StabiloBoss
14th February, 2023, 05:29 PM
Hi,
In the car does not work air conditioning, wipers, turn signals, etc. Suspicion fell on the UCH module (8200300703). I opened it, nothing damaged can be seen, measurements show no short circuits but I have one uncertain circuit. It is about the BTS780GP. On pins 1,2 and 13,14 "Source of low-side switch 1" and "Source of low-side switch 2" to GND I have 0.150mV in diode test or 150ohm. Other inputs like "Source of high-side switch 1" or "Source of high-side switch 2" has normally 0.6mV in diode drop so these circuits are ok. Is it supposed to look like this or is the circuit faulty? I understand that the immobilizer is in the Motorola processor? Is there a pinout available somewhere for reading with e.g. carprog or do you have to connect directly to the circuit or completely solder it to the new UCH?
In the car does not work air conditioning, wipers, turn signals, etc. Suspicion fell on the UCH module (8200300703). I opened it, nothing damaged can be seen, measurements show no short circuits but I have one uncertain circuit. It is about the BTS780GP. On pins 1,2 and 13,14 "Source of low-side switch 1" and "Source of low-side switch 2" to GND I have 0.150mV in diode test or 150ohm. Other inputs like "Source of high-side switch 1" or "Source of high-side switch 2" has normally 0.6mV in diode drop so these circuits are ok. Is it supposed to look like this or is the circuit faulty? I understand that the immobilizer is in the Motorola processor? Is there a pinout available somewhere for reading with e.g. carprog or do you have to connect directly to the circuit or completely solder it to the new UCH?