DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
READ VALUE USING INTELLIGENT TESTER (IG POWER SOURCE VOLTAGE)
INSPECT FUSE (ECU-IG NO. 4)
INSPECT COWL SIDE JUNCTION BLOCK RH (IG NO. 4 RELAY)
CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK RH - ECU AND BODY GROUND)
CHECK HARNESS AND CONNECTOR (BATTERY - COWL SIDE JUNCTION BLOCK RH)
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - COWL SIDE JUNCTION BLOCK RH AND BODY GROUND)
CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK RH - ECU)
ACTIVE HEIGHT CONTROL SUSPENSION - ECU Power Source Circuit
DESCRIPTION
This circuit supplies the power source to the suspension control ECU.
WIRING DIAGRAM
INSPECTION PROCEDURE
Before performing troubleshooting, inspect the connectors of related circuits.
If the suspension control ECU or height control sensor is replaced, the vehicle height offset calibration must be performed ().
| 1.READ VALUE USING INTELLIGENT TESTER (IG POWER SOURCE VOLTAGE) |
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG) and the tester on.
Read the "IG Power Source Voltage" item in the Data List.
AHC| Tester Display | Measurement Item/Range | Normal Condition | Diagnostic Note |
| IG Power Source Voltage | Power supply voltage /
min.: 0 V
max.: 255 V | Engine switch on (IG): 11 to 14 V | - |
| OK | |
| |
| CHECK INDICATOR CIRCUIT ()
|
|
| 2.INSPECT FUSE (ECU-IG NO. 4) |
Remove the ECU-IG No. 4 fuse from the cowl side junction block RH.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| ECU-IG No. 4 fuse | Always | Below 1 Ω |
| 3.INSPECT COWL SIDE JUNCTION BLOCK RH (IG NO. 4 RELAY) |
Disconnect the K34 ECU connector.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
| Tester Connection | Condition | Specified Condition |
| K34-5 (IG) - Body ground | Engine switch on (IG) | 11 to 14 V |
| OK | |
| |
| REPLACE SUSPENSION CONTROL ECU ()
|
|
| 4.CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK RH - ECU AND BODY GROUND) |
Disconnect the K34 and K35 ECU connectors.
Disconnect the 3C cowl side junction block RH connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| K34-5 (IG) - 3C-5 | Always | Below 1 Ω |
| K34-1 (GND) - Body ground | Always | Below 1 Ω |
| K35-6 (GND) - Body ground | Always | Below 1 Ω |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 5.CHECK HARNESS AND CONNECTOR (BATTERY - COWL SIDE JUNCTION BLOCK RH) |
Disconnect the 3A cowl side junction block RH connector.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
| Tester Connection | Condition | Specified Condition |
| 3A-1 - Body ground | Always | 11 to 14 V |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 6.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - COWL SIDE JUNCTION BLOCK RH AND BODY GROUND) |
Disconnect the 3C cowl side junction block RH connector.
Measure the voltage and resistance according to the value(s) in the tables below.
- Standard Voltage:
| Tester Connection | Condition | Specified Condition |
| 3C-22 - Body ground | Engine switch on (IG) | 11 to 14 V |
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| 3C-8 - Body ground | Always | Below 1 Ω |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 7.CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK RH - ECU) |
Disconnect the K34 ECU connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| K34-5 (IG) - Body ground | Always | 10 kΩ or higher |
- If a fuse is blown, replace the fuse.
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| OK | |
| |
| REPLACE COWL SIDE JUNCTION BLOCK RH |
|
