Jeep Grand Cherokee WK. Manual — part 252

U0019–CAN B BUS (CONTINUED)

3.

CAN B BUS (+) CIRCUIT OPEN

Turn the ignition off.

Disconnect the Amplifier harness connector.

Disconnect the Front Control Module C1 harness connector.

Measure the resistance of the (D55) Can B Bus (+) circuit between the
Front Control Module C1 harness connector and the Amplifier harness
connector.

Is the resistance below 2.0 ohms?

Yes

>> Go To 4

Perform BODY VERIFICATION TEST - VER 1.

No

>> Repair the Can B Bus (+) circuit for an open.

Perform BODY VERIFICATION TEST - VER 1.

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AUDIO/VIDEO SYSTEMS - ELECTRICAL DIAGNOSIS

WK

U0019–CAN B BUS (CONTINUED)

4.

CAN B BUS (–) CIRCUIT OPEN

Measure the resistance of the (D54) Can B Bus (–) circuit between the
Front Control Module C1 harness connector and the Amplifier harness
connector.

Is the resistance below 2.0 ohms?

Yes

>> Replace the Amplifier in accordance with the service infor-

mation..

Perform BODY VERIFICATION TEST - VER 1.

No

>> Repair the Can B Bus (–) circuit for an open.

Perform BODY VERIFICATION TEST - VER 1.

WK

AUDIO/VIDEO SYSTEMS - ELECTRICAL DIAGNOSIS

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U0020-CAN B BUS OFF PERFORMANCE

For the Amplifier circuit diagram (Refer to 8 - ELECTRICAL/AUDIO - SCHEMATICS AND DIAGRAMS).

For a complete wiring diagram Refer to Section 8W.

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U0020-CAN B BUS OFF PERFORMANCE (CONTINUED)

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AUDIO/VIDEO SYSTEMS - ELECTRICAL DIAGNOSIS

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