UZZ32 Active Computer Diagnostics - Written by Richard Ashcroft in June 2003

Hi all Active owners,

just wanted to update all on my suspension saga.

But first, I just wanted to encourage everyone to share info on these cars. I've just spent 2 months trying to figure out my issue and gave a crap load of money to someone to try and fix it. Although I'm not mechanically minded, I'd sure like to give anyone a hand to save them going through what I have over the last couple of months.

With my problem, we installed an alarm and the active error came up. Ran diagnostics and SUS 11 came up. A guy from Japan told me it was left front sensor. Pulled that out, looked at all fuses, visual inspection of wiring, even swapped the height relay with Peter Scott's car, (which by the way is the main relay switch on the cooling fan apparently) and could not find anything.....

Then, I gave it to an electrician (OG Electrical) -The active suspension computer has a number output and input pins. Each of these pins should register a specific voltage range both for output and input signals. Where there is a variance, the manual will tell you where to look. In my case, there was no signal coming back from the left front height sensor or lateral G sensor. The electrician then traced the wiring from the computer to the height sensor and under the passenger kick panel discovered a plug had been disconnected (this is where the alarm installer jacked into the fuel pump loom and must have knocked the plug.)

Now my active does the 'active dance' and handles like it should.

It cost me 500 bucks to learn the above but now I have some info on what the input/output pins should be reading and I'm more than happy to share. I'll have to scan the papers but I'm happy to post them to anyone having problems.

The tables below are also available in easy to print Adobe Acrobat file (pdf). activecomputer.pdf (90kb)
UZZ32 - HYDRO-PNEUMATIC SUSPENSION COMPUTER
.

Connector A

Connector B

Connector C

Connector D

Lateral G Check Connectors, before and after

Connector A (White)

Connector B (Grey)
Connector Pin No Pin
Code		 Input / Output Item Measured Tester
contacts

+ 󠭼/b>

 Measurement
Conditions		 Standard Value Location of Problem
if value not in
standard range
A 1 TC In Voltage A1󠃷 Ignition ON, and diagnosis connector or TDCL pins Tc-E1 shorted 1V or less Diagnosis Connector
Ignition ON, and diagnosis connector or TDCL pins Tc-E1 open 8 – 14V TDCL
2 ES -1 In Continuity A2󠃷 Ordinary Conditions Continuity G Sensor shielding wire before and after
3 TOIL In Voltage A3󠃷 Idling 0.5 – 4.5V Oil temperature sensor
4 PRL In Voltage A25
A3󠏲
A26		 Idling 0.6 – 4.5V Rear (LH) pressure sensor
5 GLG In Voltage A5󠁲4 Ignition ON 0.5 – 4.5V Horizontal? G Sensor, before and after
6 HFL In Voltage A25
A6󠯲
A26		 Ignition ON 0.5 – 4.5V Front (LH) height control sensor
7 HRL In Voltage A25
A7󠯲
A26		 Ignition ON 0.5 – 4.5V Rear (LH) height control sensor
Connector Pin No Pin Code Input / Output Item Measured Tester contacts
+ 󠭼/b>		 Measurement
Conditions		 Standard Value Location of Problem if value not in standard range
A 8 SGFL In Voltage A25
A8󠯲
A26		 Ignition ON 0.5 – 4.5V Front (LH) upper and lower G sensor
9 SGRL In Voltage A25
A9 󠯲
A26		 Ignition ON 0.5 – 4.5V Rear (LH) upper and lower G sensor
10 PACC In Voltage A25
A10 󠯲
A26		 Idling 0.5 – 4.5V Accumulator pressure sensor
11 VG5 Out Voltage A11 󠁲4 Idling 4.7 – 5.3V Computer
12 VL5 Out Voltage A25
A12 󠯲
A26		 Idling 4.7 – 5.3V Computer
13 VR5 Out Voltage A25
A13 󠯲
A26		 Idling 4.7 – 5.3V Computer
14 TS In Voltage A14 󠃷 Ignition ON, and diagnosis connector or TDCL pins Ts – E1 shorted 1V or less Diagnosis connector
Ignition ON, and diagnosis connector or TDCL pins Ts – E1 Open 8 – 14V TDCL connector
Connector Pin No Pin Code Input / Output Item Measured Tester contacts

+ 󠭼/b>

 Measurement Conditions Standard Value Location of Problem if value not in standard range
A 15 ES2 In Continuity A15 󠃷 Ordinary Conditions Continuity Lateral (Transverse?) G sensor shielding wire
16 TD In Voltage A16 󠃷 Ignition ON, and TDCL pins Td -
E1 shorted		 1v or less TDCL Connector
Ignition ON, and TDCL pins Td – E1 open 8 – 14v
17 PRR In Voltage A17 󠁲6 Idling 0.5 – 4.5v Rear (RH) Pressure Sensor
18 GLT In Voltage A18 󠁲4 Ignition ON 0.5 – 4.5v Lateral G sensor, before and after
19 HFR In Voltage A25
A19 󠯲

A26

 Ignition ON 0.5 – 4.5v Front (RH) height control sensor
20 HRR In Voltage A25
A20 󠯲

A26

 Ignition ON 0.5 – 4.5v Rear (RH) height control sensor
22 SGRR In Voltage A25
A22 󠯲

A26

 Ignition ON 0.5 – 4.5v Rear (RH) upper and lower G sensor
Connector Pin No Pin Code Input / Output Item Measured Tester contacts

+ 󠭼/b>

 Measurement Conditions Standard Value Location of Problem if value not in standard range
A 24 EG In Continuity A24 󠃷 Ordinary Conditions Continuity Computer
25 EL A25 󠃷
26 ER A26 󠃷
 
B 1 SS1 In Voltage B1 󠃷 Ignition ON, and turning steering wheel slowly Changes between 1v or less and 5v or more Steering Sensor
5 4WSF In Voltage B5 󠃷 Ignition ON 8 – 14v 4WS computer
6     Voltage B6 󠃷 Ignition ON 8 – 14v ABS computer
7     Voltage B7 󠃷 Ignition ON 8 – 14v Oil level sensor
8     Voltage B8 󠃷 Ignition ON, and suspension control switch at NORM position 8 – 14v Suspension control switch
9     Voltage B9 󠃷 Ignition ON and turning steering wheel slowly Changes between 1v or less and 5v or more Steering Sensor
10     Voltage B10 󠃷 Ignition ON, and travelling slowly Changes between 1v or less and 5v or more Speed Sensor
 
Connector Pin No Pin Code Input / Output Item Measured Tester contacts

+ 󠭼/b>

 Measurement Conditions Standard Value Location of Problem if value not in standard range
B 12 STP In Voltage B12 󠃷 Ignition ON, and brake switch ON 10 – 14v Stop light switch
14 AFFSW In Voltage B14 󠃷 Ignition ON, and suspension control switch ON 10 – 14v Suspension Control Switch
16 ICL In Voltage B16 󠃷 Idling 8v or more IC regulator
 
C 1 +B In Voltage C1 󠃷 Ignition ON 10 – 14v HPS fuse
2 GLG + In Voltage C2 󍊠 C7 Ignition ON, and Connector b GLG + to EG pin is OPEN 5v or more Lateral G sensor before and after
Ignition ON, and Connector b GLG + to EG pin is SHORTED 1v or less
3 GLT + In Voltage C3 󍊠 C7 Ignition ON, and Connector a GLT+ to EG pin is open 5v or more Lateral G sensor before and after
Ignition ON, and Connector a GLT+ to EG pin is shorted 1v or less
Connector Pin No Pin Code Input / Output Item Measured Tester contacts

+ 󠭼/b>

 Measurement Conditions Standard Value Location of Problem if value not in standard range
C 4 ES4 In Continuity C4󠃷 Ordinary Conditions Continuity Computer
5 ES3 C5 󠃷
7 GND Out Continuity C7 󠂯dy earth Ordinary Conditions Continuity Computer

Body Earth
8 GLG In Voltage C8 󍊠 C7 Ignition ON, and Connector a GLG – to EG pin open 5v or more Lateral G sensor before and after
Ignition ON, and Connector a GLG – to EG pin shorted 1v or less
9 GLG In Voltage C9 󍊠 C7 Ignition ON, and Connector a GLT – to EG pin open 5v or more Lateral G sensor before and after
Ignition ON, and Connector a GLT – to EG pin shorted 1v or less
10 ES5 In Continuity C10 󠃷 Ordinary conditions Continuity Computer
12 PN In Voltage C21 󠃷 Ignition ON, and shift lever in P or N range 10 – 14v Neutral start switch

Connector

 Pin No Pin Code Input / Output Item Measured Tester contacts

+ 󠭼/b>

 Measurement Conditions Standard Value Location of Problem if value not in standard range
D 1 +B In Voltage D1 󠃷 Ignition ON 10 – 14v HPS fuse
2 BAT In Voltage D2 󠃷 Ordinary Conditions 8-14v ECU-B fuse
3 HPSF Out Voltage D3 󠃷 Ignition ON 9 – 14v Computer
4 ACTV HIGH Out Voltage D4 󠃷 Idling, and suspension control switch on HIGH 10 – 14v Combination meter
5 ACTV SUS Out Voltage D5 󠃷 Idling 1v or less Combination meter
6 ACTV OFF Out Voltage D6 󠃷 Ignition ON, and suspension control switch OFF 1v or less Combination meter
7 SFL+ Out Voltage D7 󠃷 In idling stage, put shift lever into position other than P or the N range and/to achieve controlled stage, put shift lever in P or N range 0.36 – 7.7v The various absorber control solenoid valves
8 SFR+   D8 󠃷
9 SRL+   D9 󠃷
10 SRR+   D10 󠃷
11 SBYP+ Out Voltage D11 󠃷 In idling stage, put shift lever into position other than P or the N range and/to achieve controlled stage, put shift lever in P or N range 0.36 – 7.7v Suspension control solenoid valve

Connector

 Pin No Pin Code Input / Output Item Measured Tester contacts

+ 󠭼/b>

 Measurement Conditions Standard Value Location of Problem if value not in standard range
D 12 GND Out Continuity D12 󠂯dy Earth Ordinary Conditions Continuity
  • Computer
  • Body earth
13 IG In Voltage D13 󠃷 Ignition ON 10 – 14v ECU-IG Fuse
18 TEM In Voltage D18 󠃷 Ignition ON 1v or less Diagnosis connector
19 CRY Out Voltage D19 󠃷 Ignition ON, and suspension fluid at 70C or more 10 – 14v - Oil temperature sensor

- Computer
Ignition ON, and suspension fluid at 60C or less 1v or less
20 RLY Out Voltage D20 󠃷 Ignition ON 10 – 14v Computer
21 SFL Out Voltage D21 󠂯dy earth Ordinary Conditions 0 – 0.5v - Computer

- Body earth
22 SFR D22 󠂯dy earth
23 SRL D23 󠂯dy earth
24 SRR D24 󠂯dy earth
25 SBYP D25 󠂯dy earth
The ALSC thanks Richard Ashcroft for this well presented article.