C1761

SUSPENSION CONTROL: AIR SUSPENSION SYSTEM: C1761/61: ECU Malfunction

DTC C1761/61 - ECU Malfunction

DESCRIPTION





INSPECTION PROCEDURE

PROCEDURE

1. CONFIRM DTC
(a) Check DTCs .
(1) Confirm if the DTC C1774/74 is recorded.
OK:
DTC C1774/74 is not output.
HINT:
- If DTC C1774/74 (power source circuit) is displayed, carry out the inspection necessary. C1774.
- If DTC C1711/11 (right front height control sensor circuit), C1712/12 (left front height control sensor circuit), C1713/13 (right rear height control sensor circuit), C1714/14 (left rear height control sensor circuit) and C1761/61 (ECU malfunction) is output at the same time, carry out the inspection necessary for DTC C1761/61 first.

NG -- REPAIR CIRCUIT INDICATED BY OUTPUT CODE
OK -- Continue to next step.
2. CHECK HEIGHT CONTROL OFF INDICATOR LIGHT
(a) Turn the ignition switch to the ON position.
(b) Check the height control OFF indicator light.
OK:
Height control OFF indicator light comes on.
NG -- REPLACE SUSPENSION CONTROL ECU
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (HEIGHT CONTROL SENSOR SUB-ASSEMBLY POWER SOURCE))





(a) Disconnect the height control sensor sub-assembly connector.
(b) Turn the ignition switch ON.
(c) Measure the voltage according to the values in the table below.
Standard resistance (Front RH)::






Standard resistance: (Front LH)::






Standard resistance: (Rear RH)::






Standard resistance: (Rear LH)::






NG -- CHECK HEIGHT CONTROL SENSOR SUB-ASSEMBLY CIRCUIT
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL ECU - AFS ECU)
(a) Turn the ignition switch to the OFF position.
(b) Disconnect the suspension control ECU S15 connector.
(c) Measure the resistance according to the values in the table below.
Standard resistance:






NG -- REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. INSPECT SUSPENSION CONTROL ECU
(a) Turn the ignition switch to the OFF position.
(b) Measure the voltage according to the values in the table below.
Standard voltage:






NG -- CHECK POWER SOURCE CIRCUIT
OK -- REPLACE SUSPENSION CONTROL ECU