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DTC P0A45: Resolver malfunction
 
 
 
 
MONITOR EXECUTION
  • Continuous
 
 
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
  • Not applicable
Sensor (The sensor below is determined to be normal)
  • Not applicable
 
 
DTC SET CONDITIONS
Logic Flow Chart
Check Conditions
  • REMCU power supply voltage is 8 volts to 16 volts.
Judgment Criterion
  • Status fail for 0.3 second.
 
 
OBD-II DRIVE CYCLE PATTERN
  • Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 1 .
 
 
PROBABLE CAUSES
  • The resolver circuit fails
  • Malfunction of the rear motor/rear transaxle assembly
  • Malfunction of the REMCU

 
 
DIAGNOSIS
Required Special Tools
  • MB991223: Wiring harness set
  • MB992006: Extra fine probe
STEP 1. Check the REMCU connector
Check the REMCU connector (S1 line, S2 line, S3 line, S4 line, R1 line and R2 line) visually for semi-fitting, damage, moisture/foreign matter intrusion.
Is the check result normal?
Go to step 2.
: Properly fit the REMCU connector. Then go to Step 5.
: Replace the wiring harness (S1 line, S2 line, S3 line, S4 line, R1 line and R2 line). Then go to Step 5.
: Replace the wiring harness (S1 line, S2 line, S3 line, S4 line, R1 line and R2 line) and REMCU (Refer to ). Then go to Step 5.
: Replace the REMCU (Refer to ). Then go to Step 5.
 
STEP 2. Check the rear motor assembly.
Drive the vehicle to check whether there is abnormal sound or rotation trouble in the rear motor.
Is the check result normal?
Go to Step 3.
Replace the rear motor/rear transaxle assembly (Refer to ). Then go to Step 5.
 
STEP 3. Resolver resistance check
(1) Disconnect the REMCU connector.
(2) Measure the resistance between the rear motor connector terminals.
 
Terminal symbolNormal value
R1-R229 - 38Ω
S1-S370 - 92Ω
S2-S460 - 83Ω
Is the check result normal?
Replace the wiring harness (S1 line, S2 line, S3 line, S4 line, R1 line and R2 line), rear motor assembly (Refer to ) and REMCU (Refer to ). Then go to Step 5.
Go to Step 4.
 
STEP 4. Resistance measurement between the REMCU connector and the rear motor assembly connector (S1 line, S2 line, S3 line, S4 line, R1 line and R2 line)
(1) Remove the wiring harness (S1 line, S2 line, S3 line, S4 line, R1 line and R2 line).
(2) Check the continuity of wring harness (S1 line, S2 line, S3 line, S4 line, R1 line and R2 line).
OK: Continuity exists (2 Ω or less)
Is the check result normal?
Replace the rear motor assembly (Refer to ). Then go to Step 5.
Replace the wiring harness (S1 line, S2 line, S3 line, S4 line, R1 line and R2 line). Then go to Step 5.
 
STEP 5. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 1 .
(2) Check the DTC.
Is the DTC set?
Retry the troubleshooting.
The inspection is complete.