DTC P1676: CAN Communication (Reception Error for TCM) - Suzuki Jimny Workshop Manual
1A
DTC P1676: CAN Communication (Reception Error for TCM)
Wiring Diagram
| [A]: | ECM connector (viewed from harness side) | 1. | ECM |
| [B]: | TCM connector (viewed from harness side) | 2. | TCM |
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
|
Reception error of communication data for TCM is detected for longer than specified time continuously
(1 driving detection logic) |
•
ECM
• TCM • CAN communication line circuit |
DTC Confirmation Procedure
1)
Connect scan tool to DLC with ignition switch OFF.
2)
Turn ON ignition switch and clear DTC by using scan tool.
3)
Start engine and run it for 1 min. or more.
4)
Check DTC and pending DTC.
DTC Troubleshooting
| Step | Action | YES | NO |
|---|---|---|---|
| 1 |
Was “Engine and Emission Control System Check” performed?
|
Go to Step 2.
|
|
| 2 |
DTC check
1)
Connect scan tool to DLC with ignition switch turned OFF.
2)
Check ECM and TCM for DTC.
Is there any DTC(s) (other than DTC P1674, P1675, P1676 in ECM and DTC P1774, P1775, P1777 in TCM)?
|
Go to applicable DTC diag. flow.
|
Go to Step 3.
|
| 3 |
Check CAN communication error check for ECM
1)
Check ECM for DTC.
Is there DTC P1674?
|
Go to Step 4.
|
|
| 4 |
ECM and TCM connector check
1)
Check for proper connection at each ECM and TCM connector terminals with ignition switch turned OFF.
2)
If connections are OK, recheck ECM for DTC with engine running.
Is there DTC P1676?
|
Go to Step 5.
|
Intermittent trouble. Check for intermittent referring to
Intermittent and Poor Connection Inspection
.
|
| 5 |
ECM power and ground circuit check
1)
Check for ECM power and ground circuits referring to
MIL Does Not Light with Ignition Switch ON and Engine Does Not Start Though It Is Cranked Up:M13A with VVT
.
Are they in good condition?
|
Go to Step 6.
|
Repair ECM power and/or ground circuits.
|
| 6 |
DTC check in TCM
1)
Check DTC P1774 in TCM.
Is it indicated?
|
Go to Step 7.
|
|
| 7 |
CAN communication line circuit continuity check
1)
Disconnect connectors from ECM and TCM with ignition switch turned OFF.
2)
Measure resistance at the following connector terminals.
•
Between “E118-8” terminal of ECM connector and “E121-17” terminal of TCM connector
• Between “E118-7” terminal of ECM connector and “E121-7” terminal of TCM connector
Is each resistance below 1 Ω?
|
Go to Step 8.
|
Repair open or high resistance CAN communication line circuit referring to
Precaution for CAN Communication System
.
|
| 8 |
CAN communication line circuit insulation check
1)
Measure resistance between “E118-8” and “E118-7” terminals of ECM connector.
Is resistance infinity?
|
Go to Step 9.
|
Repair insulation of CAN communication line circuit referring to
Precaution for CAN Communication System
.
|
| 9 |
CAN communication line circuit ground short check
1)
Measure resistance at the following connector terminals.
•
Between “E118-8” terminal of ECM connector and vehicle body ground
• Between “E118-7” terminal of ECM connector and vehicle body ground
Is each resistance infinity?
|
Go to Step 10.
|
Repair shorted to ground of CAN communication line circuit referring to
Precaution for CAN Communication System
.
|
| 10 |
Check for short circuit of CAN communication line to power circuit
1)
Measure voltage at the following connector terminals with ignition switch turned ON.
•
Between “E118-8” terminal of ECM connector and vehicle body ground
• Between “E118-7” terminal of ECM connector and vehicle body ground
Is each voltage 0 – 1 V?
|
Substitute a known-good TCM and recheck. If DTC is still detected, substitute a known-good ECM and recheck.
|
Repair shorted to power supply of CAN communication line circuit referring to
Precaution for CAN Communication System
.
|
NOTE:
Upon completion of inspection and repair work, perform “DTC Confirmation Procedure” and confirm that the trouble has been corrected.