Hardware        




OBD2 Diagnostics

OBD2 diagnostic links will be either ISO 9141-2 or KWP2000 up to around 2006 and OBD2 over CANBus on later models, the dates are both market and model specific. These protocols are covered fairly comprehensively on other sites so I won't detail them here. Scan tools are available in two types, those that can read and clear trouble codes and those that can also read live data from the ECU, the later type are obviously a great deal more useful when fault finding. Before purchasing an OBD2 tool I recommend asking for recommendations on the various Suzuki forums, there are known problems with OBD2 tools and Suzuki ECUS. These problems appear to be limited to multi-protocol tools and may be caused by them sending an initialisation sequence using an incorrect protocol before switching to the correct protocol. Unfortunately OBD2 encompasses a number of different protocols and although there are specific requirements for scan tools for each protocol there doesn't seem to be any requirements for a multi-protocol tool.

The OBD2 specification defines 'Parameter IDs' for a number of different functions. The Suzuki ECUs support all the defined PIDs and also have some manufacturer specific PIDs. PIDs up to 1000 are part of the OBD2 standard and are published on many internet sites. Suzuki specific codes are listed below, I cannot guarantee that I have listed all of them.

Suzuki specific PID descriptions:
P1408
MAP Sensor circuit malfunction
P1450
Barometric Sensor circuit malfunction
P1451
MAP v Barometric Sensor discrepancy when cranking
P1500
Starter signal circuit malfunction
P1510
ECU back up supply failure
P1875
4wd Low switch circuit
P1620
ECU code not registered
P1621
No code transmitted from immobiliser
P1622
ECM Fault
P1623
ECU Code no matched













Key Words

ECU ECM engine management control suzuki geo vitara sidekick tracker DSM MH6211 MH6111 air temperature sensor repair caps ignition map 3d performance tuning diy efi water temperature manifold pressure software pcb map reprogram datalog o2 sensor lambda egr tbi mpi repair rhinopower