Sensor position
QHope you can help with a Suzuki Jimny engine coolant temperature sensor location. My girlfriends 2005 Suzuki Jimny 1.3 petrol, manual, has had an engine light coming on and off for about a year now, so I got it scanned by a friend and we got a P0115 code which I understand is an engine coolant temperature sensor.
I called a parts supplier hoping that once I have the item I will match the new sensor to its correct location, but, he gave me two options; 3-pin (triangle shape) and 2-pin (oval shape). I looked all around the engine and couldn’t figure out which sensor is it, or the sensor’s location. I am also attaching pictures of sensors I identified on the block.
Also, recently, the engine didn’t want to start in the morning so I connected a jump starter and off she went. Next day I had to jump-start it again, so I decided to charge the battery even though it seemed like it was holding a decent charge according to my NOCO charger. Needless to say, even after recharging the battery I had to jump-start it again and again although the battery held and the car manages to start for the reminder of the day (two or three times), but back to jump-start next morning seems to be the new routine.
The battery feels weak (engine turning over but sort of dying). I took the measurements and I have 12.53 volts at the battery (after it was resting for an hour or so), at idle I am getting 14.4 or there abouts – so I’m hoping the alternator is alright. I know the battery is probably over three-years-old as this is how long we had the car so my question is: Is it the battery that needs changing or could it be related to that engine coolant temperature sensor.
I have identified seven sensors on the engine as per attached photos; front of engine fairly high (3-pin oval); one sensor next to/behind alternator; three sensors on the throttle body driver side; one sensor on throttle body passenger side; one sensor in the block (driver side of the block – kind of behind throttle body). The Suzuki is 4-wheel-drive with the low ratio and 4-wheel drive being activated by second gearstick.
Wojtek Holub
AThe code P0115 is related to the coolant temperature sensor and is indicating a circuit malfunction. This may be because the sensor is faulty or it may be indicating a problem with the wiring between the temperature sensor and the engine control module. In less common cases it could also be indicating a problem with the engine control module itself.
The coolant temperature sensor on your Suzuki is shown on the wiring diagram I have as a two-wire unit. The wires should be Black/blue and Green/black. The sensor is actually located at the rear of the engine. Unfortunately, some of the pictures you sent showing the sensors are too close for me to correctly identify the units.
From the ones I can identify the sensors on the photos you have sent are: Number 1 MAP sensor, Number 2 idle air control valve, number 3 EVAP canister purge valve, number 4 knock sensor, number 7 camshaft sensor.
The starting problems you indicate do appear to point to the battery being weak, as when attaching a jump-start the problem is resolved. With the battery at least three-years-old and of course it is not known how long it has been on the Suzuki before that, I would certainly consider renewing it. As you have checked and found that the battery is being charged sufficiently, it would appear to be having difficulty retaining sufficient power to provide the starting boost after an overnight rest.