P3136-914

P3136-914, P3136-915, P3136-916





Description
The hybrid vehicle control ECU monitors the connection status of the air bag diagnosis sensor unit (ACU)
(communication) line. If the ECU detects a malfunction, it will alert the driver.




DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC confirmation procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.
- GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON and wait at least 10 seconds.
2. Check DTC.
Is DTC detected?
YES - Go to "Diagnosis Procedure".
NO - INSPECTION END




Diagnosis Procedure
1.PRECONDITIONING
- Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
- After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals.
- Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
- GO TO 2.
2.CHECK DTC FOR ACU
1. Turn ignition switch ON.
2. Check DTC for ACU. Refer to CONSULT-III Function (Air Bag).
Is DTC detected?
YES - Go to diagnosis procedure relevant to output DTC.
NO - GO TO 3.
3.CHECK HARNESS BETWEEN HYBRID VEHICLE CONTROL ECU AND ACU
1. Turn ignition switch OFF.
2. Disconnect hybrid vehicle control ECU harness connector E66.
3. Disconnect ACU harness connector M35.
4. Measure the resistance according to the value(s) in the table below.
















OK or NG
OK - GO TO 5.
NG - GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors M89, E64
- Harness continuity between hybrid vehicle control ECU and ACU
- Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident.
- Check the connection and terminal contact pressure of connectors and wire harness between the hybrid vehicle control ECU and ACU.
- Turn ignition switch ON, jiggle the connectors and wire harness.
Is the inspection result normal?
YES - Replace hybrid vehicle control ECU (See Removal And Installation).
NO - Repair or replace harness or connectors.