P3108-538

L110 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P3108-535: A/C Amplifier Communication Circuit Malfunction

DTC P3108-535 - A/C Amplifier Communication Circuit Malfunction

DTC P3108-536 - A/C Amplifier Communication Circuit Malfunction

DTC P3108-538 - A/C Amplifier Communication Circuit Malfunction

DESCRIPTION
- The hybrid vehicle control ECU detects a wiring malfunction in the serial communication line between it and the with motor compressor assembly.

WIRING DIAGRAM

INSPECTION PROCEDURE
CAUTION:
- 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. After waiting, check the voltage at the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
HINT: Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

PROCEDURE

1. CHECK DTC OUTPUT (HV)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(d) Read output DTCs.
Result:

HINT: DTC P3108-535 may be stored due to an open circuit in the SMRB circuit or SMRG circuit.

YES -- GO TO DTC CHART
NO -- Continue to next step.
2. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR)

(a) Check the connection of the hybrid vehicle control ECU connector.
Result:
The connector is connected securely and there are no contact problems.
NG -- CONNECT SECURELY
OK -- Continue to next step.
3. CHECK CONNECTOR CONNECTION CONDITION (WITH MOTOR COMPRESSOR ASSEMBLY CONNECTOR)

(a) Check the connection of the with motor compressor assembly connector.
Result:
The connector is connected securely and there are no contact problems.
NG -- CONNECT SECURELY
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (WITH MOTOR COMPRESSOR ASSEMBLY POWER SOURCE CIRCUIT)
(a) Turn the power switch off.

(b) Disconnect connector E85 from the with motor compressor assembly.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):

(d) Turn the power switch on (IG).
(e) Measure the voltage according to the value(s) in the table below.
Standard voltage:

NOTE: Turning the power switch on (IG) with the with motor compressor assembly connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. CHECK DTC OUTPUT (HV)
(a) Connect the with motor compressor assembly connector.
(b) Connect the Techstream to the DLC3.
(c) Turn the power switch on (IG).
(d) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(e) Read output DTCs.
Result:

B -- CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - WITH MOTOR COMPRESSOR ASSEMBLY)
A -- Continue to next step.
6. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - WITH MOTOR COMPRESSOR ASSEMBLY)

(a) Disconnect connector E84 from the hybrid vehicle control ECU.
(b) Disconnect connector E85 from the with motor compressor assembly.
(c) Turn the power switch on (IG).
(d) Measure the voltage according to the value(s) in the table below.
Standard voltage:

NOTE: Turning the power switch on (IG) with the hybrid vehicle control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.
(e) Turn the power switch off.
(f) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):

Standard resistance (Check for short):

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
7. CHECK HYBRID VEHICLE CONTROL ECU
(a) Turn the power switch off.
(b) Connect the connector to the hybrid vehicle control ECU.

(d) Turn the power switch on (IG).
(e) Measure the voltage according to the value(s) in the table below.
Standard voltage:

NOTE: Turning the power switch on (IG) with the with motor compressor assembly disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

NG -- REPLACE HYBRID VEHICLE CONTROL ECU
OK -- Continue to next step.
8. CHECK WITH MOTOR COMPRESSOR ASSEMBLY
(a) Turn the power switch off.
(b) Connect the connector to the with motor compressor assembly.
(c) Disconnect connector E84 from the hybrid vehicle control ECU.

(d) Measure the resistance according to the value(s) in the table below.
Standard resistance:

(e) Turn the power switch on (IG).
(f) Measure the voltage according to the value(s) in the table below.
Standard voltage:

NOTE: Turning the power switch on (IG) with the hybrid vehicle control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

NG -- REPLACE WITH MOTOR COMPRESSOR ASSEMBLY
OK -- REPLACE HYBRID VEHICLE CONTROL ECU
9. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - WITH MOTOR COMPRESSOR ASSEMBLY)

(a) Disconnect connector E84 from the hybrid vehicle control ECU.
(b) Disconnect connector E85 from the with motor compressor assembly.
(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:

NOTE: Turning the power switch on (IG) with the hybrid vehicle control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.
(d) Turn the power switch off.
(e) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):

Standard resistance (Check for short):

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
10. CHECK HYBRID VEHICLE CONTROL ECU
(a) Turn the power switch off.
(b) Connect the connector to the hybrid vehicle control ECU.

(d) Turn the power switch on (IG).
(e) Measure the voltage according to the value(s) in the table below.
Standard voltage:

NOTE: Turning the power switch on (IG) with the with motor compressor assembly disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

NG -- REPLACE HYBRID VEHICLE CONTROL ECU
OK -- Continue to next step.
11. CHECK WITH MOTOR COMPRESSOR ASSEMBLY
(a) Turn the power switch off.
(b) Connect the connector to the with motor compressor assembly.

(c) Disconnect connector E84 from the hybrid vehicle control ECU.
(d) Measure the resistance according to the value(s) in the table below.
Standard resistance:

(e) Turn the power switch on (IG).
(f) Measure the voltage according to the value(s) in the table below.
Standard voltage:

NOTE: Turning the power switch on (IG) with the hybrid vehicle control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

NG -- REPLACE WITH MOTOR COMPRESSOR ASSEMBLY
OK -- REPLACE HYBRID VEHICLE CONTROL ECU