PINPOINT TEST G531332p32 : EMS CONTROL RELAY MALFUNCTION

Pinpoint Tests

PINPOINT TEST G531332p32 : EMS CONTROL RELAY MALFUNCTION

G531332t149 : CHECK THE EMS RELAY PERMANENT SUPPLY
1. Key off.
2. Remove the EMS relay.
3. Measure the voltage between:

Relay base Battery
Pin 01
Negative terminal
Pin 05

- Are both voltages greater than 10 volts?

-> YES
GO to Pinpoint Test G531332t150.

-> NO
REPAIR the circuit between the relay base and battery. CLEAR the DTC. TEST the system for normal operation.

G531332t150 : CHECK THE ECM TO EMS RELAY CONTROL CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the ECM electrical connector, EC300.
2. Measure the resistance between:

Relay base ECM connector EC300,
harness side
Pin 02 Pin 16

- Is the resistance greater than 5 ohms?

-> YES
REPAIR the high resistance circuit. CLEAR the DTC. TEST the system for normal operation.

-> NO
GO to Pinpoint Test G531332t151.

G531332t151 : CHECK THE EMS RELAY TO ECM SUPPLY CIRCUIT FOR HIGH RESISTANCE
1. Measure the resistance between:

Relay base ECM connector EC300,
harness side
Pin 04
Pin 03
Pin 06

- Is either resistance greater than 5 ohms?

-> YES
REPAIR the high resistance circuit. CLEAR the DTC. TEST the system for normal operation.

-> NO
INSTALL a new EMS relay. CLEAR the DTC. TEST the system for normal operation.