Monza, Kadett, and Ipanema Multec 700 GM ECU Components Pinout
Applicable Vehicles: Monza, Kadett, and Ipanema (1991–1996 models)
More ECU PINOUT Components:
ECU Modules Repair Pinpout & Components
Main ECU Components and Pinout
- Injector Drive
- 16156085 – Fuel Pump Relay Drive
- 34993 – Stepper Motor Drive
- Delco 196 E – 16045980 – PF Relay (Injection Light, Flight Computer, V2 Fan)
- Processor
- Delco 196 E – 16045980 (V1 Fan, Heating Relay Collector, Ascending Light, A/C Relay)
- 34992 – 5V Regulator
- NTC Sensor
- Processor
- Crystal Clock
- EPROM, 27C128
Technical Specifications
Special Features:
- Multec 700 ECUs are identical in hardware, with differences only in the calibration memory (Mencal).
- Drive Beak: Uses IRF540 or IRFZ34N transistors.
Common Defects:
- Fan Relay Drive Failure
- Poor Contact at Injector Secondary Drive Terminals and Pump: This can cause ECU failure when moved. Re-soldering the terminals is recommended.
Injector Drive – 3 Pins
- This component is an NPN transistor with a ferrite washer to minimize electromagnetic interference.
- Trigger Voltage: 10V range.
Injector Pulse Requirement:
- To enable injector pulsing, terminals D9 and D10 must be bridged.
- Grounding pin D10 ensures proper injector operation.
- All ECUs are identical; the only variation is the calibration month.
Component Details
Processor
- Core component managing ECU operations.
Mencal (Calibration Memory)
- Stores calibration parameters for ECU operation.
5V Regulator (34992) – 15 Pins
- Regulates voltage supply to essential ECU components.
Delco 169 E (PF Relay and V1 Fan Control)
- Delco 169 E – 1: Handles PF relay, injection light, computer board, and V2 fan (15 pins).
- Input (Trigger): Negative
- Output: Negative
- Delco 169 E – 2: Controls V1 fan and heater relay collector.
Stepper Motor Drive (34993) – 9 Pins
- When ignition is turned off, the ECU runs an automatic stepper motor test.
- Diagnosis can be performed using an oscilloscope by toggling the ignition.

Pump Relay Drive and Injector Drive
- Critical components for fuel system operation.