18 · Electrical

Ignition control module (icm) (page 4 of 4)

ElectricalIgnition control module (icm) · page 4 of 4

Note: Before testing, check the No. 2 (15 A) fuse in the passenger compartment fuse/relay box.

A Engine mount control unit
B View from wire side
Disconnect the 5 – P connector from the engine mount control unit.
Inspect the connector and socket terminals to be sure they are all making good contact.

If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
If the terminals look OK, make the following input tests at the connector.

– If any test indicates a problem, find and correct the cause, then recheck the system.
– If all the input tests prove OK, the engine mount control unit must be faulty; replace it.

No.	Terminal	Test condition	Test: Desired result	Possible cause if result is not obtained
1	BLK	Under all conditions	Check for continuity to earth: There should be continuity.	● Poor earth (LHD: G401) ● An open in the wire
2	BLK/YEL	Ignition switch ON (II)	Check for voltage to earth: There should be battery voltage.	● An open in the wire
3	GRN/WHT	Ignition switch ON (II)	Check for voltage to earth: There should be battery voltage.	● Faulty engine mount control solenoid valve ● An open in the wire
4	BLU	Start the engine	Check for voltage to earth: There should be battery voltage.	● Faulty ignition system ● An open in the wire

Replace the engine mount control unit if the mount is not defective and no defects are found in the above input tests.

Parts & tools for this job For Rover 600

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