue one. If you have B+ power going in and coming out from it and there is NO power at ECM then the wire to ECM is broken some where. Check connection S165.:wink2: Im getting ready to go out and tear wire loom apart to find connection S165. .
c. Turn Ignition/Light Key Switch to IGNITION and wait approximately 10 seconds (4 seconds lamp ON, 6 seconds lamp OFF) for check engine lamp to start flashing. 3. All trouble codes are sent out as a series of flashes. To retrieve the first digit of the trouble code simply observe the number of times the lamp flashes.
Regarding BBBind.com schematic for ECU look under the engine/fuel category. Should see ECU pin outs. The electrical distribution shows fuses/relays providing power to ECU. Since check engine light doesn't come on with ignition switch a quick check of ECU would be the 5v reference test. The throttle body connector pin 5, key on, should have 5v.
Premium Member. Joined Nov 24, 2007. 15,560 Posts. #3 · Sep 2, 2011. Check fuse for cig lighter as that is the same fuse for the obd port, also some scanners will not work with our trucks, Only the high dollar ones from snap on or AE or a scangauge will work. S.
A typical ECM . Due to the immense power that the ECM has over your engine, there can be a lot of different symptoms when it goes bad. While we've listed some of the most common symptoms of a bad ECM below, it's not the primary cause for any of these.Make sure that you're checking for trouble codes and doing what you can to make sure it's not any of the more common causes of these. No power to the ecm - 2000 Nissan Altima. Posted by jcorbin1127 on Sep 16, 2010. Want Answer 0. Clicking this will make more experts see the question and we will remind you when it gets answered. 1 Comment; Flag; More. Print this page; Share this page; Add Your Answer..
Ouch, without more testing I would also think the TIPM is toast. Could also be the ECM. M19 and M21 get power when the ASD relay is activated (30 closed to 87). ECM activates the relay via 85-86. TIPM connector C2 pin 14 from ECM C3 Pin 3. ASD relay #30 and #85 slots should be hot.
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Functions of the Engine Control Module. The engine control module basically controls the intersection of the engine 's necessary ingredients to make energy -- fuel, air and spark. That sounds simple, kind of in the same way an engine itself sounds simple if you break it down into really basic terms. But the ECM accomplishes its considerable.