TSRM/MK4 Supra/Repair Manual
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PS/Steering — Pps ECU Inspection, page 50

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p.051
Pps ECU Inspection — MK4 Supra Steering, page 50
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Page text (OCR transcript)
SR–50
STEERING – ELECTRONIC CONTROL SYSTEM

PPS ECU INSPECTION

Register No.4 Duct
Register No.5 Duct
PPS ECU
Instrument Panel Box
R11308

GND SOL ⊖
R07587

1. JACK UP VEHICLE AND SUPPORT IT ON STANDS
2. START ENGINE
3. MEASURE VOLTAGE OF ECU
(a) Using a voltmeter, measure the voltage between ECU terminals SOL ⊖ and GND while the engine is idling.
Standard voltage:
0.15–0.20 V

37 mph (60km/h)
GND SOL ⊖
R07588

(b) Place the transmission in gear and while running at about 37 mph (60 km/h), measure the voltage between ECU terminals SOL ⊖ and GND.
Standard voltage:
Voltage measured in (a) above, minus
2JZ–GE: 0.02–0.08 V
2JZ–GTE: 0.01–0.07 V
If no voltage, try another ECU.
4. LOWER VEHICLE