Diagnosis Procedure
WARNING: This page is about a different car, the 2016 Infiniti Q50. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK CONNECTOR
- Turn the ignition switch OFF.
- Disconnect the 12V battery cable from the negative terminal.
- Check the following terminals and connectors for damage, bend and loose connection (unit side and connector side).
- IPDM E/R
- Harness connector E65 and fuse block (J/B) side connector
Is the inspection result normal?
YES
GO TO STEP 2 .
NO
Repair the terminal and connector.
- CHECK HARNESS FOR OPEN CIRCUIT
- Disconnect the connector of IPDM E/R.
- Check the resistance between the IPDM E/R harness connector terminals.
IPDM E/R harness connector Resistance (Ω) Connector No. Terminal No. E121 29 28 Approx. 54 - 66
Is the measurement value within the specification?
YES
GO TO STEP 3 .
NO
GO TO STEP 4 .
- CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the IPDM E/R. Refer to DIAGNOSIS PROCEDURE .
Is the inspection result normal?
YES (Present error)
Replace the IPDM E/R. Refer to REMOVAL AND INSTALLATION .
YES (Past error)
Error was detected in the IPDM E/R branch line.
NO
Repair the power supply and the ground circuit.
- CHECK HARNESS CONTINUITY (OPEN CIRCUIT)
- Disconnect the fuse block (J/B) harness connector E65.
- Check the continuity between the IPDM E/R harness connector and the fuse block (J/B) harness connector.
IPDM E/R harness connector Fuse block (J/B) harness connector Continuity Connector No. Terminal No. Connector No. Terminal No. E121 29 E65 9F Existed 28 5F Existed
Is the inspection result normal?
YES
Replace the fuse block (J/B).
NO
Repair the harness between the IPDM E/R harness connector E121 and the fuse block (J/B) harness connector E65.