Last Modified: 4-30-2014 6.6 C Doc ID: RM000001CUC002X
Model Year: 2006 Model: LX470 Prod Date Range: [05/2005 -           ]
Title: SUSPENSION CONTROL: ACTIVE HEIGHT CONTROL SUSPENSION: C1796/96; Differential Lock Detect Signal Circuit Malfunction; 2006 MY LX470 [05/2005 -        ]

DTC

C1796/96

Differential Lock Detect Signal Circuit Malfunction

DESCRIPTION

This circuit sends the signal to the ECU by detecting that the transfer differential is in the LOCK condition.

DTC No.

DTC Detection Condition

Trouble Area

C1796/96

Center differential lock position switch signal does not change

  • Center differential lock position switch
  • Suspension control ECU
  • Wire harness

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

When using the intelligent tester, start from *1. When not using the intelligent tester, start from *2.

PROCEDURE

1.

READ VALUE USING INTELLIGENT TESTER (CENTER DIFFERENTIAL LOCK POSITION SWITCH)*1

(a) Connect the intelligent tester (with CAN VIM) to the DLC3.

(b) Turn the ignition switch ON and push the intelligent tester main switch ON.

(c) Select the DATA LIST mode on the intelligent tester.

(d) Check the center differential lock switch condition displayed on the intelligent tester when pushing the center differential lock switch.

OK:

When the center differential lock switch pushed once

ON is displayed for the center differential lock position switch condition.

When the center differential lock switch pushed twice

OFF is displayed for the center differential lock position switch condition.

NG

GO TO STEP 3

OK

REPLACE SUSPENSION CONTROL ECU

2.

CHECK SUSPENSION CONTROL ECU*2

(a) Remove the suspension control ECU with connectors still connected.

(b) Turn the ignition switch ON.

(c) Measure the voltage between terminal EXI of the suspension control ECU connector and body ground when the center differential lock switch is pushed twice.

Standard voltage:

Tester Connection

Condition

Specified Condition

S6-18 (EXI) - Body ground

Pushed once

Below 1.5 V

S6-18 (EXI) - Body ground

Pushed twice

9 to 14 V

NG

REPLACE SUSPENSION CONTROL ECU

OK

3.

INSPECT CENTER DIFFERENTIAL LOCK POSITION SWITCH

(a) Disconnect the center differential lock position switch connector.

(b) Remove the center differential lock position switch 2006 MY LX470 [05/2005 -        ]; HF2A TRANSFER: TRANSFER ASSEMBLY: COMPONENTS .

(c) Measure the resistance between terminals 1 and 2 of center differential lock switch connector when the center differential lock position switch pushed and released.

Standard resistance:

Tester Connection

Condition

Specified Condition

1 - 2

Pushed

Below 1 Ω

1 - 2

Released

10 kΩ or higher

NG

REPLACE CENTER DIFFERENTIAL LOCK POSITION SWITCH

OK

4.

CHECK WIRE HARNESS (CENTER DIFFERENTIAL LOCK POSITION SWITCH - SUSPENSION CONTROL ECU)

NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

REPLACE SUSPENSION CONTROL ECU