C1711
SUSPENSION CONTROL: AIR SUSPENSION SYSTEM: C1711: Front Height Control Sensor RH Circuit Malfunction
DTC C1711 - Front Height Control Sensor RH Circuit Malfunction
DTC C1712 - Front Height Control Sensor LH Circuit Malfunction
DTC C1713 - Rear Height Control Sensor RH Circuit Malfunction
DTC C1714 - Rear Height Control Sensor LH Circuit Malfunction
DESCRIPTION
The height control sensor sub-assembly controls the resistance value by following changes in vehicle height. The suspension control ECU detects the change in vehicle height from the transformed voltage. The suspension control ECU outputs a constant voltage of 5 V to the SHB terminal of the height control sensor sub-assembly.
In the height control sensor the voltage is changed due to the resistance. The changed voltage is output from the SHFR terminal of the height control sensor sub-assembly to suspension control ECU, thus the vehicle height is detected.
HINT:
- If DTC C1711/11, C1712/12, C1713/13 or C1714/14 is output, the vehicle height control is suspended. Height control OFF switch on the combination meter assembly comes on and the vehicle height indicator "N" comes on or blink.
- If the normal signal is output from the height control sensor sub-assembly while suspending the vehicle height control, the vehicle height control is resumed. The operation is also resumed when the ignition switch is turned off once, then turned on again.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT: Proceed to troubleshooting following the flow chart, regardless of whether or not DTCs C1711/11, C1712/12, C1713/13 or C1714/14 are displayed.
PROCEDURE
1. RECONFIRM DTC
(a) Check DTCs .
(1) Confirm if DTC C1761/61 and/or C1774/74 is recorded.
OK:
DTC C1761/61 and/or C1774/74 is not output.
HINT: If either DTCC1761/61 (ECU malfunction) or C1774/74 (power source circuit) is displayed, carry out the necessary inspection. If they are output at the same time, carry out the necessary inspection for DTC C1774/74 first.
NG -- REPAIR CIRCUIT INDICATED BY OUTPUT CODE
OK -- Continue to next step.
2. READ VALUE USING INTELLIGENT TESTER
HINT: When not using the intelligent tester, go to step 3.
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position, and push the intelligent tester main switch ON.
(c) Select the item below in the DATA LIST, and read its value displayed on the intelligent tester.
AIRSUS:
(d) Check the vehicle height value of each sensor while pressing the height control switch "UP" and "DOWN".
OK:
Vehicle height value changes
NG -- CHECK HARNESS AND CONNECTOR (HEIGHT CONTROL SENSOR SUB-ASSEMBLY POWER SOURCE)
OK -- REPLACE SUSPENSION CONTROL ECU
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 voltage (Front RH): (C1711/11):
Standard voltage: (Front LH): (C1712/12):
Standard voltage: (Rear RH): (C1713/13):
Standard voltage: (Rear LH): (C1714/14):
NG -- CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL ECU- HEIGHT CONTROL SENSOR SUB-ASSEMBLY)
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL ECU - HEIGHT CONTROL SENSOR SUB-ASSEMBLY)
(a) Disconnect the suspension control ECU S16 or S14 connector.
(b) Measure the resistance according to the values in the table below.
Standard resistance (Front RH): (C1711/11):
Standard resistance: (Front LH): (C1712/12):
Standard resistance: (Rear RH): (C1713/13):
Standard resistance: (Rear LH): (C1714/14):
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. INSPECT HEIGHT CONTROL SENSOR SUB-ASSEMBLY
(a) HEIGHT CONTROL SENSOR FRONT RH: (C1711/11)
(1) Measure the resistance according to the values in the table below.
Standard resistance:
Result:
(b) HEIGHT CONTROL SENSOR FRONT LH: (C1712/12)
(1) Measure the resistance according to the values in the table below.
Standard resistance:
Result:
(c) HEIGHT CONTROL SENSOR REAR RH: (C1713/13)
(1) Measure the resistance according to the values in the table below.
Standard resistance:
Result:
(d) HEIGHT CONTROL SENSOR REAR LH: (C1714/14)
(1) Measure the resistance according to the values in the table below.
Standard resistance:
Result:
E -- REPLACE HEIGHT CONTROL SENSOR SUB-ASSEMBLY REAR LH
D -- REPLACE HEIGHT CONTROL SENSOR SUB-ASSEMBLY REAR RH
C -- REPLACE HEIGHT CONTROL SENSOR SUB-ASSEMBLY FRONT LH
B -- REPLACE HEIGHT CONTROL SENSOR SUB-ASSEMBLY FRONT RH
A -- REPLACE SUSPENSION CONTROL ECU
6. CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL ECU- HEIGHT CONTROL SENSOR SUB-ASSEMBLY)
(a) Disconnect the suspension control ECU connectors.
(b) Measure the resistance according to the values in the table below.
Standard resistance (Front RH): (C1711/11):
Standard resistance: (Front LH): (C1712/12):
Standard resistance: (Rear RH): (C1713/13):
Standard resistance: (Rear LH): (C1714/14):
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
7. CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL ECU - HEIGHT CONTROL SENSOR SUB-ASSEMBLY)
(a) Disconnect the suspension control ECU S16 or S14 connector.
(b) Measure the resistance according to the values in the table below.
Standard resistance (Front RH): (C1711/11):
Standard resistance: (Front LH): (C1712/12):
Standard resistance: (Rear RH): (C1713/13):
Standard resistance: (Rear LH): (C1714/14):
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
8. CHECK HEIGHT CONTROL SENSOR SUB-ASSEMBLY
(a) HEIGHT CONTROL SENSOR FRONT RH: (C1711/11)
(1) Measure the resistance according to the values in the table below.
Standard resistance:
Result:
(b) HEIGHT CONTROL SENSOR FRONT LH: (C1712/12)
(1) Measure the resistance according to the values in the table below.
Standard resistance:
Result:
(c) HEIGHT CONTROL SENSOR REAR RH: (C1713/13)
(1) Measure the resistance according to the values in the table below.
Standard resistance:
Result:
(d) HEIGHT CONTROL SENSOR REAR LH: (C1714/14)
(1) Measure the resistance according to the values in the table below.
Standard resistance:
Result:
E -- REPLACE HEIGHT CONTROL SENSOR SUB-ASSEMBLY REAR LH
D -- REPLACE HEIGHT CONTROL SENSOR SUB-ASSEMBLY REAR RH
C -- REPLACE HEIGHT CONTROL SENSOR SUB-ASSEMBLY FRONT LH
B -- REPLACE HEIGHT CONTROL SENSOR SUB-ASSEMBLY FRONT RH
A -- REPLACE SUSPENSION CONTROL ECU