Honda HR-V: DTC C1840-14 (47-02): Differential Fluid Pressure Sensor Circuit Low Voltage (AWD)
NOTE: Before you troubleshoot, review the General Troubleshooting Information for the AWD with intelligent control system.
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1. Problem verification:
- Start the engine.
- Check the parameter(s) below with the HDS.
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Do the current condition(s) match the threshold?
YES
The failure is duplicated. Go to step 2.
NO
Intermittent failure, the system is OK at this time. 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.
2. Determine possible failure area (PS1 line, others):
- Turn the vehicle to the OFF (LOCK) mode.
- Disconnect the following connector.
Rear differential fluid pressure sensor 3P connector
- Turn the vehicle to the ON mode.
- Check the parameter(s) below with the HDS.
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Do the current condition(s) match the threshold?
YES
Go to step 4.
NO
Go to step 3.
3. Shorted wire check (PS1 line):
- Turn the vehicle to the OFF (LOCK) mode.
- Disconnect the following connector.
AWD control unit 24P connector
- Check for continuity between test points 1 and 2.
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Is there continuity?
YES
Repair a short to ground or the SG wire in the PS1 wire between the rear differential fluid pressure sensor and the AWD control unit.
NO
Update the AWD control unit if it does not have the latest software, or substitute a known-good AWD control unit, and recheck. If the symptom/indication goes away with the updated AWD control unit, troubleshooting is complete. If the symptom/indication goes away with a known-good AWD control unit, replace the original AWD control unit.
4. Determine possible failure area (rear differential fluid pressure sensor, SVCC line):
Measure the voltage between test points 1 and 2.
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Is there about 5 V?
YES
Replace the rear differential fluid pressure sensor.
NO
Go to step 5.
5. Open wire check (SVCC line):
- Turn the vehicle to the OFF (LOCK) mode.
- Disconnect the following connector.
AWD control unit 24P connector
- Check for continuity between test points 1 and 2.
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Is there continuity?
YES
Update the AWD control unit if it does not have the latest software, or substitute a known-good AWD control unit, and recheck. If the symptom/indication goes away with the updated AWD control unit, troubleshooting is complete. If the symptom/indication goes away with a known-good AWD control unit, replace the original AWD control unit.
NO
Repair an open in the SVCC wire between the rear differential fluid pressure sensor and the AWD control unit.
READ NEXT:
DTC C1841-11 (42-02): Differential Fluid Temperature Sensor Circuit
Low Voltage (AWD)
NOTE: Before you troubleshoot, review the General Troubleshooting Information
for the AWD with
intelligent control system.
1. Problem verification:
Turn the vehicle to the ON mode.
Check the para
DTC C1841-13 (42-01): Differential Fluid Temperature Sensor Circuit
High Voltage (AWD)
NOTE: Before you troubleshoot, review the General Troubleshooting Information
for the AWD with
intelligent control system.
1. Problem verification:
Turn the vehicle to the ON mode.
Check the para
DTC C1841-27 (43-01): Differential Fluid Temperature Sensor Circuit
Range/Performance Problem (AWD)
NOTE: Before you troubleshoot, review the General Troubleshooting Information
for the AWD with
intelligent control system.
1. DTC check:
Turn the vehicle to the ON mode.
Check for DTCs with the H
SEE MORE:
Engine Performance Diagnostic Routine Outline
* PLEASE READ THIS FIRST *
NOTE: This article is generic in nature and all information does not apply
to all
vehicles. For vehicle specific information, see the appropriate articles in the
ENGINE PERFORMANCE category.
WHERE DOES DRIVEABILITY DIAGNOSIS START?
PERFORM BASIC INSPECTION
NOTE: This art
Rocker Arms & Assemblies
NOTE: Examples used in this article are general in nature and do not
necessarily relate
to a specific engine or system. Illustrations and procedures have been chosen
to guide mechanic through engine overhaul process. Descriptions of processes
of cleaning, inspection, assembly and machine shop pract
