On-Board Diagnostic System Description - Suzuki Jimny Workshop Manual
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On-Board Diagnostic System Description
M13 Engine Model with VVT
For automatic transmission control system, TCM has following functions.
•
When the ignition switch is turned ON with the engine at a stop, malfunction indicator lamp (MIL) (1) turns ON to check the bulb of the MIL.
• When TCM detects a malfunction in A/T control system (and/or a malfunction which gives an adverse effect to vehicle emission) while the engine is running, TCM requires ECM to make the malfunction indicator lamp in the meter cluster of the instrument panel turn ON. TCM stores DTC / freeze frame data in TCM memory.
(If it detects that continuously 3 driving cycles are normal after detecting a malfunction, however, it makes MIL turn OFF although DTC stored in its memory will remain.)
• It is possible to communicate with TCM through DLC (3) by using scan tool (4). (Diagnostic information can be accessed by using a scan tool.)
• It is also possible to output DTC stored in TCM by flashing of transmission warning light (2) with diagnosis switch terminal (6) of monitor connector (5) grounded. If no DTC is stored in TCM memory, DTC No.12 is outputted repeatedly. If one or more DTCs are stored in TCM memory, they are outputted three times per one code starting from smallest code number in increasing order. After all DTCs are outputted, they are outputted again in the same manner.
• When TCM detects a malfunction in A/T control system (and/or a malfunction which gives an adverse effect to vehicle emission) while the engine is running, TCM requires ECM to make the malfunction indicator lamp in the meter cluster of the instrument panel turn ON. TCM stores DTC / freeze frame data in TCM memory.
(If it detects that continuously 3 driving cycles are normal after detecting a malfunction, however, it makes MIL turn OFF although DTC stored in its memory will remain.)
• It is possible to communicate with TCM through DLC (3) by using scan tool (4). (Diagnostic information can be accessed by using a scan tool.)
• It is also possible to output DTC stored in TCM by flashing of transmission warning light (2) with diagnosis switch terminal (6) of monitor connector (5) grounded. If no DTC is stored in TCM memory, DTC No.12 is outputted repeatedly. If one or more DTCs are stored in TCM memory, they are outputted three times per one code starting from smallest code number in increasing order. After all DTCs are outputted, they are outputted again in the same manner.
2 driving cycle detection logic
The malfunction detected in the first driving cycle is stored in TCM memory (in the form of pending DTC and freeze frame data) but the malfunction indicator lamp does not light at this time. It lights up at the second detection of same malfunction also in the next driving cycle.
Pending DTC
Pending DTC means a DTC detected and stored temporarily at 1 driving cycle of the DTC which is detected in the 2 driving cycle detection logic.
Freeze frame data
TCM stores the engine and driving conditions at the moment of the detection of a malfunction in its memory. This data is called “Freeze frame data”.
Therefore, it is possible to know engine and driving conditions (e.g., whether the engine was warm or not, where the vehicle was running or stopped) when a malfunction was detected by checking the freeze frame data.
M13 Engine Model without VVT
For automatic transmission control system, TCM has following functions.
•
When ignition switch is turned ON with no malfunction in A/T control system is detected, transmission warning light (1) lights for about 2 seconds after ignition switch is turned ON and then goes OFF for bulb check.
• When TCM detects a malfunction in A/T control system, it indicates transmission warning light (1) and stores malfunction DTC in its memory.
• It is possible to communicate with TCM through data link connector (DLC) (2) by using SUZUKI scan tool (3). Diagnostic information can be checked and erased by using scan tool.
• It is also possible to output DTC stored in TCM by flashing of transmission warning light (1) with diagnosis switch terminal (5) of monitor connector (4) grounded. If no DTC is stored in TCM memory, DTC No.12 is outputted repeatedly. If one or more DTCs are stored in TCM memory, they are outputted three times per one code starting from smallest code number in increasing order. After all DTCs are outputted, they are outputted again in the same manner.
• When TCM detects a malfunction in A/T control system, it indicates transmission warning light (1) and stores malfunction DTC in its memory.
• It is possible to communicate with TCM through data link connector (DLC) (2) by using SUZUKI scan tool (3). Diagnostic information can be checked and erased by using scan tool.
• It is also possible to output DTC stored in TCM by flashing of transmission warning light (1) with diagnosis switch terminal (5) of monitor connector (4) grounded. If no DTC is stored in TCM memory, DTC No.12 is outputted repeatedly. If one or more DTCs are stored in TCM memory, they are outputted three times per one code starting from smallest code number in increasing order. After all DTCs are outputted, they are outputted again in the same manner.