VSA DTC 61-12 (With Auto Idle Stop System) (2016)
DTC 61-12 : Modulator-Control Unit Power Source Circuit (IG) Low Voltage
NOTE: Before you troubleshoot, review the general troubleshooting information - Refer to:
How to Troubleshoot the VSA System (2014 2015 2016)
| DTC Description | DTC | Freeze Frame |
|---|---|---|
| 61-12 Modulator-Control Unit Power Source Circuit (IG) Low Voltage |
DTCs (VSA)
- Problem verification
- 1. Turn the vehicle to the ON mode.
- 2. Clear the DTC with the HDS.
- 3. Turn the vehicle to the OFF (LOCK) mode.
- 4. Start the engine, and warm it up to normal operating temperature (the radiator fan comes on).
- 5. Test-drive the vehicle at 6 mph (10 km/h) or more.
NOTE: Drive the vehicle on the road, not on a lift.
- 6. Check for DTCs with the HDS.
DTC Description DTC Freeze Frame 61-12 Modulator-Control Unit Power Source Circuit (IG) Low Voltage Is DTC 61-12 indicated?
YES
The failure is duplicated. Go to step 2.
NO
Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting - Refer to:
How to Troubleshoot the VSA System (2014 2015 2016)
If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the Freeze data/on-board snapshot.
- VSA modulator-control unit check 1
- 1. Check the parameter(s) below with the HDS.
Signal Threshold Current conditions Values Unit Values Unit BATTERY VOLTAGE Less than 9. 6 V Do the current condition(s) match the threshold?
YES
Go to step 3.
NO
Go to step 5.
- VSA modulator-control unit check 2
- 1. Check and note the parameter(s) below with the HDS.
Signal Current conditions Values Unit BATTERY VOLTAGE - 2. Using a voltmeter, measure and note the voltage across the 12 volt battery terminals.
- 3. Compare the voltage noted in step 3-1 to the voltage in step 3-2.
Is the difference between the two voltage readings more than 3 V?
YES
Go to step 4.
NO
Check the 12 volt battery - Refer to:
Battery Test (2016 2017 2018 2019 2020)
, and check the PGM-FI DTCs - Refer to:
How to Troubleshoot the Fuel and Emissions Systems (2014-20) or
How to Troubleshoot the Fuel and Emissions Systems (With Auto Idle Stop System) (2016-20)
- Open wire check (IG1 VSA (DC/DC) line)
- 1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the following connector.
VSA modulator-control unit 38P connector - 3. Turn the vehicle to the ON mode.
- 4. Measure the voltage between test points 1 and 2.
Test condition Vehicle ON mode VSA modulator-control unit 38P connector: disconnected Test point 1 VSA modulator-control unit 38P connector No. 36 - Refer to:
VSA Modulator-Control Unit Connector for Inputs and Outputs (2014 2015), or
VSA Modulator-Control Unit Connector for Inputs and Outputs (2016), or
VSA Modulator-Control Unit Connector for Inputs and Outputs (2017 2018 2019 2020)Test point 2 Body ground Is there battery voltage?
YES
The IG1 VSA (DC/DC) wire is OK. Go to step 5.
NO
Repair an open or high resistance in the wire between the No. H4 (7. 5 A) fuse in the auxiliary under-dash fuse/relay box and the VSA modulator-control unit.
- VSA modulator-control unit check (update)
- 1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Reconnect the following connector.
VSA modulator-control unit 38P connector - 3. Update the VSA modulator-control unit if it does not have the latest software.
- 4. Turn the vehicle to the OFF (LOCK) mode.
- 5. Start the engine, and warm it up to normal operating temperature (the radiator fan comes on).
- 6. Test-drive the vehicle at 6 mph (10 km/h) or more.
NOTE: Drive the vehicle on the road, not on a lift.
- 7. Check for DTCs with the HDS.
DTC Description DTC Freeze Frame Is DTC 61-12 indicated?
YES
Check for loose terminals and poor connections in the VSA modulator-control unit 38P connector. If the VSA modulator-control unit was updated and the symptom/indication is still present, replace the VSA modulator-control unit .
NO
Troubleshooting is complete.