Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Diagnosis Procedure
- CHECK GROUND CONNECTION
- Turn ignition switch OFF.
- Check ground connections M95, E46. Refer to Ground Inspection in
"CIRCUIT INSPECTION
".
Is the inspection result normal?
YES: GO TO 2.
NO: Repair or replace ground connection.
- CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT
- Disconnect VVEL control module harness connector.
- Check the continuity between VVEL control module harness connector and ground.
VVEL control module Ground Continuity Connector Terminal E15 14 Ground Existed - Also check harness for short to power.
Is the inspection result normal?
YES: GO TO 3.
NO: Repair open circuit or short to power in harness connectors.
- CHECK VVEL CONTROL MODULE POWER SUPPLY CIRCUIT-I
- Reconnect VVEL control module harness connector.
- Turn ignition switch ON.
- Check the voltage between VVEL control module harness connector.
VVEL control module Voltage Connector + - Terminal Terminal E15 8 14 After turning ignition switch OFF, battery voltage will exist for a few seconds, then drop to approximately 0 V. Is the inspection result normal?
YES: GO TO 4.
NO: GO TO 5.
- CHECK INTERMITTENT INCIDENT
Refer to "INTERMITTENT INCIDENT ".
Is the inspection result normal?
YES: Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION ".
NO: Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK VVEL CONTROL MODULE POWER SUPPLY CIRCUIT-II
- Turn ignition switch OFF and wait at least 10 seconds.
- Check the voltage between ECM harness connector terminals.
ECM Voltage + - Connector Terminal Connector Terminal F101 24 M107 128 Battery voltage Is the inspection result normal?
YES: GO TO 9.
NO: GO TO 6.
- CHECK VVEL CONTROL MODULE POWER SUPPLY CIRCUIT-III
- Disconnect ECM harness connector.
- Disconnect IPDM E/R harness connector.
- Check the continuity between ECM harness connector and IPDM E/R harness connector.
ECM IPDM E/R Continuity Connector Terminal Connector Terminal F101 24 E7 69 Existed - Also check harness for short to ground and short to power.
Is the inspection result normal?
YES: GO TO 8.
NO: GO TO 7.
- DETECT MALFUNCTIONING PART
Check the following.
- Harness or connectors E3, F1
- Harness or connectors F104, F105
- Harness for open or short between ECM and IPDM E/R
: Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK 15 A FUSE
- Disconnect 15 A fuse (No. 50) from IPDM E/R.
- Check 15 A fuse.
Is the inspection result normal?
YES: GO TO 9.
NO: Replace 15A fuse.
- CHECK VVEL CONTROL MODULE POWER SUPPLY CIRCUIT-IV
- Disconnect ECM harness connector.
- Disconnect IPDM E/R harness connector.
- Check the continuity between ECM harness connector and IPDM E/R harness connector.
ECM IPDM E/R Continuity Connector Terminal Connector Terminal M107 125 E7 49 Existed - Also check harness for short to ground and short to power.
Is the inspection result normal?
YES: GO TO 11.
NO: GO TO 10.
- DETECT MALFUNCTIONING PART
Check the following.
- Harness or connectors E106, M6
- Harness for open or short between ECM and IPDM E/R
: Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK INTERMITTENT INCIDENT
Refer to "INTERMITTENT INCIDENT ".
Is the inspection result normal?
YES: Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION ".
NO: Repair open circuit, short to ground or short to power in harness or connectors.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
No obligation. See pricing before you book.