| Last Modified: 11-29-2007 | 1.6 U | |
| Service Category: Suspension | Section: Suspension Control System | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000001N9K00EX |
| Title: SUSPENSION CONTROL: AIR SUSPENSION SYSTEM (w/ AVS): DATA LIST / ACTIVE TEST (2008 Sequoia) | ||
DATA LIST / ACTIVE TEST
1. READ DATA LIST
HINT:
Using a Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may by discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.
NOTICE:
In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Chassis / Air suspension / Data List.
Air Suspension
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
(Up & Down) G Sensor FR |
G (up & down) front acceleration sensor RH reading / min.: -1045.29 m/s2 max.: 1045.26 m/s2 |
0 +/- 0.98 m/s2 at still condition |
Reading changes when vehicle (FR) is bounced |
|
(Up & Down) G Sensor FL |
G (up & down) front acceleration sensor LH reading / min.: -1045.29 m/s2 max.: 1045.26 m/s2 |
0 +/- 0.98 m/s2 at still condition |
Reading changes when vehicle (FL) is bounced |
|
(Up & Down) G Sensor Rear |
G (up & down) rear acceleration sensor reading / min.: -1045.29 m/s2 max.: 1045.26 m/s2 |
0 +/- 0.98 m/s2 at still condition |
Reading changes when vehicle (rear) is bounced |
|
RR Height Control Sensor |
Rear height control sensor RH reading / min.: -3276.8 mm (-129 in.) max.: 3276.7 mm (129 in.) |
Min.: -30 mm (-1.18 in.) Max.: 30 mm (1.18 in.) |
- |
|
RL Height Control Sensor |
Rear height control sensor LH reading / min.: -3276.8 mm (-129 in.) max.: 3276.7 mm (129 in.) |
Min.: -30 mm (-1.18 in.) Max.: 30 mm (1.18 in.) |
- |
|
Stop Light Switch |
Stop light switch / ON or OFF |
ON: Brake pedal depressed OFF: Brake pedal released |
- |
|
COMFORT Switch |
Absorber control switch (COMFORT) / ON or OFF |
ON: COMFORT OFF: Normal |
- |
|
SPORT Switch |
Absorber control switch (SPORT) / ON or OFF |
ON: SPORT OFF: Normal |
- |
|
Manual Mode Switch |
Height control mode select switch (Manual) / ON or OFF |
ON: Height control mode select switch ON condition OFF: Height control mode select switch OFF condition |
- |
|
Door Switch |
Door courtesy light switch signal / ON or OFF |
ON: Open each door OFF: Close all doors |
- |
|
Height Control Switch (Up) |
Height control switch (Up) / ON or OFF |
ON: Height control switch "UP" button pressed OFF: - |
- |
|
Height Control Switch (Down) |
Height control switch (Down) / ON or OFF |
ON: Height control switch "DOWN" button pressed OFF: - |
- |
|
Height Position |
Vehicle height condition reading / NORMAL or NOT NOR |
NORMAL: Vehicle height normal NOT NOR: Vehicle height not normal |
- |
|
Height Control |
Vehicle height control condition reading / ON or OFF |
ON: Vehicle height control operating OFF: Vehicle height control not operating |
- |
|
TC Terminal |
TC terminal / ON or OFF |
ON: DTC recorded OFF: No DTC recorded |
- |
|
TS Terminal |
TS terminal / ON or OFF |
ON: During test mode OFF: Normal mode |
- |
|
FR Wheel Speed |
Wheel speed (Front right) reading / min.: 0 km/h (0 mph), max.: 255 km/h (159 mph) |
Actual vehicle speed |
Speed indicated on the speedometer |
|
FL Wheel Speed |
Wheel speed (Front left) reading / min.: 0 km/h (0 mph), max.: 255 km/h (159 mph) |
Actual vehicle speed |
Speed indicated on the speedometer |
|
RR Wheel Speed |
Wheel speed (Rear right) reading / min.: 0 km/h (0 mph), max.: 255 km/h (159 mph) |
Actual vehicle speed |
Speed indicated on the speedometer |
|
RL Wheel Speed |
Wheel speed (Rear left) reading / min.: 0 km/h (0 mph), max.: 255 km/h (159 mph) |
Actual vehicle speed |
Speed indicated on the speedometer |
|
IG Power Source Voltage |
ECU power supply voltage / min.: 0 V, max.: 25.5 V |
Actual ECU power supply voltage: 11 to 14 V |
- |
|
+B Power Source Voltage |
+B power source voltage / min.: 0 V, max.: 25.5 V |
Actual battery power supply voltage: 11 to 14 V |
- |
|
Steering Angle |
Steering angle sensor reading / min.: -49152° max. 49150.5° |
Actual steering angle Left turn: reading increases Right turn: reading decreases |
- |
|
Engine Speed |
Crankshaft position sensor reading / min.: 0 rpm, max.: 25500 rpm |
Actual engine speed |
Engine speed indicated on the tachometer |
|
Damper Step FR |
Damper step (Front RH) / min.: 0 step max.: 255 steps |
min.: 1 step max.: 16 steps |
- |
|
Damper Step FL |
Damper step (Front LH) / min.: 0 step max.: 255 steps |
min.: 1 step max.: 16 steps |
- |
|
Damper Step RR |
Damper step (Rear RH) / min.: 0 step max.: 255 steps |
min.: 1 step max.: 16 steps |
- |
|
Damper Step RL |
Damper step (Rear LH) / min.: 0 step max.: 255 steps |
min.: 1 step max.: 16 steps |
- |
|
Rear Gate Solenoid |
Height control valve solenoid (Gate solenoid valve) / ON or OFF |
ON: Gate solenoid operated OFF: Gate solenoid not operated |
- |
|
Rear Leveling Solenoid |
Height control valve solenoid (Leveling solenoid valve) / ON or OFF |
ON: Leveling solenoid operated OFF: Leveling solenoid not operated |
- |
|
Exhaust Solenoid |
Exhaust solenoid valve / ON or OFF |
ON: Exhaust solenoid valve operated OFF: Exhaust solenoid valve not operated |
- |
|
Motor Relay |
AIR SUS relay / ON or OFF |
ON: Compressor operated OFF: Compressor not operated |
- |
|
Main Relay |
MAIN relay / ON or OFF |
ON: MAIN relay operated OFF: MAIN relay not operated |
- |
|
Number of Trouble Codes |
Number of DTC recorded / min.: 0, max.: 255 |
Min.: 0, Max.: 255 |
- |
|
Max Damper Step FR |
Damper step (Front RH) / min.: 0 step max.: 255 steps |
16 steps |
- |
|
Max Damper Step FL |
Damper step (Front LH) / min.: 0 step max.: 255 steps |
16 steps |
- |
|
Max Damper Step RR |
Damper step (Rear RH) / min.: 0 step max.: 255 steps |
16 steps |
- |
|
Max Damper Step RL |
Damper step (Rear LH) / min.: 0 step max.: 255 steps |
16 steps |
- |
2. PERFORM ACTIVE TEST
HINT:
Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Chassis / Air suspension / Active Test.
Air Suspension
|
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Damper Step FR |
Changes damper step (Front RH) / |
min.: 1 step max.: 16 steps |
Shock absorber hardens as damper step increases |
|
Damper Step FL |
Changes damper step (Front LH) / |
min.: 1 step max.: 16 steps |
Shock absorber hardens as damper step increases |
|
Damper Step RR |
Changes damper step (Rear LH) / |
min.: 1 step max.: 16 steps |
Shock absorber hardens as damper step increases |
|
Damper Step RL |
Changes damper step (Rear RH) / |
min.: 1 step max.: 16 steps |
Shock absorber hardens as damper step increases |
|
Rear Wheel Up/Down |
Rear vehicle height/ |
UP or DOWN |
- |
|
Rear Gate Solenoid |
Gate solenoid valve/ |
ON or OFF |
Operation sound of solenoid (clicking sound) can be heard |
|
Rear Leveling Solenoid |
Leveling solenoid valve/ |
ON or OFF |
Operation sound of solenoid (clicking sound) can be heard |
|
Exhaust Solenoid |
Exhaust solenoid valve/ |
ON or OFF |
Operation sound of solenoid (clicking sound) can be heard |
|
Compressor Motor Relay |
AIR SUS relay/ |
ON or OFF |
Operation sound of solenoid (clicking sound) can be heard |
|
|